In certain cases, predicted by evolutionary theory of sex-allocation and confirmed by empirical evidence, animals adaptively change their progeny sex-ratio according to individual circumstances. Here we argue that a similar response of offspring sex-ratio must exist in relation to genetic variation of mothers' mitochondria, as a consequence of maternal inheritance of these organelles and of their influence on fitness resulting from their crucial role in metabolism. In fact, a mathematical analysis of evolutionary dynamics of sex-allocation mutants demonstrates that natural selection promotes an evolutionarily stable allocation policy where mothers with defective mitochondria generate only sons, while those with optimal mitochondria have female biased progenies.
|Titolo:||Mother’s mitochondria and optimal offspring sex ratio|
SAINO, NICOLA MICHELE FRANCESCO (Ultimo)
|Parole Chiave:||Biased sex-ratios; Deleterious mutations; Evolutionary stability; Mitochondrial mutations; Optimal sex-allocation|
|Settore Scientifico Disciplinare:||Settore BIO/07 - Ecologia|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||10.1016/S0040-5809(02)00059-X|
|Appare nelle tipologie:||01 - Articolo su periodico|