Phylogenetic relationships and the primitive X chromosome inferred from chromosomal and satellite DNA analysis in Bovidae.

ABSTRACT: The early phylogeny of the 137 species in the Bovidae family is difficult to resolve; knowledge of the evolution and relationships of the tribes would facilitate comparative mapping, understanding chromosomal evolution patterns and perhaps assist breeding and domestication strategies. We found that the study of the presence and organization of two repetitive DNA satellite sequences (the clone pOaKB9 from sheep, a member of the 1.714 satellite I family and the pBtKB5, a 1.715 satellite I clone from cattle) on the X and autosomal chromosomes by in situ hybridization to chromosomes from 15 species of seven tribes, was informative. The results support a consistent phylogeny, suggesting that the primitive form of the X chromosome is acrocentric, and has satellite I sequences at its centromere.

SUBMITTER: Chaves R 

PROVIDER: S-EPMC1559903 | biostudies-literature | 2005 Oct

REPOSITORIES: biostudies-literature