Abstract：In order to explore the growth advantages of different cross combinations of the Chinese soft-shelled turtle Pelodiscus sinensis and to reveal the evolutionary characteristics of the genetic structure of multi-generational cross populations, growth performance, genetic diversity, and population structure were investigated in typical regional variants including the Huangsha population, Japanese population, Dongting population, and their cross offsprings: Huangriza F1 (Huangsha population ♂ × Japanese population ♀), backcross F1 (Huangsha population♂ × Huangriza F1 ♀), and hydrid soft-shelled turtle population (backcross F1 ♂ × Dongting population ♀). The results showed that significant differences in key growth indicators including initial body weight, final body weight, weight gain rate, and specific growth rate (P<0.05) were observed among various groups, with growth advantages, particularly superior growth performance and higher morphological stability in the backcross F1 generation. There was greater genetic diversity in the cross groups than that in their parental lines, with the maximal genetic diversity in hybrid soft-shelled turtle population (allele fraction=7.250, effection number of alleles=2.763, diversity index=1.158), indicating that the cross of the backcross F1 with Dongting population led to facilitate the introduction of new genetic variations, and enhancing gene flow and adaptability. The genetic differences were shown to be primarily found within populations (78.8%). Genetic structure analysis revealed that there were significant differences among the six populations, with Huangsha population and Japanese population being distinctly separated genetically, while the Dongting population exhibited higher genetic diversity. In contrast, the more complex genetic traits of Huangriza F1, backcross F1, and hybrid soft-shelled turtle population indicated that genetic recombination in cross descendants significantly enhanced genetic diversity.
黄长青, 梁艺馨, 田鹏, 高星, 胡亚洲, 王晓清. 中华鳖杂交种形态、生长与亲缘关系比较研究[J]. 水产科学, 2026, 45(4): 549-561.
HUANG Changqing, LIANG Yixin, TIAN Peng, GAO Xing, HU Yazhou, WANG Xiaoqing. Comparison of Morphology, Growth, and Phylogenetic Relationships in Cross among Different Populations of Chinese Soft-Shelled Turtle. Fisheries Science, 2026, 45(4): 549-561.
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2026, Vol. 45 
