Molecular Markers Reveal Reduced Genetic Diversity in Romanian Populations of Brown Trout, Sahno trutta L., 1758 (Salmonidae)

作者：Popa Gina Oana; Curtean Banaduc Angela; Banaduc Doru; Florescu Iulia Elena; Burcea Alexandra; Dudu Andreea; Georgescu Sergiu Emil^*; Costache Marieta

来源：Acta Zoologica Bulgarica, 2016, 68(3): 399-406.

• salmonids
• Carpathians
• nuclear markers
• genetic diversity

Various technologies along Romanian mountain rivers are destructive and affect aquatic habitats and communities. The salmonids are one of the affected fish families and a decrease in their populations is being reported throughout Europe. In order to mitigate the reduction of numbers and even loss of populations as a result of human impact, frequent restocking activities are being applied. Often these activities are not preceded by any genetic analysis aiding the selection of the needed biological material. Our study aimed to evaluate the genetic diversity of four brown trout populations from stream habitats, which are heavily modified owing to micro-hydropower plants, small dams on the riverbed and permanent water extractions. Based on nine microsatellite loci, the mean values of the Inbreeding Coefficient Index (Fis) showed heterozygote deficit for two populations. The mean number of migrants suggested the existance of a gene flow between three pairs of the analysed brown trout populations, while the factorial correspondence analysis grouped the individuals in three clusters. In conclusion, the genetic diversity of the four brown trout populations, assessed by using nuclear markers, was high for only two of them, with a degree of overlapping between the other two.

• 出版日期2016-9