Abstract:
To guide breeding of
Megalobrama terminalis,
Megalobrama amblycephala and
Erythroculter ilishaeformis, two hybrids
Megalobrama amblycephala×
Erythroculter ilishaeformis,
Megalobrama terminalis×
Erythroculter ilishaeformisand their parents were analyzed using sixteen microsatellite markers. The mean value of number of alleles (
Na) were 3.56, 3.63, 3.44, 4.00 and 4.31, respectively. The mean value of observed heterozygosity (
Ho) were 0.3510, 0.3757, 0.3175, 0.3818, and 0.4079, respectively. The mean value of expected heterozygosity (
He) were 0.6182, 0.6290, 0.5921, 0.6490 and 0.6825, respectively. And the average value of polymorphism information content (
PIC) were 0.5354, 0.5367, 0.5258, 0.5785, and 0.6067, respectively. The average value of polymorphism information content (
PIC) of two hybrid population were higher than their parent
Megalobrama amblycephala,
Megalobrama terminalis and
Erythroculter ilishaeformis, indicating a high genetic diversity. The unweighted pair-group method with arithmetic means (UPGMA) showed that populations of the
Megalobrama amblycephalaand
Megalobrama terminalisfirst grouped together, and that
Megalobrama amblycephala♀×
Erythroculter ilishaeformis♂ and
Megalobrama terminalis♀×
Erythroculter ilishaeformis♂ first grouped together, and then they clustered with the
Erythroculter ilishaeformis. In addition, the farthest genetic distance (0.5204) was between
Megalobrama amblycephala and
Erythroculter ilishaeformis, and the nearest genetic distance (0.0853) was between
Megalobrama amblycephalaand
Megalobrama terminalis. According to the genetic identity analysis, two hybirds groups showed the maternal effect. The alleles of two hybirds were from their parents based on genetic analysis. Particularly, microsatellite primers TTF3, TTF4, TTF10, and Mam25 identified 5 groups. Our results provide important value in breeding, germplasm resources preservation, and germplasm identification of
Megalobrama terminalis×
Erythroculter ilishaeformis and
Megalobrama amblycephala×
Erythroculter ilishaeformis.