Cytogénétique desMusAfricains du Sous-GenreLeggada. Etude de 35 Exemplaires Provenant de L'Afrique du Sud, de la Côte D'Ivoire et du Gabon

Abstract

SUMMARY1. The author who in his precedent papers has studied 72 specimens of African pigmy- mice (Mus, subgenus Leggada) gives the results of the cytogenetical analysis of 35 individuals from South-Africa, Coast of Ivory and Gaboun.2. South-Africa. — In the vicinity of Kirkwood, two subspecies of M. minutoides are living together, M. m. minutoides (2 n = 18) and M. m. indutus (2 n = 36). These both forms have been considered as species in statu nascendi resulting from the splitting of a polymorphic robertsonian system (MATTHEY 1964 a et b). By M. m. minutoides the heterozygoty of an autosomic pair, consisting in one metacentric and two acrocentrics, previously observed by a single ♀, was met again by another ♀. A pericentric inversion, detected previously by a single ♂, by which a pair was represented by a metacentric and an acrocentric, has been found again by five ♂ ♂. It is very likely that these both chromosomic mutations affect respectively the third and the sixth pair of autosomes.3. Coast of Ivory....