title: Genetic diversity among red swamp crayfish (Procambarus clarkii) populations in the middle and lower reaches of the Yangtze River based on AFLP markers.
abstract: The red swamp crayfish has become one of the most important freshwater aquaculture species in China. At present, although it is widely distributed in the middle and lower reaches of the Yangze River basin, little is known about its population genetics and geographic distribution in China. We estimated the genetic diversity among 6 crayfish populations from 4 lakes (Hongze Lake, Poyang Lake, Dongting Lake, and Yue Lake) using AFLPs. A total of 129 loci were generated with 5 EcoRI-MseI primer combinations and scored as binary data in 139 individuals. These data were analyzed by cluster methods with the NTSYSpc software package. The 6 populations were separated into 3 major clusters by principal coordinate analysis and cluster analysis. Among the 6 populations, the highest gene diversity was found within the Nanjing population. Analysis of molecular variance demonstrated that most variation occurred within populations (91.20%). The estimated average GST value across all loci was 0.4186, suggesting (very) low gene flow among the different localities. We conclude that there is high genetic differentiation among crayfish in the middle and lower reaches of the Yangze River. This information will help in the selection of high-quality individuals for artificial reproduction.
authors.affiliation: Henry Fok School of Life Science, Shaoguan University, Shaoguan, Guangdong Province, China.
authors.forename: B F
authors.initials: BF
authors.lastname: Zhu
authors.forename: Y
authors.initials: Y
authors.lastname: Huang
authors.forename: Y G
authors.initials: YG
authors.lastname: Dai
authors.forename: C W
authors.initials: CW
authors.lastname: Bi
authors.forename: C Y
authors.initials: CY
authors.lastname: Hu
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis / Q000379:methods*; D000818:Animals; D003400:Astacoidea / Q000145:classification / Q000235:genetics*; D002681:China; D016000:Cluster Analysis; D004247:DNA / Q000032:analysis / Q000235:genetics*; D051456:Gene Flow; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D060106:Lakes; D008957:Models, Genetic; D016133:Polymerase Chain Reaction; D045483:Rivers; D053833:Wetlands
chemical_list: D004247:DNA