Detection of hybridization between two loach species (<Emphasis Type="Italic">Paramisgurnus dabryanus</Emphasis> and <Emphasis Type="Italic">Misgurnus anguillicaudatus</Emphasis>) in wild populations |
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Authors: | Cuihong You Xiaomu Yu Jingou Tong |
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Institution: | (1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, Wuhan, 430072, People’s Republic of China;(2) The Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China; |
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Abstract: | Artificial interspecific hybrids between large scale loach P. dabryanus and tetraploid pond loach M. anguillicaudatus (Cobitidae, Cypriniformes) are viable. To detect the occurrence of possible natural hybridization, genetic analyses by using
microsatellite markers were performed for natural populations of large scale loach and pond loach, the reciprocal laboratory
hybrids, and “supposed hybrids” with ambiguous morphology. The fertility of the artificial hybrids was also tested. At one
diagnostic microsatellite (Mac50), one out of 20 “supposed hybrids” was identified to be F1 hybrid between the two loach species because it had the same genotype as that of the laboratory hybrids. The triploid hybrids
between the two species were confirmed to be female-sterile. The results show that rare hybridization has occurred between
diploid large scale loach and tetraploid pond loach in nature although it may have little effect in genetic introgression.
This study is helpful for fish conservation and encourages further investigation on natural hybridization and introgression
of loaches. |
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