Combining Ability and Heterosis for Yield and Related Traits in Chili (Capsicum annuum L.)
Swapan Chakrabarty1, A. K. M. Aminul Islam1, *, M. A. Khaleque Mian1, Tofayel Ahamed2
1 Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur 1706, Bangladesh
2 Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
An experiment was conducted to study combining ability and heterosis for yield and related traits in chili during November 2015 to September 2017.
Materials and Methods:
The experimental material consisted of six parents and their fifteen F1’s developed by half diallel mating design. Analysis of variance for combining ability exhibited significant General and Specific Combining Ability (GCA and SCA) effects for all the characters studied.
The SCA variance was higher than GCA variance for all the traits except ten fresh fruit weight, fruit length and fruit width indicating the predominance of non-additive type of gene action. The parents P1 and P6 were identified as the best general combiners and the hybrids P1×P6, P1×P4 and P2×P5 were identified as the best specific combinations for fresh fruit yield per plant and related traits. The hybrids P1×P6, P1×P4 and P3×P6 showed significant average heterosis and heterobeltiosis for fresh fruit yield per plant and its related traits. (H1/D)0.5 ratio indicated partial dominance effect of genes for all the traits.
Therefore, it may be possible to take advantages of better heterotic effects to be fixed in the later generations to facilitate further selection and best specific combinations for development of the hybrid variety of chili which can help to increase the total production in Bangladesh.
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* Address correspondence to this author at the Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur 1706, Bangladesh; Email: firstname.lastname@example.org