Molecular and chromosomal phylogeny in the obscura group of Drosophila inferred from sequences of the rp49 gene region

被引:43
|
作者
Ramos-Onsins, S [1 ]
Segarra, C [1 ]
Rozas, J [1 ]
Aguade, M [1 ]
机构
[1] Univ Barcelona, Fac Biol, Dept Genet, Barcelona, Spain
关键词
Drosophila; obscura group; molecular phylogeny; rp49 gene region; chromosomal inversions;
D O I
10.1006/mpev.1997.0438
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A region of approximately 1.6 kb encompassing the ribosomal protein 49 gene (rp49) has been sequenced and compared in nine species of the obscura group of Drosophila: four species belonging to the obscura subgroup, three to the pseudoobscura subgroup, and two to the affinis subgroup. Our data provide strong support that the Nearctic species (pseudoobscura and affinis subgroups) are monophyletic and place D. bifasciata with the other species of the obscura subgroup. Nucleotide sequence information at the rp49 gene region (located very close to one of the breakpoints of inversion O-3) has also been used to infer the phylogeny of the O chromosome in the subobscura species cluster. Analysis based both on parsimony-informative sites and on genetic distances confirms that the O-3 gene arrangement, present in D. guanche (together with inversion g) and in D. madeirensis, is ancestral to gene arrangements O3+4 and O-st present in extant populations of D. subobscura. (C) 1998 Academic Press.
引用
收藏
页码:33 / 41
页数:9
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