Heterosis and combining ability analysis for grain yield and quality traits in bread wheat(Triticum aestivum L.)

  • C. S. Desale And D. R. Mehta
Keywords: Bread wheat, Heterobeltiosis, Standard heterosis, grain yield.

Abstract

Heterosis and combining ability analysis were studied in a 10 × 10 diallel set of bread wheat. Significant heterobeltiosis and standard heterosis was observed in HW-5018 x HI-1544for grain yield per plant, harvest index, total soluble sugar and non-reducing sugar. Cross RAJ-4136 x UAS-281 showed significant heterobeltiosis for grain yield per plant, total soluble sugar, reducing sugar and non-reducing sugar as well as significant standard heterosis for grain yield per plant, harvest index, chlorophyll content, total soluble sugar and non-reducing sugar. Analysis of variance for combining ability revealed that the mean squares due to both general combining ability(GCA) and specific combining ability(SCA) were significant for all traits indicating both additive and non-additive genetic variances played a vital role in inheritance of all these traits. The ratio between GCA and SCA variatnce was less than unity for all the traits which indicated that non-additive component play relatively greater role in inheritance of all eight traits. On the basis of GCA, SCA effects and per se performance, parents HI-1544 for all the traits except biological yield per plant and reducing sugar and HW-5018 for all the traits except biological yield per plant and chlorophyll content and two crosses namely HW-5018 x HI-1544 andRAJ-4136 x UAS-281 for four traits were found as good general and specific combiners, respectively.
Published
30-09-2013
Section
Research Article