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Associations between quantitative traits and enzyme loci in the F2 population of a maize hybrid

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Summary

Univariate and multivariate analyses were used to identify associations between eight enzyme marker loci and 11 quantitative traits of maize (Zea mays L.). The material analyzed included inbred lines Wf9 and Pa405, single-cross hybrid Wf9 X Pa405, and the F2 generation of the selfed single-cross hybrid. Each enzyme locus assayed was associated with at least one quantitative trait, and all quantitative traits were associated with genotypes at particular enzyme loci. Significant associations also were found between the level of heterozygosity per individual and nine of 11 quantitative traits. The total contribution to heterosis, for seed yield per plant, of genes linked with the eight enzyme loci, was 27% of the F2 mean and 18% of the difference in mean between the F1 hybrid and the inbred parents. Genes linked with Glu1 accounted for nearly one third of the total dominance effect detected by the eight enzyme loci. The chromosome segments marked by loci with significant effects on seed yield were markedly overdominant. The large heterotic effects of chromosome segments marked by particular loci suggest that enzyme loci could be used to help transfer genes responsible for heterosis to inbred lines. We conclude that analyses of additional inbred lines, F1 hybrids, and F2 populations in more environments will halp identify specific associations between enzyme loci, or chromosome segments which they mark, and important agronomic traits.

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Authors and Affiliations

  1. USDA, ARS (Oilseeds and Cereals Research Unit, SDSU), Northern Grain Insects Research Laboratory, R.R. 3, 57006, Brookings, SD, USA

    A. L. Kahler

  2. Institute of Animal Resource Ecology, University of British Columbia, 2204 Main Mall, V6T 1W5, Vancouver, B.C., Canada

    C. F. Wehrhahn

Authors
  1. A. L. Kahler
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  2. C. F. Wehrhahn
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Communicated by H. F. Linskens

Cooperative investigations of the USDA, ARS and Dept. of Plant Sciences, South Dakota State Univ. (SDSU), Brookings, Journal Series No. 2039; and the Institute of Animal Resource Ecology, Univ. of British Columbia, Vancouver, B.C. V6T 1W5, Canada

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Kahler, A.L., Wehrhahn, C.F. Associations between quantitative traits and enzyme loci in the F2 population of a maize hybrid. Theoret. Appl. Genetics 72, 15–26 (1986). https://doi.org/10.1007/BF00261448

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  • DOI: https://doi.org/10.1007/BF00261448

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