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245	1	0	_aAntagonism between sexual and natural selection in experimental populations of Saccharomyces cerevisiae
490	0		_vEvolution, 59(10), p.2109, 2005
520	3		_aTrade-offs between life-history components are a central concept of evolution and ecology. Sexual and natural selection seem particularly apt to impose antagonistic selective pressures. When sex is not integrated into reproduction, as in Saccharomyces cerevisiae, natural selection can impair or even eliminate it. In this study, a genetic trade-off between the sexual and asexual phases of the yeast life cycle was suggested by sharp declines in the mating and sporulation abilities of unrelated genotypes that were propagated asexually in minimal growth medium and in mice. When sexual selection was applied to populations that had previously evolved asexually, sexual fitness increased but asexual fitness declined. No such negative correlation was observed when sexual selection was applied to an ancestral strain: sexual and asexual fitness both increased. Thus, evolutionary history affected the evolution of genetic correlations, as fitness increases in a population already well adapted to the environment were more likely to come at the expense of sexual functions.
650	1	4	_aADAPTATION
650	1	4	_aNATURAL SELECTION
650	1	4	_aPLEIOTROPY
650	1	4	_aSEXUAL SELECTION
650	1	4	_aTRADE-OFFS
650	1	4	_aYEAST
700	1	2	_aZeyl, C.
700	1	2	_aCurtin, C.
700	1	2	_aKarnap, K.
700	1	2	_aBeauchamp, E.
856	4	0	_uhttps://drive.google.com/file/d/1eOWIk1PyU_g-cFrxLacR4q1yXMuPgMXY/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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