Heterosis analysis for yield and yield attributed traits in Indian mustard [Brassica juncea (L.) Czern & Coss]
AbstractThe present investigation entitled “Identification of promising heterotic combinations for yield and yield attributed traits in Indian mustard [Brassica juncea (L.) Czern & Coss]” consists analysis of 15×15 half-diallel set of crosses in Indian mustard revealed that non-additive gene effects was found to be predominant for secondary branches per plant, whereas preponderance of additive gene effects for the inheritance of rest of the characters. The evaluation of heterosis revealed that PRB-2004-3-4×PRE-2009-9(-9.627**), Bhaghirathi ×PRE-2009-9 (-16.53**), RGN-145×PR-2006-1(-4.64**) for early maturity, PRB-2008-5× PRB-2004-3-4 (-24.37**), PRB-2008-5×PRE-2009-9 (-24.89**), PRE-2009-9×NDYR-8 (-23.32**) for dwarf plant height, PR-2006-1×NDRE-4 (201.74**), PR-2006-1×NDYR-8 (137.26**), Maya×PRE-2004-3-4 (40.26**) for seed yield, PRE-2009-9×NDYR-8 (15.84**), RGN-74×PRE-2007-6 (2.91**), Maya×NDYR-8 (2.09**) for oil content, most promising were heterotic crosses for mid parent heterosis, better parent and economic heterosis respectively. All three type of heterosis with respect to over mid parent, better parent and standard check were observed significant in desirable direction for all the characters except glucosinolate content. The manifestation of high amount of heterosis for seed yield and component traits by a large number of crosses suggesting need to maintain heterozygosity in the population for maximum expression of traits in desirable direction. Foregoing results and inferences revealed that the presence of wide spectrum of exploitable variability in research material studied with respect to various quantitative traits projecting, thereby, immense scope for genetic improvement in Indian mustard. Therefore, with the help of heterosis studies, the superior cross combination of promising hybrids could be identified for developing high yielding cultivars.
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