Studies on combining ability for yield and it’s component traits in maize [Zea  mays (L.)]

PRAVEEN  R.  HOMBARADI; R. M.  KACHAPUR; S. I.  HARLAPUR

PRAVEEN R. HOMBARADI Department of Genetics and Plant Breeding, College of Agriculture, DharwadUniversity of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
R. M. KACHAPUR Department of Genetics and Plant Breeding, College of Agriculture, DharwadUniversity of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
S. I. HARLAPUR Department of Genetics and Plant Breeding, College of Agriculture, DharwadUniversity of Agricultural Sciences, Dharwad - 580 005, Karnataka, India

Keywords: Combining ability, Maize, Progeny, Testers

Abstract

The study was carried out to assess the general combining ability of the lines and specific combining ability ofthe hybrids, using line x tester mating design. 134 hybrids derived from mating two testers with sixty seven lines in L x Tdesign were evaluated during the kahrif, 2018-19. The ratio of 2 GCA/2 SCA was less than unity for all the charactersindicating preponderance of non-additive gene action. Among female lines GPM-726 was the best combiner for grain yield,and tester CML-451 was found to be the best general combiner for grain yield. Hybrids GH-17232, GH-17212, GH-17173,GH-17108 and GH-17105 recorded higher significant SCAeffects in positive direction for grain yield