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Combining ability analysis in maize under normal and high temperature conditions.

Author(s)
Muhammad Akbar Wheat Research Institute, Ayub Agricultural Research Institute (AARI), Faisalabad, Pakistan
Muhammad Saleem Department of Plant Breeding & Genetics, University of Agriculture, Faisalabad, Pakistan
Faqir Muhammad Azhar Department of Plant Breeding & Genetics, University of Agriculture, Faisalabad, Pakistan
M. Yasin Arshad Department of Plant Breeding & Genetics, University of Agriculture, Faisalabad, Pakistan
Rashid Ahmad Department of Plant Breeding & Genetics, University of Agriculture, Faisalabad, Pakistan
Abstract
F1 generation of 6x6 diallel cross of maize (Zea mays) was evaluated for combining ability effects under normal and high temperature conditions in the Department of Plant Breeding and Genetics, University of Agriculture Faisalabad during 2005-06. The mean squares due to genotypes, GCA, SCA and reciprocal effects were found as highly significant except non–significant to GCA effect for 100-grain weight under high temperature condition. The GCA/ SCA variance ratio exhibited that all traits were predominantly under non-additive control. The inbred line 935006 was found as the best general combiner with better mean performance for all traits under both temperatures followed by R2304-2 and F 165-2-4. The best cross was cross 935006 x R 2304-2 and its reciprocal followed by F 165-2-4 x R 2304-2, F 165-2-4 x 935006 and R 2205.5-4 x R 2304-2 and their reciprocals. These crosses showed good positive SCA effects alongwith better mean performance for grain yield per plant and most of the traits under both temperature regimes.
Publication Details
Page(s) 27-38
DOI DOI not available
Published Journal: Journal of Agricultural Research, Volume: 46, Issue: 1, Year: 2008

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