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

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Science  17 Aug 1973:
Vol. 181, Issue 4100, pp. 667-668
DOI: 10.1126/science.181.4100.667


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.

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