National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Phenotypic screening during kharif 2015 and evaluation of Sub1 introgressed lines in Ranjit and Bahadur for submergence tolerance was done with the 35 genotypes. Out of 35 genotypes 32 were Sub1 introgressed BC2F3 lines (24 BC2F3 lines of the cross -Ranjit x Swarna-Sub1and 8 BC2F3 lines of the cross -Bahadur x Swarna-Sub1) with three parents i.e. Ranjit, Bahadur, and Swarna-Sub1. The phenotypic screening of genotypes showed that all Sub1 introgressed lines had significantly higher survival rates as compared with the original recipient parents whereas less change in plant height was observed. The Sub1 introgressed lines in BC2F3 generation showed lesser elongation during submergence as compared to the parents and the susceptible check IR42. The analysis of variance revealed the existence of significant variation among the genotypes for grain yield and all other morpho-physiological quantitative traits. High estimates of genotypic and phenotypic variation in case of morphological characters like stem thickness, panicle number per plant indicated that selection would be effective for these characters. Amongst all the morpho-physiological quantitative traits, high heritability (>80) with high genetic advance (>20) as percent of mean estimates were recorded for leaf length of blade, stem thickness, leaf width of blade, grain weight of 1000 fully developed grains and grain width. The high estimates of heritability for these characters also indicated considerable genetic variation and lower influence of environment in the expression of these characters. High genetic advance coupled with high heritability estimates indicates that these traits are apparently controlled by additive genes. Thus these traits deserve top most priority in selection.
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