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Journal of Agronomy
Year: 2006  |  Volume: 5  |  Issue: 3  |  Page No.: 523 - 526

Combining Ability Analysis for Maturity and Other Traits in Rapeseed (Brassica napus L.)

Abdul Wahab Nassimi, Raziuddin, Sardar Ali, Ghulam Hassan and Naushad Ali    

Abstract: Combining ability analysis of eight Brassica napus L. genotypes was estimated using diallel crosses. Analysis of variance for genotypes revealed highly significant differences (p=<0.01) for all traits. Components of combining ability analysis exhibited that, GCA was highly significant (p=<0.01) for 50% flowering, number of primary branches/plant and number of pods main/raceme, while non-significant for maturity and plant height whereas SCA and RCA effects were highly significant for all traits. GCA effects were higher than SCA and RCA for majority of the traits indicating that additive gene effects controlled the expression of these traits. RCA effects were greater than GCA and SCA for maturity showing that reciprocal crosses have higher potential than direct crosses for this trait. The parent genotypes NUR1, NUR2, NUR4, NUR7 and NUR8 and hybrids NUR1 x NUR3, NUR2 x NUR3, NUR2 x NUR4, NUR2 x NUR8, NUR4 x NUR2, NUR7 x NUR1, NUR8 x NUR2, NUR8 x NUR3 and NUR9 x NUR4 had higher GCA and SCA effects, respectively therefore could be used to develop early maturing, medium height and high yielding lines.

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