Phylogeography and genetic relationships of North African Bufo mauritanicus Schlegel, 1841 estimated from mitochondrial DNA sequences

被引:0
|
作者
David James Harris
Ana Perera
机构
[1] Campus Agrário de Vairão,CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos
[2] Faculdade de Cięncias da Universidade do Porto,Departamento de Zoologia e Antropologia
来源
Biologia | 2009年 / 64卷
关键词
mitochondrial DNA; 12S rRNA; 16S rRNA; North Africa;
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中图分类号
学科分类号
摘要
Genetic variation within the North African toad Bufo mauritanicus was estimated by sequencing partial 12S rRNA and 16S rRNA mitochondrial regions from widespread populations in Morocco, Algeria and Tunisia. Unlike many other wide ranging species from this area, B. mauritanicus demonstrated very low levels of intraspecific variation. The minimal intraspecific genetic variation may be due to a relatively recent, possibly post-glacial, expansion into its current range. Further phylogeographic studies of other North African species are needed to assess if this is a common biogeographical phenomenon. Phylogenetic analyses support immunological data that B. mauritanicus is part of a clade of predominantly sub-Saharan Bufo, recently assigned to a new genus Amietophrynus. Two different lineages within this clade, B. mauritanicus and the B. pardalis group, appear to have reverted from 20 chromosomes to the more typical 22 chromosomes found in most other Bufonids. However, the alternative hypothesis that the Bufo species with 20 chromosomes form a monophyletic lineage cannot be rejected.
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页码:356 / 360
页数:4
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