Speciation processes constitute a praincipal engine in the evolution of organisms. Allopatric isolation of same-species populations or intraspecific choromosome mutations facilitates ecological, behavioural and genetic differentation among populations. The aim of this project is to analyse the effect that geographic isolation and Robertsonian translocations have on intrapopulational evolutionary divergence in rodents, thus driving specific speciation processes. The first situation will becarried out in the snow vole, Chionomys nivalis, a high mountain rock-dweling vole whose populations show an extreme spatial isolation. Firstly, mate choice processes and the ecological contex under they take place will be examined. Alterwads, differences in sexual behaviour and mating signals preferrences among individuals from three isolated populations will be analysed. The study of the effect of mutation on the speciation processwill be carried out in the hybrid zone that appears between two cromosomical races of the house mouse, Mus musculus, the standard race (2n=40) and the Barcelona race (2n=26). The degree of reproductive isolation between both races will be determined through several estimulates of the fertility of the hybrids. The effect of hybridization on the developmental stability of the hybrids will be investigated by means of analyses of fluctuant assymetry and geometric morphometrics.
|Effective start/end date||19/12/00 → 19/12/03|