| Autor: |
Weixing Tang, Yifeng Chen |
| Zdroj: |
Zoological Science (Zoological Society of Japan); May2012, Vol. 29 Issue 5, p311-318, 8p |
| Abstrakt: |
Hybridization with introduced fish species is an important threat to native fish species. Here we investigated hybridization between native barbless carp (Cyprinus pellegrini) and introduced com mon carp (C. carpio) in Xingyun Lake in the Yunnan-Guizhou plateau of China. A total of 203 indi viduals of Cyprinus from Xingyun Lake were studied by combination of morphological and genetic analyses. Most individuals were strictly intermediate between the two parental species in morphol ogy, strongly suggesting that extensive hybridization has occurred. Bayesian model-based cluster ing of the genetic data suggests that there are two distinct genetic groups corresponding to barbless and common carp respectively. Many individuals in the two genetic groups showed inter mediate morphology, suggesting that both groups actually contain massively introgressed genes. Only two individuals were identified as barbless carp both morphologically and genetically, hinting that this native species is at risk of genetic extinction in Xingyun Lake. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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