A total of 120 locally collected accessions of Brassica napus, Brassica juncea and Brassica rapa ... more A total of 120 locally collected accessions of Brassica napus, Brassica juncea and Brassica rapa were evaluated for two years and three different locations of the country to check the level of stability among these accessions for various fatty acids composition. Combined stability analysis of variance for two years and three locations showed significant genetic variation within brassica accessions for all the fatty acids profile. Season x location, genotype x season, genotypes x locations and genotypes x season x locations were highly significant for all the studied parameters, while the values recorded for regression coefficient (b) and deviation from the regression (S 2 d) also showed high amount of variations. From the observed results, some accessions which produce the values near to the stranded values were recommended for further studies in future breeding programmes.
This study was conducted in Brassica juncea L. for the determination of good combiners for qualit... more This study was conducted in Brassica juncea L. for the determination of good combiners for quality associated traits using 8 x 8 diallel during 2004 - 2005 and 2005 - 2006. Analysis of variance revealed highly significant differences (p 0.01) for all the studied traits. Components of combining ability analysis showed that general combining ability (GCA) was highly significant (p 0.01) for oil percentage (%) and glucosinolates (iMolg-1) whereas the rest were non-significant. Specific combining ability (SCA) effects were highly significant for all traits except for oleic acids. Reciprocal combining ability (RCA) effects were highly significant (p 0.01) for all traits except for oleic acid which was significant at (p 0.05). The SCA effects were higher than RCA for oil %. The GCA effects were of greater magnitude than the SCA effects for glucosinolate, erucic acid and protein content. The parental genotypes NUM009, NUM123, NUM105 and NUM117 and their hybrids NUM009x NUM123, NUM10...
Abstract: The present study was conducted to assess the magnitude of genetic variability in maize... more Abstract: The present study was conducted to assess the magnitude of genetic variability in maize genotypes for yield and yield components under agro climatic conditions of Peshawar valley. The experiment was conducted at NWFP Agricultural University Peshawar, during ...
Journal of Food, Agriculture and Environment, 2013
A diallel analysis of F 1 crosses involving six upland cotton genotypes to evaluate the populatio... more A diallel analysis of F 1 crosses involving six upland cotton genotypes to evaluate the population’s genetic potential, and genetic effects involved in the inheritance of yield and yield contributing traits was conducted during 2009 and 2010 at the University of Agriculture, Peshawar, Pakistan. The adequacy of the additive-dominance model was fully adequate for plant height and partially suitable for other variables. Larger values of dominance (H 1 , H 2 ) than additive (D) genetic components of variation showed that traits were primarily governed by non-additive gene action. Unequal proportions of positive (U) and negative (V) alleles in loci (H 2 <H 1 ) with asymmetrical distribution of genes was observed in the parents (H 2 / 4H 1 <0.25 and F was different from zero) for all the variables. The ratio of H 2 /4H 1 was below than maximum value (0.25) for all variables, which arises when U=V=0.5 over all loci. Broad sense heritabilities were higher; however, most of the variables manifested desirable medium narrow sense heritabilities with perceptible genetic gain. Negative correlation between Wr + Vr and parental means (y) for plant height, bolls plant -1 , boll weight and lint %, and positive correlation for seed cotton yield, indicated that parents containing dominant and recessive genes, respectively were responsible for their increased mean values. The F 1 hybrids of cultivars CIM-473, CIM-554, CIM-506 viz., CIM-473 × CIM-554, CIM-506 × CIM-554, CIM554 × CIM-707 and their reciprocals showed best performance for seed cotton yield and its contributing variables. These F 1 hybrids could be used for hybrid cotton; however, the desirable narrow sense heritability indicates that selection would be effective in early segregating generations.
A total of 120 locally collected accessions of Brassica napus, Brassica juncea and Brassica rapa ... more A total of 120 locally collected accessions of Brassica napus, Brassica juncea and Brassica rapa were evaluated for two years and three different locations of the country to check the level of stability among these accessions for various fatty acids composition. Combined stability analysis of variance for two years and three locations showed significant genetic variation within brassica accessions for all the fatty acids profile. Season x location, genotype x season, genotypes x locations and genotypes x season x locations were highly significant for all the studied parameters, while the values recorded for regression coefficient (b) and deviation from the regression (S 2 d) also showed high amount of variations. From the observed results, some accessions which produce the values near to the stranded values were recommended for further studies in future breeding programmes.
This study was conducted in Brassica juncea L. for the determination of good combiners for qualit... more This study was conducted in Brassica juncea L. for the determination of good combiners for quality associated traits using 8 x 8 diallel during 2004 - 2005 and 2005 - 2006. Analysis of variance revealed highly significant differences (p 0.01) for all the studied traits. Components of combining ability analysis showed that general combining ability (GCA) was highly significant (p 0.01) for oil percentage (%) and glucosinolates (iMolg-1) whereas the rest were non-significant. Specific combining ability (SCA) effects were highly significant for all traits except for oleic acids. Reciprocal combining ability (RCA) effects were highly significant (p 0.01) for all traits except for oleic acid which was significant at (p 0.05). The SCA effects were higher than RCA for oil %. The GCA effects were of greater magnitude than the SCA effects for glucosinolate, erucic acid and protein content. The parental genotypes NUM009, NUM123, NUM105 and NUM117 and their hybrids NUM009x NUM123, NUM10...
Abstract: The present study was conducted to assess the magnitude of genetic variability in maize... more Abstract: The present study was conducted to assess the magnitude of genetic variability in maize genotypes for yield and yield components under agro climatic conditions of Peshawar valley. The experiment was conducted at NWFP Agricultural University Peshawar, during ...
Journal of Food, Agriculture and Environment, 2013
A diallel analysis of F 1 crosses involving six upland cotton genotypes to evaluate the populatio... more A diallel analysis of F 1 crosses involving six upland cotton genotypes to evaluate the population’s genetic potential, and genetic effects involved in the inheritance of yield and yield contributing traits was conducted during 2009 and 2010 at the University of Agriculture, Peshawar, Pakistan. The adequacy of the additive-dominance model was fully adequate for plant height and partially suitable for other variables. Larger values of dominance (H 1 , H 2 ) than additive (D) genetic components of variation showed that traits were primarily governed by non-additive gene action. Unequal proportions of positive (U) and negative (V) alleles in loci (H 2 <H 1 ) with asymmetrical distribution of genes was observed in the parents (H 2 / 4H 1 <0.25 and F was different from zero) for all the variables. The ratio of H 2 /4H 1 was below than maximum value (0.25) for all variables, which arises when U=V=0.5 over all loci. Broad sense heritabilities were higher; however, most of the variables manifested desirable medium narrow sense heritabilities with perceptible genetic gain. Negative correlation between Wr + Vr and parental means (y) for plant height, bolls plant -1 , boll weight and lint %, and positive correlation for seed cotton yield, indicated that parents containing dominant and recessive genes, respectively were responsible for their increased mean values. The F 1 hybrids of cultivars CIM-473, CIM-554, CIM-506 viz., CIM-473 × CIM-554, CIM-506 × CIM-554, CIM554 × CIM-707 and their reciprocals showed best performance for seed cotton yield and its contributing variables. These F 1 hybrids could be used for hybrid cotton; however, the desirable narrow sense heritability indicates that selection would be effective in early segregating generations.
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