Publication Date:
2004-12-18
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimizu, Kentaro K -- Cork, Jennifer M -- Caicedo, Ana L -- Mays, Charlotte A -- Moore, Richard C -- Olsen, Kenneth M -- Ruzsa, Stephanie -- Coop, Graham -- Bustamante, Carlos D -- Awadalla, Philip -- Purugganan, Michael D -- New York, N.Y. -- Science. 2004 Dec 17;306(5704):2081-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, North Carolina State University, Box 7614, Raleigh, NC 27695, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604405" target="_blank"〉PubMed〈/a〉
Keywords:
Alleles
;
Arabidopsis/*genetics/*physiology
;
Biological Evolution
;
Chromosome Mapping
;
Climate
;
DNA, Intergenic
;
*Genes, Plant
;
Genetic Variation
;
Genome, Plant
;
Geography
;
Haplotypes
;
Likelihood Functions
;
Molecular Sequence Data
;
Open Reading Frames
;
Phylogeny
;
Plant Proteins
;
Pollen
;
Polymorphism, Genetic
;
Polymorphism, Single Nucleotide
;
Protein Kinases/*genetics/physiology
;
*Pseudogenes
;
Recombination, Genetic
;
*Selection, Genetic
;
Time
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
