کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9142971 1164371 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mitochondrial diversity of Opsariichthys bidens (Teleostei, Cyprinidae) in three Chinese drainages
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Mitochondrial diversity of Opsariichthys bidens (Teleostei, Cyprinidae) in three Chinese drainages
چکیده انگلیسی
We describe the phylogeographic structure of 28 Chinese populations of the cyprinid Opsariichthys bidens across three main Chinese river drainages. Our study is based on the phylogenetic analysis of the complete mitochondrial cytochrome b gene (1140 bp). We combined this analysis with population processes inferred from nested clade analysis (NCA) and mismatch distributions. Both analyses showed that Chinese O. bidens consists of five mtDNA lineages (Opsariichthys 1-5) with high genetic divergence among them. Molecular divergences (TrN + G) higher than 20% among the Opsariichthys 1-5 mtDNA lineages suggest a taxonomic underestimation at the species level. About 92% of the genetic variance among samples was explained by differences among Opsariichthys mtDNA lineages. Drainage-restricted haplotypes with high frequencies and moderate nucleotide diversity show that Opsariichthys populations have evolved independently. NCA results were congruent with the phylogeny, and unimodal mismatch distributions with negative Tajima's D values suggest population expansions in some Opsariichthys lineages. The phylogeographic structure of the Opsariichthys 1-5 mtDNA lineages appears to be related to their long-term interruption of gene flow (θST > 0.97). Our results suggested that fragmentation of ancestral ranges might have caused Opsariichthys diversification in Chinese waters. However, current distribution of common haplotypes across the Yangtze and Pearl drainages suggests a recent river connection that could have favoured gene flow across drainages. Overall, the results indicated that the richness of current Asian widespread species might have been underestimated, and that the cyprinid populations of O. bidens in the Yangtze, Pearl and Hai He drainages may correspond to five species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Phylogenetics and Evolution - Volume 37, Issue 3, December 2005, Pages 920-927
نویسندگان
, , ,