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Genomic inbreeding and population structure of northern pike (Esox lucius) in Xinjiang, China

文献类型： 外文期刊

作者： Luan, Peixian 1 ; Huo, Tangbin 1 ; Ma, Bo 1 ; Song, Dan 1 ; Zhang, Xiaofeng 1 ; Hu, Guo 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, 232 Hesong St, Harbin 150070, Heilongjiang, Peoples R China

2.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab Freshwater Aquat Biotechnol & Breeding, Harbin, Peoples R China

关键词： coancestry coefficient; effective population size; Esox Lucius; gene flow; identity by descent; Inbreeding

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.392； 五年影响因子：2.749 ）

ISSN： 2045-7758

年卷期： 2021 年 11 卷 10 期

页码：

收录情况： SCI

摘要： Northern pike (Esox lucius) was widely distributed in the high latitudes of the northern hemisphere. In China, northern pike was originally distributed only in the upper reaches of the Irtysh River in Xinjiang and has appeared in many water bodies outside the Irtysh River Basin in Northern Xinjiang. A total of four populations were collected from north to south in Xinjiang, including Irtysh River (RIR), Ulungu Lake (LUL), a small lake nearby Ulungu River (LJD), and Bosten Lake (LBO). We estimated population genomic parameters, performed gene flow analysis, and estimated the effective population size of each population. The proportion of individuals with high inbreeding coefficient (F >= 0.0625) accounted for 36.4% (44/121) of all sequenced individuals, approximately 4.5% (1/22) in LUL, 25.9% (7/27) in LBO, 42.9% (18/42) in RIR, and 60% (18/30) in LJD. RIR had the highest mean of genomic relatedness (coancestry coefficient = 0.025 +/- 0.040, IBD = 0.036 +/- 0.078). Gene flow results showed that the population spreading was from RIR into two branches, one was LBO, and the other continued to split into LUL and LJD, and migration signal from LBO to LUL was detected. Our results suggested that the extinction risk of northern pike was very low in Xinjiang of China, and the controlled capture fishery of northern pike could be developed reasonably.

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