Genetic Analysis for Development of Rice Hybrids for South Asia

Combining ability analysis revealed importance of non-additive gene action in the expression of various yield contributing characters.The results indicated that the UPR 3406-7-2-2 (L5 ) and UPR 3413-15-2-1 (L28 ) were the best general combiners among lines as evident from significant GCA effects for ten characters. The best heterotic hybrids, UPR 3434-6-2-1× UPRI 95167 (L32 × T1), UPRI 2008-5 × IR 58025A (L33× T2) and UPR 3528-8-1-2× UPRI 95167 (L36× T1) in normal conditions expressing higher SCA effects and per se performance, were also involved good/ good combining parents into them. The crosses, L32 × T1, L33× T2 and L36× T1 involving good/good combining parents were suggested to exploitation for isolating high yielding pure lines and/or for straight use in hybrid breeding. On the basis of spikelet fertility percent, indica lines were grouped as maintainer, restorer and partial restorer / maintainer lines. Among 50 indica lines only 3 lines (L31, L37 and L42) behave like a maintainer with both of CMS lines (IR 58025A and Pusa 6A),19 lines behave like a restorer with both of CMS (IR58025A and Pusa 6A) lines and rest behave like partial restorer / maintainer lines.

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Dr. Mohd Arif Khan Obtained his Ph.D.degree in Genetics & Plant Breeding from G.B.P.U.A.&T.Pantnagar in 2011. He received Gold medal in MSc Ag. and also fellowships during Ph.D., MSc Ag. and BSc Ag. At present he is working with one of the world top Biotechnology Companies. He is author of many research papers published in various journals.