Abstract
The effect of B chromosomes (Bs) on the mating system of a population of Secale cereale L. was studied. The population was formed with one half of the plants bearing Bs and the other half without Bs. Outcrossing rates were estimated by both a single-locus method and a multilocus method using allozyme loci as genetic markers. The rate of selfing in this population was high, close to 35 per cent, but there are differences between plants with and without Bs. While the subpopulation of plants with Bs showed a selfing rate close to 20 per cent, the subpopulation of plants without Bs reached a value of close to 45 per cent. Differences in allele frequencies at some loci between the two subpopulations of plants have been also observed. Our data reinforce the previously known effects of Bs in influencing mating system and the genetic structure of rye populations.
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Cruz-Pardilla, M., Vences, F., García, P. et al. The effect of B chromosomes on outcrossing rate in a population of rye, Secale cereale L.. Heredity 62, 319–325 (1989). https://doi.org/10.1038/hdy.1989.46
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DOI: https://doi.org/10.1038/hdy.1989.46
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