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Natural selection of UDP genotypes in an experimental population of Lolium perenne (Poaceae)
Author(s) -
RaineyForeman Daphne,
Mitton Jeffry B.
Publication year - 1995
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1995.tb15693.x
Subject(s) - biology , glucose 6 phosphate isomerase , lolium perenne , genotype , population , phosphoglucomutase , locus (genetics) , lolium , genetics , poaceae , allele , genetic variability , botany , gene , enzyme , demography , sociology , biochemistry
The mating system determines the range of genotypes on which selection will act. Ultimately, the population will contain only those genotypes that can survive in the current environment. This study was conducted to determine the extent to which selection affects genotype at four enzyme loci in Lolium perenne . Starch gel electrophoresis was used to determine genotype at the phosphoglucomutase, 6‐phosphogluconate dehydrogenase, phosphoglucose isomerase , and UDP‐glucose pyrophosphorylase loci. Genotypes of progeny arrays were used to infer maternal genotype in a field‐grown population of plants. A mating system analysis was performed on maternal and progeny plants of the field population and also on a population of plants, from the same seed stock, grown in a greenhouse environment. Allelic frequencies differed among populations at the Udp locus. Results indicate that high mortality in the field strongly favored one allele. Assumptions of the mating system model are examined and used to interpret the observed differentiation among populations.