Genetic variability in Muscari comosum (Liliaceae). III. Enzyme polymorphism in European and Canarian populations
[EN] Electrophoretic variation at six loci from 33 European and Canarian populations of Muscari comosum (Liliaceae) were studied. Only GDH was monomorphic, being polymorphic the remaining loci (GOT-1, GOT-2, GOT-3, IDH and ADH). Although apparently the populations are differentiated, such as showed...
| Authors: | , , |
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| Format: | article |
| Publication Date: | 1988 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/13034 |
| Online Access: | http://hdl.handle.net/10261/13034 |
| Access Level: | Open access |
| Keyword: | Muscari comosum Enzyme polymorphism Plant population Adaptive factors |
| Summary: | [EN] Electrophoretic variation at six loci from 33 European and Canarian populations of Muscari comosum (Liliaceae) were studied. Only GDH was monomorphic, being polymorphic the remaining loci (GOT-1, GOT-2, GOT-3, IDH and ADH). Although apparently the populations are differentiated, such as showed the values of chi-square of heterogeneity, the values of genetic identity and the Fst indicate that this heterogeneity is only moderated. The most likely explanations of this result could be related to the biological characteristics (sexual reproduction, predominantly outcrossing with mechanism of pollination by insects, widespread geographic range)joint with other factors additionally related to life history of the species, such as the plastic response to the environment, and the high longevity. Furthermore the analysis with F-statistics shows that there is a deficit of heterozygotes for four loci (GOT-1, GOT-2, GOT-3- and IDH) and this explained by partial self-pollination, Wahlund effect or consanguineous mating, among other factors. However this analysis shows a clear excess of heterozygotes at the ADH locus. Although many reasons could cause an excess heterozygotes (negative assortive mating, differences in allele frequencies between male and female gamete pools) we think that this obervation can be explained by selection. |
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