Natural Hybridization between Diploid Crucian Carp Species and Genetic Independence of Triploid Crucian Carp Elucidated by DNA Markers(Genetics)
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概要
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The population structure of genus Carassius in Lake Koyama, southeast Japan, was analyzed by genetic markers as microsatellite DNA, mtDNA RFLP and isozymes. Based on the ploidy level and morphological analysis, four Carassius groups were detected. The triploid group was identified as Ginbuna (C. langsdorfii). In the diploid group, Nagabuna (C. burugeri sp) and Gengoroubuna, (C. cuvieri) were identified. Remaining diploid individuals had morphological traits that were intermediate between Nagabuna and Gengoroubuna. These were considered as hybrids and their descendants. From the results of mtDNA RFLP and isozyme patterns, the triploid population was considered to be independent from the gene pools of diploid. The hybrids had the mtDNA haplotypes which were common to Gengoroubuna and Nagabuna populations. Based on the three microsatellite loci, Ginbuna was classified into six clonal lines. In the diploid population, substitution of the major alleles of Nagabuna and Gengoroubuna were found. The hybrids had alleles that were common in Nagabuna and Gengoroubuna. The values of the hybrid index (I_H) which are ranged from 0.771 to 0.964 in Nagabuna, from 0.102 to 0.806 in the hybrids and from 0.068 to 0.157 in Gengoroubuna. The hybrid population was verified to be derived from crossbreeding between the Gengoroubuna and Nagabuna populations. Evidence of backcrossing in nature by microsatellite DNA markers was also obtained in the diploid populations.
- 社団法人日本動物学会の論文
- 2000-04-10
著者
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Ohara K
Tohoku Univ. Sendai Jpn
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Ohara K
Laboratory Of Applied Population Genetics Graduate School Of Agricultural Science Tohoku University:
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Ohara Kenichi
Laboratory Of Applied Population Genetics Graduate School Of Agricultural Science Tohoku University
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Taniguchi Nobuhiko
Laboratory of Applied Population Genetics, Graduate School of Agricultural Science, Tohoku Universit
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Sumida Eiji
Department Of Aquaculture Faculty Of Agriculture Kochi University
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Taniguchi N
Laboratory Of Population Genetics Informatics Graduate School Of Agricultural Science Tohoku Univers
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Ariyoshi Takahiro
Department of Aquaculture, Faculty of Agriculture, Kochi University
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Sitizyo Kiichirou
Department of Veterinary, Faculty of Agriculture, Tottori University
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Ariyoshi Takahiro
Department Of Aquaculture Faculty Of Agriculture Kochi University
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Taniguchi Nobuhiko
Laboratory Of Applied Population Genetic Informatics Graduate School Of Agricultural Science Tohoku
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Sitizyo Kiichirou
Department Of Veterinary Faculty Of Agriculture Tottori University
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Taniguchi Nobuhiko
Laboratory Of Population Genetic Informatics Graduate School Of Agricultural Science Tohoku University
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