Genetic Structure in a Heterocyanic Population of Trillium sessile (Liliaceae)
| Autor: | Lucy E. Tyrrell, Richard Whitkus, Donald H. Les, Finley A. Bryan |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
education.field_of_study
Ecology biology Liliaceae fungi Population food and beverages Plant Science biology.organism_classification Trillium Genetic divergence Genetic drift Polymorphism (computer science) Evolutionary biology Genetic structure Botany Subgenus education Ecology Evolution Behavior and Systematics |
| Zdroj: | Plant Species Biology. 2:67-73 |
| ISSN: | 1442-1984 0913-557X |
| DOI: | 10.1111/j.1442-1984.1987.tb00033.x |
| Popis: | Species of Trillium in the subgenus Phyllantherum are either polymorphic for flower color, or monomorphic for flower color and related to a polymorphic species. This leads to the suggestion that polymorphic species may be the progenitors for monomorphic ones. For this to be true, it must be demonstrated that genetic divergence among flower morphs can occur within polymorphic populations. Genetic structure was assessed in a population of T. sessile that contains a polymorphism for flower color. A survey of 11 enzyme systems using starch gel electrophoresis revealed three polymorphic loci: 6PGD-1, AAT-1 and AAT-2. Analysis of large and small scale spatial structure, stage classes, and flower color classes revealed significant genetic divergence in all instances. Spatial structure in the population is likely a result of genetic neighborhoods which can maintain populational variation via random genetic drift. Genetic divergence of the yellow flower color morph was probably initiated through genetic drift since the morph occurs in low frequencies. The results imply that the initial genetic divergence of species in the subgenus can arise within polymorphic populations. |
| Databáze: | OpenAIRE |
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