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 analysed using six generations viz., P1, P2, F1, F2, BC1 and BC2 for yield and yield contributing characters in four inter varietal crosses of okra. The scaling and joint scaling tests indicated the presence of epistatic gene effect for all the characters in four crosses. Duplicate epistasis was predominant in most of the yield and yield attributing characters in all the four crosses except number of fruits per plant, which showed complimentary epistasis. Study of gene action revealed that both additive and non-additive components of genetic variations were found important for the inheritance of fruit yield and its attributes. However, fixable components of genetic variation i.e., Additive gene effects with additive x additive interactions for yield contributing traits i.e. fruit length and number of fruits per plant in all crosses except HB-25-2 x HB-32, for fruit diameter in all crosses except HB-40 x HB-27 and for fruit weight in crosses Hisar Naveen x Varsha Uphar and HB-25-2 x HB-32 were found significant. These traits in these crosses can be improved through pedigree method. The rest of the characters in respective cross combinations showed additive and non-additive type of gene effects. These traits would be possible to improve by either recurrent selection or bi-parental mating system in segregating generations followed by selection. Further, all the three types of gene actions viz., additive (d), dominance (h) and epistatic gene effects [additive x additive (i), additive x dominance (j) and dominance x dominance (l)] were involved in the inheritance of number of fruits per plant in the crosses HB-25-2 x HB-32 and HB-1157 x Pusa Sawani.
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