Journal article
S-RNases and sexual incompatibility: structure, functions, and evolutionary perspectives
Molecular phylogenetics and evolution, Vol.29(3), pp.490-506
2003
Handle:
https://hdl.handle.net/2376/104125
PMID: 14615188
Abstract
S-RNase-based gametophytic self-incompatibility appears to be the most phylogenetically widespread form of self-incompatibility found in the angiosperms, having been reported in the Solanaceae, Scrophulariaceae, and Rosaceae. This intraspecific breeding barrier is controlled by a single genetic locus termed
S. Rejection of self-pollen has been shown to be mediated in the pistil by a highly polymorphic series of ribonucleases, but as yet the pollen component of this recognition system has not been identified. Here we review our present knowledge concerning the structure, functions, and evolution of S-RNases and the
S-loci in which they reside. In addition we present two new phylogenetic analyses of S-RNases which suggest that (1) sequence variability between
S-alleles is spread across the whole gene and is not as clustered as is generally believed and (2) there is evidence of recombination and/or diversifying selection in two distinct regions of S-RNases. The implications of these findings are discussed.
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Details
- Title
- S-RNases and sexual incompatibility: structure, functions, and evolutionary perspectives
- Creators
- Eric H Roalson - School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USAAndrew G McCubbin - School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
- Publication Details
- Molecular phylogenetics and evolution, Vol.29(3), pp.490-506
- Academic Unit
- Biological Sciences, School of
- Publisher
- Elsevier Inc
- Identifiers
- 99900546960501842
- Language
- English
- Resource Type
- Journal article