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Science 17 August 1973:
Vol. 181. no. 4100, pp. 667 - 668
DOI: 10.1126/science.181.4100.667
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Articles

Viability versus Fecundity Selection in the Slender Wild Oat, Avena barbata L

M. T. Clegg 1 and R. W. Allard 1

1 Department of Genetics, University of California, Davis 95616

Estimates of relative selective values of different genotypes in natural populations of predominantly self-pollinated plants have consistently shown a net heterozygote advantage. Heterozygote advantage is further analyzed in the present study by estimating components of selective values corresponding approximately to viability and fecundity. The results show that a higher proportion of heterozygotes than of homozygotes survive from seeding to adult stages and that this viability selection accounts for the overall excess of heterozygotes.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Strength and tempo of directional selection in the wild.
H. E. Hoekstra, J. M. Hoekstra, D. Berrigan, S. N. Vignieri, A. Hoang, C. E. Hill, P. Beerli, and J. G. Kingsolver (2001)
PNAS 98, 9157-9160
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Science. ISSN 0036-8075 (print), 1095-9203 (online)