Origin, fate, and architecture of ecologically relevant genetic variation.
Recent advances in molecular genetics combined with field manipulations are yielding new insight into the origin, evolutionary fate, and genetic architecture of phenotypic variation in natural plant populations, with two surprising implications for the evolution of plant genomes. First, genetic loci exhibiting antagonistic pleiotropy across natural environments appear rare relative to loci that are adaptive in one or more environments and neutral elsewhere. These 'conditionally neutral' alleles should sweep to fixation when they arise, yet genome comparisons find little evidence for such selective sweeps. Second, genes under biotic selection tend to be of larger effect than genes under abiotic selection. Recent theory suggests this may be a consequence of high gene flow among populations under selection for local adaptation.
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Related Subject Headings
- Selection, Genetic
- Plant Biology & Botany
- Genome, Plant
- Genetic Variation
- Ecology
- 3108 Plant biology
- 0607 Plant Biology
- 0605 Microbiology
- 0601 Biochemistry and Cell Biology
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Selection, Genetic
- Plant Biology & Botany
- Genome, Plant
- Genetic Variation
- Ecology
- 3108 Plant biology
- 0607 Plant Biology
- 0605 Microbiology
- 0601 Biochemistry and Cell Biology