Conspecific relation between two seasonal migratory forms of endangered Caspian trout, Salmo trutta caspius Kessler, ۱۸۷۷, revealed by RAPD markers

  Random amplified polymorphic DNA (RAPD) markers were used to estimate genetic relationships between two seasonal immigrant forms (namely fall-run and spring-run) of Caspian trout Salmo trutta caspius. In this regard, ۶۲ fin tissue samples were collected from southern parts of the Caspian Sea basin and examined with ۱۶ oligodecamer primers to asses their genetic diversity as well as probable specific population bands. The total number of RAPD bands produced in spring and fall-run were ۱۶۲ bands, of which ۶۹ and ۵۳ bands were polymorphic for each population. Nei's genetic identity and genetic distance between spring-run and fall-run populations were ۰.۹۸۵۸ and ۰.۰۱۴۳۰, respectively. The RAPD based data revealed that the two migratory forms of Caspian salmon were categorized in conspecific value.

Keywords:

Genetic diversity , RAPD , Caspian trout , Fall and spring run.