The genetic relationships among different inbred stocks of corn with respect to different indices... more The genetic relationships among different inbred stocks of corn with respect to different indices of photosynthetic efficiency and plant productivity was assessed by means of dialM graphs. The salient feature of the current study was "apparent overdominance" for some important indices of photosynthetic efficiency, viz. photosynthetic rate/unit leaf area (at the silking stage), total chlorophyll content and chlorophyll a content, as well as for total dry matter production and economic yield. The results could be explained in terms of complementary gene action and the multiplicative effects of the sub-components that comprise these traits. However, complete dominance was recorded for photosynthetic rate (at the grain filling period), leaf area/plant, number of leaves/plant, number of leaves above the ear, ratio of chlorophyll a/b and harvest index. In the majority of cases graphic analysis was possible only when a number of epistatic parents were omitted from the analysis. Although the position of the array points for different indices of photosynthetic efficiency was consistent across the years, the ontogenetic and seasonal differences in the genetic behaviour of parents, meaning thereby, different loci being active at different stages and seasons, was apparent. The same was true for the epistatic parents. Non-allelic interaction of the genes rather than the nonrandom distribution of the genes among the parents seemed to be the most common cause of disturbance in the Wr/V r relationship. Inbred stock MG 115 was identified to be the most promising because it embodied an efficient photosynthetic machinery by virtue of increasing the number of alleles for a majority of the indices of photosynthetic efficiency,
Nature and magnitude of genetic diversity was assessed using Mahalanobis's D2 statistics and ... more Nature and magnitude of genetic diversity was assessed using Mahalanobis's D2 statistics and canonical analysis in 50 genotypes of soybean grown in monoculture and in association with maize. All the genotypes were grouped in 10 clusters in case of monoculture, while 8 clusters were formed for intercropping. Monoculture was more suitable environment for expressing the genetic diversity than intercrop. Some genotypes had consistently the similar clustering pattern in both the cropping systems, while others were affected by the cropping system in expressing the genetic diversity. This was confirmed by the canonical analysis. Days to flowering and maturity, seed yield/plant, plant height and 100‐seed weight were mainly responsible for genetic diversity in monoculture. Besides phenological traits, pod length and width, and seed yield/plant exerted marked influence on the genetic diversity of soybean genotypes grown in association with maize. Geographical distribution was not necessar...
The effect of cropping system on the nature and magnitude of gene action for grain yield and its ... more The effect of cropping system on the nature and magnitude of gene action for grain yield and its component traits was assessed in the parents and progeny of a diallel cross in soybean grown both as a sole crop and with maize. Greater expression of yield components and higher seed yield occurred in sole cropping than in intercropping. There were strong progenies × cropping system interactions for different traits. Cropping system had a large influence on the genetic control of yield and its components. Both additive (tr 2) and non-additive (try) genetic variances were important in the genetic determination of seed yield and its components. However, the ratio oftr2A to tr 2 was greater under monoculture than under intercropping for all the traits except harvest index and 100-seed weight where it increased, thereby indicating that cropping systems influence the genetic control of important yield components. Further, the occurrence of low genotypic correlations for yield and its components across and cropping systems justify the selection of different parents and crosses for sole and intercropped soybeans.
Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at ht... more Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/23/4-1-3/3 The 23rd International Grassland Congress (Sustainable use of Grassland Resources for Forage Production, Biodiversity and Environmental Protection) took place in New Delhi, India from November 20 through November 24, 2015. Proceedings Editors: M. M. Roy, D. R. Malaviya, V. K. Yadav, Tejveer Singh, R. P. Sah, D. Vijay, and A. Radhakrishna Published by Range Management Society of India
This paper studies the product [Formula: see text] of the binomial coefficients in the [Formula: ... more This paper studies the product [Formula: see text] of the binomial coefficients in the [Formula: see text]th row of Pascal’s triangle, which equals the reciprocal of the product of all the reduced and unreduced Farey fractions of order [Formula: see text]. It studies its size as a real number, measured by [Formula: see text], and its prime factorization, measured by the order of divisibility [Formula: see text] by a fixed prime [Formula: see text], each viewed as a function of [Formula: see text]. It derives three formulas for [Formula: see text], two of which relate it to base [Formula: see text] radix expansions of integers up to [Formula: see text], and which display different facets of its behavior. These formulas are used to determine the maximal growth rate of each [Formula: see text] and to explain structure of the fluctuations of these functions. It also defines analogous functions [Formula: see text] for all integer bases [Formula: see text] using base [Formula: see text] r...
Environmental Science and Pollution Research, 2016
Pinus gerardiana is considered an important species in dry temperate forests of North-Western Ind... more Pinus gerardiana is considered an important species in dry temperate forests of North-Western Indian Himalaya because of its influence on ecological processes and economic dependence of local people in the region. But, large numbers of biotic and abiotic factors have affected P. gerardiana in these forests; hence, there is a crucial need to understand the regeneration dynamics of this tree species. The present investigation was conducted in P. gerardiana forests to understand vegetation pattern and regeneration processes on different sites in the region. Statistical analysis was performed to know variability in growing stock and regeneration on sample plots, while correlation coefficients and regression models were developed to find the relationship between regeneration and site factors. The vegetation study showed dominance of P. gerardiana, which is followed by Cedrus deodara, Pinus wallichiana and Quercus ilex in the region. The growing stock of P. gerardiana showed steep increasing and then steadily declining trend from lower to higher diameter class. The distribution of seedling, sapling, pole and trees was not uniform at different sites and less number of plots in each site were observed to have effective conditions for continuous regeneration, but mostly showed extremely limited regeneration. Regeneration success ranging from 8.44 to 15.93 % was recorded in different sites of the region, which suggests that in different sites regeneration success is influenced by collection of cone for extracting seed, grazing/browsing and physico-chemical properties of soil. Regeneration success showed significant correlation and relationship with most of abiotic and biotic factors. The regeneration success is lower than the requirement of sustainable forest, but varies widely among sites in dry temperate forests of Himalaya. More forest surveys are required to understand the conditions necessary for greater success of P. gerardiana in the region.
ABSTRACT Pinus gerardiana Wall. is an important eco- logical and economic forestry species having... more ABSTRACT Pinus gerardiana Wall. is an important eco- logical and economic forestry species having restricted distribution in India. It has been observed that natural regeneration of the species is extremely poor or entirely lacking. This species has erratic and infrequent seed years and dormancy related problems that also reduce regeneration process in natural habitats. Therefore, different treatments of gibberellic acid and temperature were tried to enhance the germination in the species by subjecting seeds to two gibberellic acid concentrations (75 and 150 ppm) along with control, following four soaking periods (Control, 8, 16 and 24 h) and two incubation temperatures (15 and 25 oC) for assessing their impact on seed germination. It was observed that among different gibberellic acid concentrations highest germinability parameters were observed, when seeds were treated with 75 ppm GA3. Among different soaking periods highest germination was observed when seed were soaked for 24 h. The incubation temperature showed better results at 15 oC in comparison to 25 oC. The present study identified gibberellic acid treatment of 75 ppm, seed soaking for 24 h at 15 oC incubation temperature best treatment for enhancing germination.
Investigations were conducted on 58 Indian wheats for assessing the extent of genetic diversity f... more Investigations were conducted on 58 Indian wheats for assessing the extent of genetic diversity for leaf rust resistnace. Seedling studies of these wheats had indicated that the genetic basis of resistnace was due to 9 Lr genes while the adult plant resistance studies showed as many as 18 distinct groups. Seedling testings of these genotypes displayed the maximum preponderance of Lr26, Lr34, Lr13 and Lr23 genes and all of them have become susceptible to the newly evolved pathotypes of leaf rust barring Lr34. Therefore there was an urgent necessity to mobilize the highly effective resistance genes Lr9, Lr19, Lr24 and Lr28 in breeding programmes.. Lr34, partial adult plant resistance gene which is invariably associated with durable resistance, confers a high degree of adult plant resistance in combination with other seedling resistance genes in these studies. Therefore a data base of adult plant resistance sources must be characterised in terms of the number and the nature of resistan...
Provenance evaluation of bhimal (Grewia optia J R Drumm. ex Burret) was initiated in 1995 with re... more Provenance evaluation of bhimal (Grewia optia J R Drumm. ex Burret) was initiated in 1995 with respect to growth and productivity parameters for assessing genetic variations and identifying the most productive provenances which could be recommended in prevailing agroforestry systems. The materials comprised seven provenances of G. optiva collected from different locations of the northern states of Uttarakhand and Himachal Pradesh and planted in complete randomized block design with three replications. The data were recorded for growth and productivity parameters for 10 years. Significant variations were recorded for growth and productivity parameters. The highest fresh fodder productivity recorded in I C Malas 3.57 tonnes/ha, statistically at par with I C Bhaintan 3.49±0.04 tonnes/ha) was 1.21 times more than the least productive provenance I C Nauni. However, in respect of dry weight of debarked fuelwood and dry weight of bark fibre, I C Bhaintan produced 0.71 and 0.37 tonnes/ha bi...
Forty exotic genetic stocks of bread wheat were tested in glasshouse and isolated single race nur... more Forty exotic genetic stocks of bread wheat were tested in glasshouse and isolated single race nurseries against three pathotypes of race 77 and with mixture of pathotypes to observe their seedling and adult plant resistance to leaf rust. Twenty five genotypes showed adult plant resistance and significant genetic differences were detected to enable their grouping in 8 distinct classes. Fifteen genetic stocks depicted seedling resistance at the seedling and adult plant stages when tested against race. 77-5 and were placed in three distinct groups. The study indicated that adequate variability for seedling and adult plant resistance to leaf rust exists in these germplasm accessions when tested against native pathotypes of leaf rust.
The present studies were undertaken with a view to assess the genetic diversity for different mor... more The present studies were undertaken with a view to assess the genetic diversity for different morphophysiological traits and yield and yield components in barnyard millet. Clustering patterns of genotypes by different methods suggested that there was considerable genetic diversity among the lines. On the basis of D2 analysis, 18 genotypes could be grouped into eight clusters. Two genotypes viz. KE90 (Cluster V) and PRB 9402 (Cluster VIII) embodied the genes for earliness and higher yields, respectively and a hybridization programme between them can throw early maturing and high yielding segregants.
India produces around 19.0 million tonnes of tomatoes annually, which is insufficient to meet the... more India produces around 19.0 million tonnes of tomatoes annually, which is insufficient to meet the ever-increasing demand. A big gap of tomato productivity (72.14 t ha–1) between India (24.66 t ha–1) and the USA (96.8 t ha–1) exist, which can be bridged by integrating trellis system of shoot training, shoot pruning, liquid fertilizers, farmyard manure, and mulching technologies. Therefore, the present experiment was conducted on tomato (cv. Himsona) during 2019–2020 at farmers' fields to improve tomato productivity and quality. There were five treatments laid in a randomized block design (RBD) with three replications; T1 [Farmer practice on the flatbed with RDF @ N120:P60:K60 + FYM @6.0 t ha−1 without mulch], T2 [T1 + Polythene mulch (50 microns)], T3 [Tomato plants grown on the raised bed with polythene mulch + FYM @ 8.0 t ha−1 + Single shoot trellis system + Side shoot pruning + Liquid Fertilizer (LF1—N19:P19:K19) @ 2.0 g l–1 for vegetative growth + Liquid Fertilizer (LF2—N0: P...
A field experiment was undertaken to identify profitable land use based on productivity, net pres... more A field experiment was undertaken to identify profitable land use based on productivity, net present value, biomass and carbon stocks in litchi based land uses (LBLUs) during 1995–2015 established on degraded riverbed lands of western Himalaya, India. Results of LBLUs (20 years) revealed that LCT + LH + LPG land use produced 6.10–25.27%, 5.82–14.92% and 3.45–13.62% more fruit yield, 14.61–25.22%, 10.18–16.38% and 9.10–16.62% more total biomass, 2.95–9.51%, 0.03–4.54% and 1.60–8.26% higher carbon in soil and 6.93–14.76%, 4.60–10.03% and 6.29–13.14% more total carbon stocks as compared to sole litchi land use of 1st, 2nd and 3rd phase, respectively. Similarly, 80.39% and 78.56% more NPV, 11.74% and 19.77% higher BCR with shortest payback period (5 years) were realized in LCT + LH + LPG land use for 20 and 50 years, respectively. Sensitivity analysis also revealed that changes in discount rate will not affect its performance ranking.
International Journal of Intellectual Property Management, 2014
ABSTRACT The study was conducted to monitor the trend of patenting activity in agriculture sector... more ABSTRACT The study was conducted to monitor the trend of patenting activity in agriculture sector during 2005 to 2012 in India based on 3,718 published patent applications and 1,041 granted patents of the Indian Patent Office weblink, IPAIRS Version 2.0. There was gradual increase in patenting activity during 2005 to 2012 in different sectors of agriculture. Maximum percentage of patent applications were filed in biocides, pest repellants or attractants and plant growth regulators (60%), followed by new plants or processes for obtaining them (9.35%), animal husbandry, silk rearing or breeding new animal breeds (7.48%) and horticulture, cultivation, forestry (5.91%). Diversification in Indian agriculture was also noticeable during the period 2005 to 2012 as dairy products and animal husbandry registered 19.0 and 5.78 times increase in patenting activity over the period 1995-2004 besides development of new plants and processes (10.87 times) and horticulture and cultivation forestry rising (5.87 times). Public sector organisations and companies sector must forge public-private partnerships to address the R&D gaps and generate technologies at affordable prices in the field of agriculture to the stakeholders in the developing countries in the backdrop of product patent regime.
ABSTRACT Grewia optiva Drummond is one of important agroforestry tree species grown by the farmer... more ABSTRACT Grewia optiva Drummond is one of important agroforestry tree species grown by the farmers in the lower and mid-hills of western Himalaya. Different models viz., monomolicular, logistic, gompetz, allometric, rechards, chapman and linear were fitted to the relationship between total biomass and diameter at breast height (DBH) as independent variable. The adjusted R2 values were more than 0.924 for all the seven models implying that all models are apparently equally efficient. Out of the six non-linear models, allometric model (Y = a 9 DBHb) fulfils the validation criterion to the best possible extent and is thus considered as best performing. Biomass in different tree components was fitted to allometric models using DBH as explanatory variable, the adjusted R2 for fitted functions varied from 0.872 to 0.965 for different biomass components. The t values for all the components were found non-significant (p[0.05), thereby indicating that model is valid. Using the developed model, the estimated total biomass varied from 6.62 Mg ha-1 in 4 year to 46.64 Mg ha-1 in 23 year old plantation. MAI in biomass varied from 1.66–2.05 Mg ha-1 yr-1. The total biomass carbon stocks varied from 1.99 Mg ha-1 in 4 year to 15.27 Mg ha-1 in 23 year old plantation. Rate of carbon sequestration varied from 0.63–0.81 Mg ha-1 yr-1. Carbon storage in the soil up to 30 cm soil depth varied from 25.4 to 33.6 Mg ha-1.
Harsh Mehtat & Kumud Ranjan Sarkar Division of Genetics, Indian Agricultural Research Institute, ... more Harsh Mehtat & Kumud Ranjan Sarkar Division of Genetics, Indian Agricultural Research Institute, New Delhi-110012, India; 'Present address: Assistant Professor of Genetics, Department of Plant Breeding and Genetics, HPKV, Palampur-176062, HP, India
The genetic relationships among different inbred stocks of corn with respect to different indices... more The genetic relationships among different inbred stocks of corn with respect to different indices of photosynthetic efficiency and plant productivity was assessed by means of dialM graphs. The salient feature of the current study was "apparent overdominance" for some important indices of photosynthetic efficiency, viz. photosynthetic rate/unit leaf area (at the silking stage), total chlorophyll content and chlorophyll a content, as well as for total dry matter production and economic yield. The results could be explained in terms of complementary gene action and the multiplicative effects of the sub-components that comprise these traits. However, complete dominance was recorded for photosynthetic rate (at the grain filling period), leaf area/plant, number of leaves/plant, number of leaves above the ear, ratio of chlorophyll a/b and harvest index. In the majority of cases graphic analysis was possible only when a number of epistatic parents were omitted from the analysis. Although the position of the array points for different indices of photosynthetic efficiency was consistent across the years, the ontogenetic and seasonal differences in the genetic behaviour of parents, meaning thereby, different loci being active at different stages and seasons, was apparent. The same was true for the epistatic parents. Non-allelic interaction of the genes rather than the nonrandom distribution of the genes among the parents seemed to be the most common cause of disturbance in the Wr/V r relationship. Inbred stock MG 115 was identified to be the most promising because it embodied an efficient photosynthetic machinery by virtue of increasing the number of alleles for a majority of the indices of photosynthetic efficiency,
Nature and magnitude of genetic diversity was assessed using Mahalanobis's D2 statistics and ... more Nature and magnitude of genetic diversity was assessed using Mahalanobis's D2 statistics and canonical analysis in 50 genotypes of soybean grown in monoculture and in association with maize. All the genotypes were grouped in 10 clusters in case of monoculture, while 8 clusters were formed for intercropping. Monoculture was more suitable environment for expressing the genetic diversity than intercrop. Some genotypes had consistently the similar clustering pattern in both the cropping systems, while others were affected by the cropping system in expressing the genetic diversity. This was confirmed by the canonical analysis. Days to flowering and maturity, seed yield/plant, plant height and 100‐seed weight were mainly responsible for genetic diversity in monoculture. Besides phenological traits, pod length and width, and seed yield/plant exerted marked influence on the genetic diversity of soybean genotypes grown in association with maize. Geographical distribution was not necessar...
The effect of cropping system on the nature and magnitude of gene action for grain yield and its ... more The effect of cropping system on the nature and magnitude of gene action for grain yield and its component traits was assessed in the parents and progeny of a diallel cross in soybean grown both as a sole crop and with maize. Greater expression of yield components and higher seed yield occurred in sole cropping than in intercropping. There were strong progenies × cropping system interactions for different traits. Cropping system had a large influence on the genetic control of yield and its components. Both additive (tr 2) and non-additive (try) genetic variances were important in the genetic determination of seed yield and its components. However, the ratio oftr2A to tr 2 was greater under monoculture than under intercropping for all the traits except harvest index and 100-seed weight where it increased, thereby indicating that cropping systems influence the genetic control of important yield components. Further, the occurrence of low genotypic correlations for yield and its components across and cropping systems justify the selection of different parents and crosses for sole and intercropped soybeans.
Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at ht... more Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/23/4-1-3/3 The 23rd International Grassland Congress (Sustainable use of Grassland Resources for Forage Production, Biodiversity and Environmental Protection) took place in New Delhi, India from November 20 through November 24, 2015. Proceedings Editors: M. M. Roy, D. R. Malaviya, V. K. Yadav, Tejveer Singh, R. P. Sah, D. Vijay, and A. Radhakrishna Published by Range Management Society of India
This paper studies the product [Formula: see text] of the binomial coefficients in the [Formula: ... more This paper studies the product [Formula: see text] of the binomial coefficients in the [Formula: see text]th row of Pascal’s triangle, which equals the reciprocal of the product of all the reduced and unreduced Farey fractions of order [Formula: see text]. It studies its size as a real number, measured by [Formula: see text], and its prime factorization, measured by the order of divisibility [Formula: see text] by a fixed prime [Formula: see text], each viewed as a function of [Formula: see text]. It derives three formulas for [Formula: see text], two of which relate it to base [Formula: see text] radix expansions of integers up to [Formula: see text], and which display different facets of its behavior. These formulas are used to determine the maximal growth rate of each [Formula: see text] and to explain structure of the fluctuations of these functions. It also defines analogous functions [Formula: see text] for all integer bases [Formula: see text] using base [Formula: see text] r...
Environmental Science and Pollution Research, 2016
Pinus gerardiana is considered an important species in dry temperate forests of North-Western Ind... more Pinus gerardiana is considered an important species in dry temperate forests of North-Western Indian Himalaya because of its influence on ecological processes and economic dependence of local people in the region. But, large numbers of biotic and abiotic factors have affected P. gerardiana in these forests; hence, there is a crucial need to understand the regeneration dynamics of this tree species. The present investigation was conducted in P. gerardiana forests to understand vegetation pattern and regeneration processes on different sites in the region. Statistical analysis was performed to know variability in growing stock and regeneration on sample plots, while correlation coefficients and regression models were developed to find the relationship between regeneration and site factors. The vegetation study showed dominance of P. gerardiana, which is followed by Cedrus deodara, Pinus wallichiana and Quercus ilex in the region. The growing stock of P. gerardiana showed steep increasing and then steadily declining trend from lower to higher diameter class. The distribution of seedling, sapling, pole and trees was not uniform at different sites and less number of plots in each site were observed to have effective conditions for continuous regeneration, but mostly showed extremely limited regeneration. Regeneration success ranging from 8.44 to 15.93 % was recorded in different sites of the region, which suggests that in different sites regeneration success is influenced by collection of cone for extracting seed, grazing/browsing and physico-chemical properties of soil. Regeneration success showed significant correlation and relationship with most of abiotic and biotic factors. The regeneration success is lower than the requirement of sustainable forest, but varies widely among sites in dry temperate forests of Himalaya. More forest surveys are required to understand the conditions necessary for greater success of P. gerardiana in the region.
ABSTRACT Pinus gerardiana Wall. is an important eco- logical and economic forestry species having... more ABSTRACT Pinus gerardiana Wall. is an important eco- logical and economic forestry species having restricted distribution in India. It has been observed that natural regeneration of the species is extremely poor or entirely lacking. This species has erratic and infrequent seed years and dormancy related problems that also reduce regeneration process in natural habitats. Therefore, different treatments of gibberellic acid and temperature were tried to enhance the germination in the species by subjecting seeds to two gibberellic acid concentrations (75 and 150 ppm) along with control, following four soaking periods (Control, 8, 16 and 24 h) and two incubation temperatures (15 and 25 oC) for assessing their impact on seed germination. It was observed that among different gibberellic acid concentrations highest germinability parameters were observed, when seeds were treated with 75 ppm GA3. Among different soaking periods highest germination was observed when seed were soaked for 24 h. The incubation temperature showed better results at 15 oC in comparison to 25 oC. The present study identified gibberellic acid treatment of 75 ppm, seed soaking for 24 h at 15 oC incubation temperature best treatment for enhancing germination.
Investigations were conducted on 58 Indian wheats for assessing the extent of genetic diversity f... more Investigations were conducted on 58 Indian wheats for assessing the extent of genetic diversity for leaf rust resistnace. Seedling studies of these wheats had indicated that the genetic basis of resistnace was due to 9 Lr genes while the adult plant resistance studies showed as many as 18 distinct groups. Seedling testings of these genotypes displayed the maximum preponderance of Lr26, Lr34, Lr13 and Lr23 genes and all of them have become susceptible to the newly evolved pathotypes of leaf rust barring Lr34. Therefore there was an urgent necessity to mobilize the highly effective resistance genes Lr9, Lr19, Lr24 and Lr28 in breeding programmes.. Lr34, partial adult plant resistance gene which is invariably associated with durable resistance, confers a high degree of adult plant resistance in combination with other seedling resistance genes in these studies. Therefore a data base of adult plant resistance sources must be characterised in terms of the number and the nature of resistan...
Provenance evaluation of bhimal (Grewia optia J R Drumm. ex Burret) was initiated in 1995 with re... more Provenance evaluation of bhimal (Grewia optia J R Drumm. ex Burret) was initiated in 1995 with respect to growth and productivity parameters for assessing genetic variations and identifying the most productive provenances which could be recommended in prevailing agroforestry systems. The materials comprised seven provenances of G. optiva collected from different locations of the northern states of Uttarakhand and Himachal Pradesh and planted in complete randomized block design with three replications. The data were recorded for growth and productivity parameters for 10 years. Significant variations were recorded for growth and productivity parameters. The highest fresh fodder productivity recorded in I C Malas 3.57 tonnes/ha, statistically at par with I C Bhaintan 3.49±0.04 tonnes/ha) was 1.21 times more than the least productive provenance I C Nauni. However, in respect of dry weight of debarked fuelwood and dry weight of bark fibre, I C Bhaintan produced 0.71 and 0.37 tonnes/ha bi...
Forty exotic genetic stocks of bread wheat were tested in glasshouse and isolated single race nur... more Forty exotic genetic stocks of bread wheat were tested in glasshouse and isolated single race nurseries against three pathotypes of race 77 and with mixture of pathotypes to observe their seedling and adult plant resistance to leaf rust. Twenty five genotypes showed adult plant resistance and significant genetic differences were detected to enable their grouping in 8 distinct classes. Fifteen genetic stocks depicted seedling resistance at the seedling and adult plant stages when tested against race. 77-5 and were placed in three distinct groups. The study indicated that adequate variability for seedling and adult plant resistance to leaf rust exists in these germplasm accessions when tested against native pathotypes of leaf rust.
The present studies were undertaken with a view to assess the genetic diversity for different mor... more The present studies were undertaken with a view to assess the genetic diversity for different morphophysiological traits and yield and yield components in barnyard millet. Clustering patterns of genotypes by different methods suggested that there was considerable genetic diversity among the lines. On the basis of D2 analysis, 18 genotypes could be grouped into eight clusters. Two genotypes viz. KE90 (Cluster V) and PRB 9402 (Cluster VIII) embodied the genes for earliness and higher yields, respectively and a hybridization programme between them can throw early maturing and high yielding segregants.
India produces around 19.0 million tonnes of tomatoes annually, which is insufficient to meet the... more India produces around 19.0 million tonnes of tomatoes annually, which is insufficient to meet the ever-increasing demand. A big gap of tomato productivity (72.14 t ha–1) between India (24.66 t ha–1) and the USA (96.8 t ha–1) exist, which can be bridged by integrating trellis system of shoot training, shoot pruning, liquid fertilizers, farmyard manure, and mulching technologies. Therefore, the present experiment was conducted on tomato (cv. Himsona) during 2019–2020 at farmers' fields to improve tomato productivity and quality. There were five treatments laid in a randomized block design (RBD) with three replications; T1 [Farmer practice on the flatbed with RDF @ N120:P60:K60 + FYM @6.0 t ha−1 without mulch], T2 [T1 + Polythene mulch (50 microns)], T3 [Tomato plants grown on the raised bed with polythene mulch + FYM @ 8.0 t ha−1 + Single shoot trellis system + Side shoot pruning + Liquid Fertilizer (LF1—N19:P19:K19) @ 2.0 g l–1 for vegetative growth + Liquid Fertilizer (LF2—N0: P...
A field experiment was undertaken to identify profitable land use based on productivity, net pres... more A field experiment was undertaken to identify profitable land use based on productivity, net present value, biomass and carbon stocks in litchi based land uses (LBLUs) during 1995–2015 established on degraded riverbed lands of western Himalaya, India. Results of LBLUs (20 years) revealed that LCT + LH + LPG land use produced 6.10–25.27%, 5.82–14.92% and 3.45–13.62% more fruit yield, 14.61–25.22%, 10.18–16.38% and 9.10–16.62% more total biomass, 2.95–9.51%, 0.03–4.54% and 1.60–8.26% higher carbon in soil and 6.93–14.76%, 4.60–10.03% and 6.29–13.14% more total carbon stocks as compared to sole litchi land use of 1st, 2nd and 3rd phase, respectively. Similarly, 80.39% and 78.56% more NPV, 11.74% and 19.77% higher BCR with shortest payback period (5 years) were realized in LCT + LH + LPG land use for 20 and 50 years, respectively. Sensitivity analysis also revealed that changes in discount rate will not affect its performance ranking.
International Journal of Intellectual Property Management, 2014
ABSTRACT The study was conducted to monitor the trend of patenting activity in agriculture sector... more ABSTRACT The study was conducted to monitor the trend of patenting activity in agriculture sector during 2005 to 2012 in India based on 3,718 published patent applications and 1,041 granted patents of the Indian Patent Office weblink, IPAIRS Version 2.0. There was gradual increase in patenting activity during 2005 to 2012 in different sectors of agriculture. Maximum percentage of patent applications were filed in biocides, pest repellants or attractants and plant growth regulators (60%), followed by new plants or processes for obtaining them (9.35%), animal husbandry, silk rearing or breeding new animal breeds (7.48%) and horticulture, cultivation, forestry (5.91%). Diversification in Indian agriculture was also noticeable during the period 2005 to 2012 as dairy products and animal husbandry registered 19.0 and 5.78 times increase in patenting activity over the period 1995-2004 besides development of new plants and processes (10.87 times) and horticulture and cultivation forestry rising (5.87 times). Public sector organisations and companies sector must forge public-private partnerships to address the R&D gaps and generate technologies at affordable prices in the field of agriculture to the stakeholders in the developing countries in the backdrop of product patent regime.
ABSTRACT Grewia optiva Drummond is one of important agroforestry tree species grown by the farmer... more ABSTRACT Grewia optiva Drummond is one of important agroforestry tree species grown by the farmers in the lower and mid-hills of western Himalaya. Different models viz., monomolicular, logistic, gompetz, allometric, rechards, chapman and linear were fitted to the relationship between total biomass and diameter at breast height (DBH) as independent variable. The adjusted R2 values were more than 0.924 for all the seven models implying that all models are apparently equally efficient. Out of the six non-linear models, allometric model (Y = a 9 DBHb) fulfils the validation criterion to the best possible extent and is thus considered as best performing. Biomass in different tree components was fitted to allometric models using DBH as explanatory variable, the adjusted R2 for fitted functions varied from 0.872 to 0.965 for different biomass components. The t values for all the components were found non-significant (p[0.05), thereby indicating that model is valid. Using the developed model, the estimated total biomass varied from 6.62 Mg ha-1 in 4 year to 46.64 Mg ha-1 in 23 year old plantation. MAI in biomass varied from 1.66–2.05 Mg ha-1 yr-1. The total biomass carbon stocks varied from 1.99 Mg ha-1 in 4 year to 15.27 Mg ha-1 in 23 year old plantation. Rate of carbon sequestration varied from 0.63–0.81 Mg ha-1 yr-1. Carbon storage in the soil up to 30 cm soil depth varied from 25.4 to 33.6 Mg ha-1.
Harsh Mehtat & Kumud Ranjan Sarkar Division of Genetics, Indian Agricultural Research Institute, ... more Harsh Mehtat & Kumud Ranjan Sarkar Division of Genetics, Indian Agricultural Research Institute, New Delhi-110012, India; 'Present address: Assistant Professor of Genetics, Department of Plant Breeding and Genetics, HPKV, Palampur-176062, HP, India
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