Summary
Correlations between chiasma frequencies and population means and variances of 36 quantitative characters were calculated for seven populations of the predominantly selfing species Triticum longissimum and five populations of the outcrossing species Triticum speltoides. Significant negative correlations between the interstitial chiasma frequencies and both means and variances are found in the selfing species. This coincides with predictions from recent theoretical work concerning selection for degree of recombination. The positive correlations between some of the means and variances and the chiasma frequencies for the outcrosser are explained by the existence of supernumerary chromosomes which have been shown elsewhere to increase interstitial chiasma frequency.
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Research supported in part by National Institutes of Health Grant USPHS 10452-09-10.
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Hillel, J., Feldman, M. & Simchen, G. Mating systems and population structure in two closely related species of the wheat group. Heredity 31, 1–9 (1973). https://doi.org/10.1038/hdy.1973.55
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DOI: https://doi.org/10.1038/hdy.1973.55
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