Vegetos

Abstract

Combining ability effects were deter mine for grain yield, protein content, beta caro tene, chlorophyll content and canopy tempera ture depression in 8 durum wheat parents and their 28 (except reciprocal) crosses designed through the diallel crossing pattern along with two checks viz.; PDW-233 and HD-2009. All the entries were grown in Randomized Block Design having three replications during rabi-2012-13 at the Field Experimentation Centre of the Depart ment of Genetics and Plant Breeding, Sam Hig ginbottom Institute of Agriculture, Technology and Sciences, Allahabad. Results depicted by gene action and combining ability effects high lights that both additive and non additive gene effects were important in governing the expres sion of studied traits.

The parents viz., PDW-300, RAJ-1555 and RAJ-6560 depicted highest general combin ing ability (GCA) for grain yield. Whereas, high est positive specific combining ability (SCA) ef fects were shown by hybrids PDW-300×HI-8653, RAJ-6560×HI-8653 for grain yield per plant; PDW-300× NIDW-295, DBP-01-11×DBP-01-12 for beta carotene; PDW-300×NIDW-295, PDW 300×DBP-01-12, AKDW-2997-16× RAJ-1555 for protein content; AKDW-2997-16 × RAJ-6560 for chlorophyll content and cross PDW-300×HI 8653 for canopy temperature depression. The information regarding GCA effects of the parent and SCA affects associated with interaction ef fects ultimately improve the yield, physiological and quality traits.