The loss of genetic diversity in Sichuan taimen as revealed by DNA fingerprinting.
Species endangerment often derives from the "endangerment" of genetic diversity, thus loss of genetic diversity is an important cause of species extinction. Since historical specimens were unavailable, previous studies mainly described the genetic diversity status in the current population rather than the loss of genetic variation over time. In this study, we collected samples during 1998-1999 and obtained historical specimens from 1957 to 1958. Based on the two sets of fish, we determined the changes in genetic diversity of Sichuan taimen using DNA fingerprinting. The differences in genetic parameters between the present samples and historical taimens revealed their loss of genetic variation. As a result, the existing populations have lower viability, and proper management has to be implemented to preserve genetic diversity.
Wu
Xue-Chang
XC
College of Life Sciences and the Key Laboratory of Conservation Genetics and Reproductive Biology for Endangered Wild Animals of the Ministry of Education, Zhejiang University, Hangzhou, 310029, PR China. xuechangwu@yahoo.com.cn
D000483:Alleles; D000818:Animals; D001483:Base Sequence; D002681:China; D004247:DNA / Q000235:genetics; D016172:DNA Fingerprinting; D005787:Gene Frequency; D014644:Genetic Variation; D012487:Salmonidae / Q000235:genetics*; D013997:Time Factors
D004247:DNA