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Yinghui Dong,Hanhan Yao,Xiaolong Zhou,Zhihua Lin 한국유전학회 2018 Genes & Genomics Vol.40 No.4
To determine the potential for productive efficiency and genetic improvement in the blood clam Tegillarca granosa, four offspring populations (ZZ, ZK, KZ and KK) were produced from a diallel mating of two different geographical stocks (Z and K). The levels of genetic diversity and population structures of four populations were analyzed using 14 polymorphic microsatellites. The results showed that the mean observed heterozygosities (Ho) of reciprocal cross populations (ZK and KZ) was higher than those of pure populations(ZZ and KK). The largest values of genetic differentiation coefficient ( Fst = 0.067) and Nei’s unbiased genetic distance (Dc = 0.263) were between ZK and KZ, and the smallest ( Fst = 0.020, Dc = 0.116) were between ZZ and KK, which revealed that the largest genetic divergence was between the two reciprocal cross populations and the smallest was between two pure populations. This study demonstrated that the reciprocal cross populations of T. granosa had an extensive genetic difference and improvement, which may be advantageous for future breeding studies.