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Titolo:
A model for the evolution of high frequencies of males in an androdioecious plant based on a cross-compatibility advantage of males
Autore:
Vassiliadis, C; Valero, M; Saumitou-Laprade, P; Godelle, B;
Indirizzi:
Univ Lille 1, ESA CNRS 8016, Lab Genet & Evolut Populat Vegetales, F-59655Villeneuve Dascq, France Univ Lille 1 Villeneuve Dascq France F-59655 655Villeneuve Dascq, France Univ Paris Sud, Lab Evolut & Systemat Vegetaux, Orsay, France Univ Paris Sud Orsay France b Evolut & Systemat Vegetaux, Orsay, France
Titolo Testata:
HEREDITY
fascicolo: 5, volume: 85, anno: 2000,
pagine: 413 - 422
SICI:
0018-067X(200011)85:5<413:AMFTEO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
DATISCA-GLOMERATA; MERCURIALIS-ANNUA; SEX DETERMINATION; FLOWERING PLANT; FUNCTIONAL ANDRODIOECY; MAINTENANCE; GYNODIOECY; OLEACEAE; RATIOS; METAPOPULATION;
Keywords:
androdioecy; evolution; female-sterility; reproduction; self-incompatibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Valero, M Univ Lille 1, ESA CNRS 8016, Lab Genet & Evolut Populat Vegetales, Bat SN2, F-59655 Villeneuve Dascq, France Univ Lille 1 Bat SN2 Villeneuve Dascq France F-59655 cq, France
Citazione:
C. Vassiliadis et al., "A model for the evolution of high frequencies of males in an androdioecious plant based on a cross-compatibility advantage of males", HEREDITY, 85(5), 2000, pp. 413-422

Abstract

Lloyd's (1975) and Charlesworth & Charlesworth's (1978) phenotypic selection models for the maintenance of androdioecy predict that males (female-sterile individuals) must have an advantage in fertility (K) of at least two in order to invade a hermaphroditic population, and that their equilibrium frequency (x(eq) = (K - 2)/2(K - 1)) is always less than 0.5. In this paper,we develop a model in which male fertility is frequency-dependent, a situation not investigated in the previous models, to explore the conditions under which a high frequency of males (i.e. more than 50%) could be maintainedat equilibrium. We demonstrate that a gametophytic self-incompatibility (GSI) locus linked to a nuclear sex determination locus can favour rare alleles through male function, by causing frequency-dependent selection. Thus, the spread of a female-sterility allele in a hermaphroditic population may be induced. In contrast with the previous models, our model can explain malefrequencies greater than 50% in a functionally androdioecious species, as long as there is (i) dominance of female-sterility at the sex locus, and (ii) a few alleles at the self-incompatibility locus, even if the advantage in fertility of male phenotype is lower than two.

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Documento generato il 04/07/20 alle ore 19:54:49