Heterosis, combining ability and inbreeding depression in chickpea (Cicer arietinum L.)
2013
Chauhan, V. S. | Dodiya, N.S. | Parihar, A.K.
The F₁ and F₂ progenies of a six –parent diallel cross (excluding reciprocals) of chickpea were analyzed for heterosis, combining ability and Inbreeding depression for quantitative and quality traits. The results indicated significant differences among the parents for general combining ability (gca) and crosses for specific combining ability (sca) for all the characters studied except number of grains per pod in F₂’s. However, the sca component of variance was predominant indicating the predominance of nonadditive gene effects forthe traits studied. Among the parents IPC-94-19, IPC-97-72 and MPJG-2000-108 were good general combiner for yield per plant and its attributing traits. IPC-94-94 was the best general combiner for protein content. Crosses KWR-108 X DCP-92-3, KWR-108XICP-97-72 and IPC-94-19 X IPC-94-94 were the best specific combiner for grain yield. The most specific cross for protein contentwas DCP-92-3 X MPJG2000-108. Three best F₂’s which exhibited highest magnitude of positive sca effects for grain yield per plant were viz., IPC-94-19 x DCP-92-3, DCP-92-3x MPJG2000-108 and DCP-92-3 x IPC-94-94. Estimates of inbreeding depression revealed that six F₂’s showed significant negative inbreeding depression for grain yield. To ensure further increases in grain yield along with high protein content, combination of desirable yield components is advocated. The F₁ hybrids showing high sca and parents having good gca will be included into chickpea improvement breeding programme for further improvement of grain yield in chickpea.
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