Genetic Analysis of Grain Quality and Yield Traits in Speciality Genotypes of Rabi Sorghum [Sorghum bicolor (L.) Moench]
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Date
2016-07
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University of Agricultural Sciences, Dharwad
Abstract
Genetics of the grain quality and yield traits in speciality genotypes of rabi sorghum was studied using six generations (P1, P2, F1, F2, BC1P1 and BC1P2) of two crosses M 35-1 × KMJ-1 (pop-sorghum) and M 35-1 × RSJ-1 (hurda purpose), and four generations (P1, P2, F1 and F2) of two crosses M 35-1 × AKJ-1 (flaking purpose) and M 35-1 × SMJ-1 (hurda purpose) that were evaluated during Rabi 2015 at RARS, Vijayapur.
Inheritance of grain quality traits was studied in F2 populations. Seed size in crosses M 35-1 x KMJ-1 and M 35-1 x SMJ-1 is under the control of two genes with polymeric gene interaction; seed colour in M 35-1 x AKJ-1 and M 35-1 x SMJ-1 by two genes with dominant epistasis and duplicate dominant epistasis, respectively; seed shape in M 35-1 x KMJ-1 and M 35-1 x AKJ-1, two genes with dominant duplicate epistatic gene interaction; shrunken seed shape in M 35-1 x SMJ-1 was due to recessive gene action and xenia effect was observed.
Generation mean analysis revealed that in M 35-1 × KMJ-1 non-additive gene action attributed to days to 50% flowering, panicle length, grain yield per plant, additive gene action for 100 seed weight, fodder yield, popping yield and flake size, over dominance gene action for panicle weight and epistatic gene action for expansion ratio. In M 35-1 × RSJ-1, non-additive gene action played predominant role in governing days to 50% flowering, panicle length, panicle breadth and 100 seed weight, additive for fodder yield per plant and additive × dominance gene interactions for panicle weight and grain yield per plant. The estimates, genetic components and correlations were obtained.
AKJ-1 recorded highest polyphenol content and low amylose : amylopectin ratio, SMJ-1 with highest sugar content (roasted and matured seeds) compared to M 35-1.