Abstract            Volume:9  Issue-8  Year-2021         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

This study was carried out on the molecular diversity and identification of heterotic cross combination for seed yield and its related characters in soybean genotypes, Glycine max (L.) Merrill using SNP markers. The aim of the study was to assess the genetic diversity among the soybean genotypes based on SNP markers and to obtain information on the combining abilities of parents and the crosses and the gene actions involved in the expression in the various soybean yield contributing characters. The field experiment was laid out in a randomized complete block design (RCBD) with three replications. The result showed that mean square due to general combining ability (GCA) were highly significant for all the characters except Plant Height at Flowering and Number of Branches per Plant whereas in specific combining ability(SCA), the mean square was found significant in Days to Flowering, Plant Height at Flowering, Days to Maturity, Plant Height at maturity and Number of Seeds per Pod. Significant mean squares recorded in these characters indicated the importance of the additive and dominance gene effects in the expression and the inheritance of the characters. The GCA/ SCA ratio are more than unity for all the characters studied indicating that the additive genetic effect played an important role in the inheritance of the characters. Moreover, the promising general combiners were found in parents TGx 1990- 37F; TGx 1989-21F and TGx 1830 – 20E for Seed yield along with some other yield components. The promising hybrids were found in crosses TGx 1990 – 3F x TGx 1990 – 57F; TGx 1990- 37F x TGx 1830 – 20 E and TGx 1990- 37F x TGx 1990 – 57F for Seed Yield Plant along with some other yield components. At the molecular level, SNP markers were used to assess the extent of polymorphism among the F2 populations and the markers showed remarkable genetic diversity among the soybean genotypes.

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