National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The nature and magnitude of gene action was analyzed using six generation mean for seed yield and its attributes in three inter-varietal crosses of urdbean. A perusal of generation mean analysis (GMA) indicated that a simple additive-dominance model was inadequate and an epistatic model had to be assumed as seen from the significance of scaling tests. Further the GMA revealed that seed yield and its component traits were influenced by different types of gene action viz., additive, dominance and epistatic interactions, cheifly of dominance x dominance and duplicate dominant types. Hence, improvement of these traits is impossible with simple selection techniques, as they are unable to fix in superior lines. Therefore, deferment in selection of superior lines to later generations is practised in pedigree method of breeding to make it effective. However to harness epistatic interactions, one or two cycles of recurrent selection followed by pedigree breeding method would be effective and useful to identify superior lines with high yield and yield components.
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