Robertsonian house mouse populations in Tunisia: A karyological and biochemical study |
| |
Authors: | K Saïd T Jacquart C Montgelard H Sonjaya A N Helal J Britton-Davidian |
| |
Institution: | (1) Laboratoire de Génétique, U.S.T.L., Institut des Sciences de l'Evolution, U.A. 327, 34060 Montpellier Cédex, France;(2) Present address: Service de Biologie et Physiologie animale, Faculté de Pharmacie de Monastir, 5019 Monastir, Tunisie |
| |
Abstract: | A new population of Mus musculus domesticus showing Robertsonian translocations (2n = 22) has been identified in Tunisia.
Mice carried 9 pairs of Robertsonian translocations: Rb(1.11), Rb(2.16), Rb(3.12), Rb(4.6), Rb(5.14), Rb(7.18), Rb(8.9), Rb(10.17)
and Rb(13.15). Five of the nine translocations are not known to occur elsewhere. In two populations only 2n = 22 mice were
present, whereas in a third one a mixture of karyotypes (2n = 22, 38, 39, 40) was found. The slight electrophoretic differentiation
observed for other Robertsonian populations as well as the hybrid nature of the karyotypically heterogeneous populations are
confirmed. Allele frequency differences between the 2n = 22 and 2n = 40 mice in the latter population show that local electrophoretic
differentiation exists and allow to compare chromosome flow and gene flow. The presence of a chromosome-1 polymorphism for
additional fragments of heterochromatin present in the Robertsoman population provides a convenient marker of recombinational
events in the hybrid zone. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|