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Genetics, evolution, and adaptive significance of the selfing syndrome in the genus Capsella.
- Source :
-
The Plant cell [Plant Cell] 2011 Sep; Vol. 23 (9), pp. 3156-71. Date of Electronic Publication: 2011 Sep 27. - Publication Year :
- 2011
-
Abstract
- The change from outbreeding to selfing is one of the most frequent evolutionary transitions in flowering plants. It is often accompanied by characteristic morphological and functional changes to the flowers (the selfing syndrome), including reduced flower size and opening. Little is known about the developmental and genetic basis of the selfing syndrome, as well as its adaptive significance. Here, we address these issues using the two closely related species Capsella grandiflora (the ancestral outbreeder) and red shepherd's purse (Capsella rubella, the derived selfer). In C. rubella, petal size has been decreased by shortening the period of proliferative growth. Using interspecific recombinant inbred lines, we show that differences in petal size and flower opening between the two species each have a complex genetic basis involving allelic differences at multiple loci. An intraspecific cross within C. rubella suggests that flower size and opening have been decreased in the C. rubella lineage before its extensive geographical spread. Lastly, by generating plants that likely resemble the earliest ancestors of the C. rubella lineage, we provide evidence that evolution of the selfing syndrome was at least partly driven by selection for efficient self-pollination. Thus, our studies pave the way for a molecular dissection of selfing-syndrome evolution.
- Subjects :
- Alleles
Capsella growth & development
Chimera genetics
Chromosome Mapping
DNA, Plant genetics
Flowers anatomy & histology
Flowers genetics
Flowers growth & development
Geography
Quantitative Trait Loci
Sequence Analysis, DNA
Adaptation, Biological genetics
Biological Evolution
Capsella genetics
Pollination genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1532-298X
- Volume :
- 23
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- The Plant cell
- Publication Type :
- Academic Journal
- Accession number :
- 21954462
- Full Text :
- https://doi.org/10.1105/tpc.111.088237