Estimates of outcrossing rates in Lathyrus latifolius populations

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1991 English Publisher:Canadian Science PublishingJournal:Genome, volume 34, pages 988-992 (issn: 0831-2796, eissn: 1480-3321,

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Authors: Mary Jo W. Godt; J. L. Hamrick;

doi: 10.1139/g91-152

Estimates of outcrossing rates in Lathyrus latifolius populations

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Abstract

Isozyme markers were used to estimate parameters of the mating system of Lathyrus latifolius, a bumblebee-pollinated legume. Multilocus outcrossing estimates (mean tm = 0.807; range = 0.702–0.870) differed significantly from random outcrossing. Comparisons of single-locus outcrossing estimates (mean ts = 0.756; range = 0.627–0.852) and multilocus estimates suggested that biparental inbreeding contributed about 21% to the apparent rate of selfing. Significant heterogeneity in outcrossing rates occurred among the seven populations studied. A tendency for selection against inbred individuals, or heterozygote advantage, was apparent in all populations.Key words: mating system, Lathyrus latifolius, outcrossing rate, isozymes, Leguminosae.

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