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 |
To ascertain combining ability and genetic variance of thirteen quantitative characters by evaluating forty hybrids developed by line x tester mating design using ten females and four males in pigeonpea. Analysis of variance for combining ability revealed that variance due to parents (ó2 gca) were found significant for majority of the traits under study except seed yield per plant and variance due to hybrids (ó2 sca) were found significant for all the traits under study, which indicates the presence of both additive and non additive gene action. A perusal of variance ratio (ó2gca / ó2sca) was less than unity suggested the preponderance of non additive genetic variance for all the characters except days to maturity. Based on estimates of general combining ability effects for various characters, the five parents were CMS GT 1603 A, CMS GT 1616 A, CMS GT 288 A, CMS GT 307 A and GTR 97 were found good general combiners for seed yield and its contributing traits. Therefore these parents were noted as good source of favourable genes for increasing seed yield through various yield contributing characters. The estimates of SCA effects revealed that out of forty hybrids, twelve hybrids registered significant positive SCA effects for seed yield per plant. The best five hybrids on the basis of significant positive SCA effects for seed yield per plant were CMS GT 288 A x GTR 55, CMS GT 1616 A x GTR 55, CMS GT 1002 A x GTR 97, CMS GT 1402 A x GTR 18 and CMS GT 1602 A x GTR 23. On the basis of mean performance and specific combining ability for seed yield per plant and its component traits the hybrid CMS GT 288 A x GTR 55 was found most promising. Therefore it needs to be exploited in future breeding programme of pigeonpea.
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