RETRACTED: Darwinian selection on a selfing locus.
The shift to self-pollination is one of the most prevalent evolutionary transitions in flowering plants. In the selfing plant Arabidopsis thaliana, pseudogenes at the SCR and SRK self-incompatibility loci are believed to underlie the evolution of self-fertilization. Positive directional selection has driven the evolutionary fixation of pseudogene alleles of SCR, leading to substantially reduced nucleotide variation. Coalescent simulations indicate that this adaptive event may have occurred very recently and is possibly associated with the post-Pleistocene expansion of A. thaliana from glacial refugia. This suggests that ancillary morphological innovations associated with self-pollination can evolve rapidly after the inactivation of the self-incompatibility response.
Shimizu
Kentaro K
KK
Department of Genetics, North Carolina State University, Box 7614, Raleigh, NC 27695, USA.
Cork
Jennifer M
JM
Caicedo
Ana L
AL
Mays
Charlotte A
CA
Moore
Richard C
RC
Olsen
Kenneth M
KM
Ruzsa
Stephanie
S
Coop
Graham
G
Bustamante
Carlos D
CD
Awadalla
Philip
P
Purugganan
Michael D
MD
D000483:Alleles; D017360:Arabidopsis / Q000235:genetics* / Q000502:physiology*; D005075:Biological Evolution; D002874:Chromosome Mapping; D002980:Climate; D021901:DNA, Intergenic; D017343:Genes, Plant; D014644:Genetic Variation; D018745:Genome, Plant; D005843:Geography; D006239:Haplotypes; D016013:Likelihood Functions; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010802:Phylogeny; D010940:Plant Proteins; D011058:Pollen; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D011494:Protein Kinases / Q000235:genetics* / Q000502:physiology; D011544:Pseudogenes; D011995:Recombination, Genetic; D012641:Selection, Genetic; D013995:Time
D021901:DNA, Intergenic; D010940:Plant Proteins; D011494:Protein Kinases; C079832:S-receptor kinase