Conservation genomics provides insights into genetic resilience and adaptation of the endangered Chinese hazelnut, Corylus chinensis

作     者：Zhen Yang Lisong Liang Weibo Xiang Lujun Wang Qinghua Ma Zhaoshan Wang Zhen Yang;Lisong Liang;Weibo Xiang;Lujun Wang;Qinghua Ma;Zhaoshan Wang

作者机构：Key Laboratory of Tree Breeding and CultivationNational Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China National Engineering Research Center of Eco-Environment Protection for Yangtze River Economic BeltChina Three Gorges CorporationBeijing 100083China Rare Plants Research Institute of Yangtze RiverChina Three Gorges CorporationYichang 443133China Research Institute of Economic Forest Cultivation and ProcessingAnhui Academy of ForestryHefei 230031China 

出 版 物：《Plant Diversity》 (植物多样性（英文版）)

年 卷 期：2024年第46卷第3期

页      面：294-308页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.32101541) the National Key R&D Program of China(Grant No.2022YFD2200400) 

主　　题：Conservation genomics Demographic history Inbreeding Genetic load Runs of homozygosity Local adaptation 

摘      要：Global climate change has increased concerns regarding biodiversity ***,many key conservation issues still required further research,including demographic history,deleterious mutation load,adaptive evolution,and putative *** we generated the first chromosome-level genome of the endangered Chinese hazelnut,Corylus chinensis,and compared the genomic signatures with its sympatric widespread ***-C yunnanensis *** found large genome rearrangements across all Corylus species and identified species-specific expanded gene families that may be involved in *** genomics revealed that both *** and the *** complex had diverged into two genetic lineages,forming a consistent pattern of southwestern-northern *** size of the narrow southwestern lineages of both species have decreased continuously since the late Miocene,whereas the widespread northern lineages have remained stable(***) or have even recovered from population bottlenecks(*** complex) during the *** with ***-C. yunnanensis complex,*** showed significantly lower genomic diversity and higher inbreeding ***,*** carried significantly fewer deleterious mutations than ***-C. yunnanensis complex,as more effective purging selection reduced the accumulation of homozygous *** also detected signals of positive selection and adaptive introgression in different lineages,which facilitated the accumulation of favorable variants and formation of local ***,both types of selection and exogenous introgression could have mitigated inbreeding and facilitated survival and persistence of ***,our study provides critical insights into lineage differentiation,local adaptation,and the potential for future recovery of endangered trees.