International Journal of Enviornment and Climate Change, Dec 15, 2023
An experiment was carried out to evaluate genetic variability and determine the correlation betwe... more An experiment was carried out to evaluate genetic variability and determine the correlation between grain yield and its component traits in 150 rice recombinant inbred lines, their parents and six checks at ICAR-IIRR, Hyderabad and AHRS, Kathalagere in wet 2022. The experiments were laid
Climate resilience is the most concentrated subject in the current scenario for rice improvement.... more Climate resilience is the most concentrated subject in the current scenario for rice improvement. The aerobic system of rice cultivation involving direct seeding with need-based irrigation in non-puddled soil is gaining ground with respect to a current scenario of water scarcity. The selection of lines suitable and stable under aerobic along with irrigated conditions without any yield penalty is one of the focus areas of the breeding programme for resource use efficiency. In the present study, we have screened a panel of 118 rice lines under aerobic i.e. limited water conditions and irrigated conditions at ARS Dhadesugur Karnataka to identify ideal selection indices viz. STI, TOL, SSI, YSI, YR, YI, PYR, MP and GMP for selecting the best high-yielding and stable lines under both rice cultivation methods. The deployment of selection indices here only pertains to finding the differences in yield per plant under aerobic and irrigated conditions. According to the results of multivariate ...
International Journal of Environment and Climate Change
Rice lines need to be grown and evaluated for yield under different agro-ecological locations to ... more Rice lines need to be grown and evaluated for yield under different agro-ecological locations to identify stable and high-yielding lines for deployment in breeding programs. With this aim, a set of rice germplasm was evaluated for G×E in four different environments (E1-Dadesuguru-Wet 2020, E2-ICAR–IIRR-Dry 2019, E3-ICAR–IIRR-Wet 2020, E4-ICAR–IIRR-Dry 2020). The experimental trial was laid out in a randomized complete block (RCB) design with three replications at each location for 118 rice lines. Data on yield per plant was analyzed using the Additive Main Effect and Multiplicative Interaction (AMMI) and Genotype, and Genotype × Environment Interaction (GGE) models. The combined analysis of variance (ANOVA) manifested significant variations for tested genotypes, locations, years, genotype × year, and genotype × location interactions revealing the influence of environmental factors on yield traits. All four environments showed discrimination power, whereas E2 and E3 were found as the...
International Journal of Bio-resource and Stress Management
The bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Xoo) is an economicall... more The bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Xoo) is an economically important and one of the most destructive disease of rice in both irrigated and rainfed environments in Asia. In particular, in recent years, the occurrence of abnormal climate and warming phenomena has produced a good environment for bacterial leaf blight. The rice yield continues to decrease, causing 30 to 50% yield loss. Since bacterial pathogen is difficult to manage by other means effectively, developing host plant resistance is the most effective way to control this disease. So, the study was carried out during rain-fed season (July–November 2019) at Agricultural Research Station (ARS) Gangavati, Karnataka, India to identify the bacterial leaf blight resistance reaction among 22 medium slender genotypes of rice by both phenotyping and genotyping by using molecular markers linked with resistance governing bacterial leaf blight genes. Alongside TN-1 was used as susceptible check an...
International Journal of Enviornment and Climate Change, Mar 31, 2022
Medium slender grain varieties of rice are one of the most preferred among the south Indian rice ... more Medium slender grain varieties of rice are one of the most preferred among the south Indian rice consumers and has a high demand in both national as well as international markets. In the study, 18 medium slender rice genotypes were examined along with four individual checks in Karnataka across four different locations to assess genetic stability using additive main effects and multiplicative interaction (AMMI) model and GGE bi-plot methodology. The genotype environment interaction (G×E interaction) were partitioned into two principal components and were found highly significant. Together, IPCA1 and IPCA2 explained more than 75 percent of G×E interactions for yield trait, with IPCA I explaining maximum G×E interaction. Gangavati and Malnoor were found to be favorable environments. AMMI analysis indicated that the BPT mutant 1801, BPT mutant 1804 and BPT mutant 1811 were found to be most stable genotypes for grain yield across locations over check GGV-05-01. Among rice genotypes, the best elite genotype, BPT mutant 1801 recorded highest grain yield and was also the most stable in grain yield across four locations.
International Journal of Enviornment and Climate Change, Dec 15, 2023
An experiment was carried out to evaluate genetic variability and determine the correlation betwe... more An experiment was carried out to evaluate genetic variability and determine the correlation between grain yield and its component traits in 150 rice recombinant inbred lines, their parents and six checks at ICAR-IIRR, Hyderabad and AHRS, Kathalagere in wet 2022. The experiments were laid
Climate resilience is the most concentrated subject in the current scenario for rice improvement.... more Climate resilience is the most concentrated subject in the current scenario for rice improvement. The aerobic system of rice cultivation involving direct seeding with need-based irrigation in non-puddled soil is gaining ground with respect to a current scenario of water scarcity. The selection of lines suitable and stable under aerobic along with irrigated conditions without any yield penalty is one of the focus areas of the breeding programme for resource use efficiency. In the present study, we have screened a panel of 118 rice lines under aerobic i.e. limited water conditions and irrigated conditions at ARS Dhadesugur Karnataka to identify ideal selection indices viz. STI, TOL, SSI, YSI, YR, YI, PYR, MP and GMP for selecting the best high-yielding and stable lines under both rice cultivation methods. The deployment of selection indices here only pertains to finding the differences in yield per plant under aerobic and irrigated conditions. According to the results of multivariate ...
International Journal of Environment and Climate Change
Rice lines need to be grown and evaluated for yield under different agro-ecological locations to ... more Rice lines need to be grown and evaluated for yield under different agro-ecological locations to identify stable and high-yielding lines for deployment in breeding programs. With this aim, a set of rice germplasm was evaluated for G×E in four different environments (E1-Dadesuguru-Wet 2020, E2-ICAR–IIRR-Dry 2019, E3-ICAR–IIRR-Wet 2020, E4-ICAR–IIRR-Dry 2020). The experimental trial was laid out in a randomized complete block (RCB) design with three replications at each location for 118 rice lines. Data on yield per plant was analyzed using the Additive Main Effect and Multiplicative Interaction (AMMI) and Genotype, and Genotype × Environment Interaction (GGE) models. The combined analysis of variance (ANOVA) manifested significant variations for tested genotypes, locations, years, genotype × year, and genotype × location interactions revealing the influence of environmental factors on yield traits. All four environments showed discrimination power, whereas E2 and E3 were found as the...
International Journal of Bio-resource and Stress Management
The bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Xoo) is an economicall... more The bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Xoo) is an economically important and one of the most destructive disease of rice in both irrigated and rainfed environments in Asia. In particular, in recent years, the occurrence of abnormal climate and warming phenomena has produced a good environment for bacterial leaf blight. The rice yield continues to decrease, causing 30 to 50% yield loss. Since bacterial pathogen is difficult to manage by other means effectively, developing host plant resistance is the most effective way to control this disease. So, the study was carried out during rain-fed season (July–November 2019) at Agricultural Research Station (ARS) Gangavati, Karnataka, India to identify the bacterial leaf blight resistance reaction among 22 medium slender genotypes of rice by both phenotyping and genotyping by using molecular markers linked with resistance governing bacterial leaf blight genes. Alongside TN-1 was used as susceptible check an...
International Journal of Enviornment and Climate Change, Mar 31, 2022
Medium slender grain varieties of rice are one of the most preferred among the south Indian rice ... more Medium slender grain varieties of rice are one of the most preferred among the south Indian rice consumers and has a high demand in both national as well as international markets. In the study, 18 medium slender rice genotypes were examined along with four individual checks in Karnataka across four different locations to assess genetic stability using additive main effects and multiplicative interaction (AMMI) model and GGE bi-plot methodology. The genotype environment interaction (G×E interaction) were partitioned into two principal components and were found highly significant. Together, IPCA1 and IPCA2 explained more than 75 percent of G×E interactions for yield trait, with IPCA I explaining maximum G×E interaction. Gangavati and Malnoor were found to be favorable environments. AMMI analysis indicated that the BPT mutant 1801, BPT mutant 1804 and BPT mutant 1811 were found to be most stable genotypes for grain yield across locations over check GGV-05-01. Among rice genotypes, the best elite genotype, BPT mutant 1801 recorded highest grain yield and was also the most stable in grain yield across four locations.
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Papers by Vishal Reddy