volume 22 issue 4 (december 2002) : 287 - 288
COMBINING ABILITY EFFECTS VIS-A-VIS PER SE PERFORMANCE IN INDIAN MUSTARD {BRASSICA JUNCEA (L.) CZERN ANDCOSS}
1Division of Genetics,
Indian Agricultural Research. Institute, New Delhi - 110 012, India
ABSTRACT
Association between the per se performance and general combining ability effects was higher in F2 than in F1 generation which may be attributed to fixation of genes in F2. Correlation coefficients between per se performance and SCA effects in respect to various traits revealed greater correlation in F1 than in F2. It would clearly indicate that per se performance in F1 was attributable to dominance and dominance based interactions; while it was not so in F2 suggesting the fixation of the genes thereby accumulating additive genetic effects resulting into superior per se performance. Further, lack of correlation between the SCA effects of F1 and F2 clearly showed the non-fixable nature of SCA effects i.e. dominance and dominance based interactions.
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