期刊
JOURNAL OF EVOLUTIONARY BIOLOGY
卷 24, 期 11, 页码 2456-2472出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1420-9101.2011.02380.x
关键词
cytoplasmic male sterility; female advantage; gynodioecy; restoration of male fertility; sexual polymorphisms
资金
- French National Research Agency [ANR-06-JCJC-0074]
- CNRS/Nord-Pas-de-Calais Regional Council
- Agence Nationale de la Recherche (ANR) [ANR-06-JCJC-0074] Funding Source: Agence Nationale de la Recherche (ANR)
In gynodioecious species, in which hermaphroditic and female plants co-occur, the maintenance of sexual polymorphism relies on the genetic determination of sex and on the relative fitness of the different phenotypes. Flower production, components of male fitness (pollen quantity and pollen quality) and female fitness (fruit and seed set) were measured in gynodioecious Beta vulgaris spp. maritima, in which sex is determined by interactions between cytoplasmic male sterility (CMS) genes and nuclear restorers of male fertility. The results suggested that (i) female had a marginal advantage over hermaphrodites in terms of flower production only, (ii) restored CMS hermaphrodites (carrying both CMS genes and nuclear restorers) suffered a slight decrease in fruit production compared to non-CMS hermaphrodites and (iii) restored CMS hermaphrodites were poor pollen producers compared to non-CMS hermaphrodites, probably as a consequence of complex determination of restoration. These observations potentially have important consequences for the conditions of maintenance of sexual polymorphism in B. vulgaris and are discussed in the light of existing theory on evolutionary dynamics of gynodioecy.
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