1Department of Plant Breeding and Genetics, C.S. Azad University of Agriculture & Technology, Kanpur, 208 002
*Department of Plant Breeding, Rajendra Agricultural University, Sabour campus, Bhagalpur-813210.
A diallel analysis with eight varieties of rice (Oryza sativa L.) revealed very poor manifestation of heterosis for kernel length, breadth and length: breadth ratio. The gene action appeared to be additive for kernel length but both additive and non-additive gene actions were found important for kernel-breadth and length: breadth ratio. 'CP 231′ and 'T 9′ were good general combiners for kernel length, breadth and length: breadth ratio. in general, a close association between per se performance and gca effects of parents was observed.
Oryza sativa, rice, heterosis, combining ability, diallel cross, kernel size
