Do chromosomal hybrids necessarily suffer from developmental instability? - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Biological Journal of the Linnean Society Année : 2006

Do chromosomal hybrids necessarily suffer from developmental instability?

Résumé

The role of chromosomal rearrangements in disturbing reproduction in hybrids between karyotypically differentiated groups is fairly well documented. However, the effect of chromosomal changes at other phenotypic levels is rarely considered. In Tunisia, natural chromosomal hybrids of the house mouse exhibit developmental instability, suggesting that a high karyotypic heterozygosity might also affect developmental processes. If this is true, we predict that, in this species, developmental instability should arise in hybrids between any populations with a high chromosomal differentiation. To test this hypothesis, we compare the results obtained in Tunisian mice with those obtained in the present analysis on Madeiran mice. Both systems of races have similar levels of chromosomal differentiation (nine Robertsonian fusions). Unlike Tunisian mice, hybrids in Madeira display a similar level of developmental instability as parental groups. This indicates that structural heterozygosity per se does not necessarily impair developmental stability. It further suggests that chromosomal fusions are not all equivalent in their phenotypic effects, and that the identity of each fusion should be taken into account.

Dates et versions

halsde-00300018 , version 1 (17-07-2008)

Identifiants

Citer

Elodie Gazave, Josette Catalan, Maria da Graca Ramalhinho, Maria da Luz Mathias, Ana Claudia Nunes, et al.. Do chromosomal hybrids necessarily suffer from developmental instability?. Biological Journal of the Linnean Society, 2006, 88, pp.33-43. ⟨10.1111/j.1095-8312.2006.00600.x⟩. ⟨halsde-00300018⟩
112 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More