Genetic Variability and Heritability in F4 Populations of Brassica napus L.
Genetic Variability and Heritability in F4 Populations of Brassica napus L.
Tahir Khan, Raziuddin, Fakharuddin* and Muazam Jamal Razi
ABSTRACT
An experiment was conducted to estimate genetic variability, heritability and genetic advance for important attributes in Brassica napus using 10 parental lines and their 21 F4 populations. Significant differences were observed among genotypes, parents, F4 populations and parents versus F4 populations for days to 50% flowering, days to maturity, plant height, primary branches plant-1 and main raceme length. Among parents, CA2, DH8, DH4, CA4 and DH6 performed better for different traits. Whereas among F4 populations, cross combinations CA5 × DH8, CA2 × DH7, CA2 × DH8, CA5 × DH7, CA4 × DH7 and CA4 × DH8 performed better. Plant height and main raceme length displayed moderate to high broad sense heritability and maximum genetic advance for most of the F4 populations. Current results suggested the effectiveness of selection in early generations for the improvement of these traits.
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