Causes of negative correlations between grain yield and grain protein concentration in common wheat |
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| Authors: | Solomon Kibite L E Evans |
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| Institution: | (1) Department of Plant Science, University of Alberta, T6G 2P5 Edmonton, Alberta, Canada;(2) Department of Plant Science, University of Manitoba, R3T 2N2 Winnipeg, Manitoba, Canada |
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| Abstract: | Summary In a study designed to investigate the nature and basis of the relationships between grain yield (GY) and grain protein concentration (GBC) in common wheat, 11 populations, including 4 homozygous-homogeneous and 7 heterozygous-heterogeneous populations, were evaluated in a space planted and a solid seeded trial. Analysis of yield and protein data from each population revealed that phenotypic and environmental correlations between GY and GPC were negative and highly significant, whereas genetic correlation was significant in only one of 7 segregating populations studied. These results suggested that the inverse relationships between GY and GPC, although phenotypically real, were not caused by genetic factors. It would appear that environmental factors, source-sink interactions, and dilution of protein by non-protein compounds were the major agents that caused undesirable associations between the two traits.Contribution No. of the Department of Plant Science, University of Alberta, Edmonton, Alberta, Canada T6G2P5 |
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| Keywords: | Trictium aestivum common wheat protein content genetic correlations environmental correlations |
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