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- Title
Molecular Evolution of theGapCGene Family inAmsinckia spectabilisPopulations That Differ in Outcrossing Rate.
- Authors
Pérusse, Joëlle R.; Schoen, Daniel J.
- Abstract
Molecular evolutionary analysis of the glyceraldehyde 3-phosphate dehydrogenase (GapC) gene family was conducted in the plant genusAmsinckia(Boraginaceae), a group that exhibits marked variation in the mating system.GapCgenes in this group differ from those ofArabidopsis thalianain terms of both intron size and number. Phylogenetic and Southern hybridization analyses suggest the presence of multipleGapCloci, each defined by a set of base substitutions that are in strong linkage disequilibrium. One species ofAmsinckia,A. spectabilis, was studied in some detail. This species consists of selfing (A. s. spectabilis) and outcrossing (A. s. microcarpa) varieties. Two selfing populations and one outcrossing population sample were analyzed in detail for variation at one of the members of this gene family,GapC3. A reduction in number ofGapC3haplotypes and level of genetic diversity was observed in the selfing populations ofA. spectabilis.GapC3in the outcrossing population (but not the two selfing populations) exhibited a significant departure from neutrality in the direction of an excess of singletons. These results are discussed in the context of forces acting on sequence evolution in populations with different mating systems.
- Subjects
ALDEHYDE dehydrogenase; MOLECULAR evolution; GENES; AMSINCKIA; ARABIDOPSIS thaliana; SOUTHERN blot
- Publication
Journal of Molecular Evolution, 2004, Vol 59, Issue 4, p427
- ISSN
0022-2844
- Publication type
Article
- DOI
10.1007/s00239-004-2623-x