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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 33, No. 4, 2012, pp. E33-E39
Bioline Code: zr12051
Full paper language: English
Document type: Report
Document available free of charge

Zoological Research, Vol. 33, No. 4, 2012, pp. E33-E39

 en Genetic diversity and differentiation of masu salmon ( Oncorhynchus masou masou check for this species in other resources ) between and within cultured populations inferred from microsatellite DNA analysis
JIA, Zhiying; ZHANG, Yuyong; CHEN, Shuqiang & SHI, Lianyu


Masu salmon, Oncorhynchus masou masou check for this species in other resources , is one of the most valuable fishery species that has been introduced to China, though to date no studies on the genetic diversity and genetic relationship among hatchery populations has been performed with molecular markers. We undertook such a study and sampled 120 individuals from three hatchery stocks and analyzed 20 microsatellite loci. All loci were polymorphic and a total of 91 alleles were detected. A relatively low level of genetic diversity was revealed with effective number of allele of 3.1094, 3.3299 and 3.1894 and expected heterozygosity of 0.6600, 0.6648 and 0.6638 in the three stocks, respectively. Deviations from Hardy-Weinberg equilibrium were found due to heterozygote deficit. Accordingly, evidence of genetic bottlenecks were found in the three stocks. An individual assignment test demonstrated that 85% of individuals were correctly assigned into their original stocks. Pairwise Fst revealed that significant differentiation occurred between these three stocks. The results of the study indicated that disequilibrium of genetic structure and differentiation has occurred in all three stocks. This information collectively provides a basis for measures to avoid of loss of genetic diversity and introgression in Chinese aquaculture.

Oncorhynchus masou masou; Microsatellite; Genetic diversity; Genetic differentiation

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