Diverse mitogenomic variations contribute to population differentiation in Eurasian tree sparrows(Passer montanus)OA
Mitochondrial genomes(mitogenomes)play a crucial role in species adaptation to diverse evolutionary pressures.Although adaptive changes in mitochondrial genes have been reported under extreme conditions,large-scale analyses of mitogenomic evolution across ecologically diverse habitats are still limited.The Eurasian tree sparrow(Passer montanus),one of the most widely distributed avian species,occupies variable habitats,providing an ideal model for investigating mitochondrial responses to environmental heterogeneity.This study examined mitogenomic variation in tree sparrow populations sampled across China,revealing pronounced mitochondrial divergence in geographically isolated populations,particularly those in southern Xizang on the QinghaiXizang Plateau and the continental islands of Hainan and Taiwan.In the high-altitude population of southern Xizang,non-synonymous substitutions in COX2 and COX3 may enhance protein stability,potentially facilitating adaptation to cold and hypoxic conditions.In contrast,substitutions in ATP6(Hainan)and ND5(Taiwan)may reduce protein stability,implying distinct mitogenomic responses to local environmental constraints.Moreover,distinct t RNA mutations in the Hainan populations may confer increased structural flexibility,potentially contributing to islandspecific adaptation.These findings highlight the role of mitochondrial genomes in responding to ecological variation and geographic barriers,underscoring the prospective functional consequences of mitogenomic evolution.
Cheng-Bin Shan;Ning Wang;Wei Liang;Xiang-Jiang Zhan;Long-Wu Wang;Le Yang;Qiong Liu;Yan-Lin Liu;Hao Meng;Hai-Tao Wang;Wei Xie;Sangeet Lamichhaney;Bin Liang
State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock,School of Life Sciences,Inner Mongolia University,Hohhot,Inner Mongolia Autonomous Region 010070,ChinaState Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock,School of Life Sciences,Inner Mongolia University,Hohhot,Inner Mongolia Autonomous Region 010070,China Inner Mongolia Engineering Technology Research Center of Germplasm Resources Conservation and Utilization,Hohhot,Inner Mongolia Autonomous Region 010070,ChinaMinistry of Education Key Laboratory for Ecology of Tropical Islands,Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province,College of Life Sciences,Hainan Normal University,Haikou,Hainan 571158,ChinaState Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,China Key Laboratory of Animal Ecology and Conservation Biology,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,ChinaMinistry of Education Key Laboratory for Ecology of Tropical Islands,Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province,College of Life Sciences,Hainan Normal University,Haikou,Hainan 571158,ChinaKey Laboratory of Biological Resources and Biosafety,Institute of Plateau Biology Research of Xizang Autonomous Region,Lhasa,Xizang Autonomous Region 850000,ChinaState Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,China Life Science&Medicine,Northwest University,Xi’an,Shaanxi 710069,ChinaCollege of Life Sciences,Qinghai Normal University,Xining,Qinghai 810016,ChinaState Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock,School of Life Sciences,Inner Mongolia University,Hohhot,Inner Mongolia Autonomous Region 010070,ChinaSchool of Life Sciences,Northeast Normal University,Changchun,Jilin 130024,ChinaSchool of Life Sciences,Tsinghua University,Beijing 100084,ChinaDepartment of Biological Sciences,Kent State University,Kent,Ohio 44240,USAState Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock,School of Life Sciences,Inner Mongolia University,Hohhot,Inner Mongolia Autonomous Region 010070,China Inner Mongolia Engineering Technology Research Center of Germplasm Resources Conservation and Utilization,Hohhot,Inner Mongolia Autonomous Region 010070,China
生物科学
Whole mitochondrial genomesEurasian tree sparrowsGeographical isolationGenetic driftLocal adaptation
《Zoological Research》 2026 (1)
P.101-116,16
supported by the National Natural Science Foundation of China(32160114 and 32460125 to B.L.,32170460 and32570495 to N.W.,32125005 to X.J.Z.)State Key Laboratory of Reproductive Regulation&Breeding of Grassland Livestock(2025KYPT0081)Young Science and Technology Talents Program for Universities in Inner Mongolia(NJYT23087)to B.L.Outstanding Young Scientist Project of Natural Science Foundation of Inner Mongolia Autonomous Region of China(2022JQ07)Cultivation Project of Inner Mongolia University(21221505)to N.W.Talent Research Startup Foundation of Hainan Normal University(HSZK-KYQD-202606)to L.W.W。
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