Genetic Analysis Based on Mitochondrial nad2 Gene Reveals a Recent Population Expansion of the Invasive Mussel, Mytella strigata, in China
文献类型： 外文期刊
作者： Yan, Shaojing 1 ; Ma, Peizhen 1 ; Zuo, Chenxia 1 ; Zhu, Yi 1 ; Ma, Xiaojie 1 ; Zhang, Zhen 1 ;
作者机构： 1.Chinese Acad Sci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny, Qingdao Key Lab Marine Biodivers & Conservat, Qingdao 266071, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China
3.Qingdao Univ, Coll Life Sci, Qingdao 266000, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词： alien species; Mytella strigata; biological invasion; nad2; population genetics
期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）
ISSN：
年卷期： 2023 年 14 卷 11 期
页码：
收录情况： SCI
摘要： Mytella strigata is a highly adaptable invasive alien species that has been established in coastal China since 2014. Mitochondrial DNA (mtDNA) is an important tool for studying the evolution and population genetics of invasive species. In this study, the mitochondrial genome of M. strigata from China was sequenced by Illumina high-throughput sequencing and characterized with 13 protein-coding genes (PCGs). By assessing the selective pressure of 13 PCGs, the nad2 gene had the fastest evolutionary rate and was finally selected for population genetic analysis. A total of 285 nad2 sequences from seven M. strigata populations in China were analyzed and showed obviously T-rich and C-rich characteristics. According to population genetic diversity analysis, all the seven populations had haplotype (gene) diversity (Hd) >= 0.5 and nucleotide diversity (Pi) < 0.005. Haplotype networks showed a "star" distribution. Population historical dynamic analyses showed that Fu's Fs and Tajima's D values of all populations were negative except the Qukou (QK) and Beihai (BH) populations. The Zhangzhou (ZJ) and Xiamen (XM) populations were unimodal while the other populations were multimodal. These results suggested that the population of M. strigata in China may have passed the bottleneck period and is currently in a state of population expansion.
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