文献类型：期刊文献

英文题名：Population genomics reveals demographic history and selection signatures of hazelnut (Corylus)

作者：Yang, Zhen[1] Ma, Wenxu[1,2] Wang, Lujun[3] Yang, Xiaohong[4] Zhao, Tiantian[1] Liang, Lisong[1] Wang, Guixi[1] Ma, Qinghua[1]

第一作者：杨振

通信作者：Ma, QH[1]

机构：[1]Chinese Acad Forestry, Natl Forestry & Grassland Adm, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[2]Univ Goettingen, Forest Bot & Tree Physiol, D-37077 Gottingen, Germany;[3]Anhui Acad Forestry, Res Inst Econ Forest Cultivat & Proc, Hefei 230031, Peoples R China;[4]Guizhou Acad Forestry, Res Inst Walnut, Guiyang 550005, Peoples R China

年份：2023

卷号：10

期号：5

外文期刊名：HORTICULTURE RESEARCH

收录：;Scopus(收录号：2-s2.0-85161600184);WOS:【SCI-EXPANDED(收录号:WOS:000995002100003)】；

基金：This work was supported by the National Natural Science Foundation of China (32101541) and the Key Research and Development Program of Hebei Province (21326804D).

语种：英文

摘要：Hazelnut (Corylus spp.) is known as one of the four famous tree nuts in the world due to its pleasant taste and nutritional benefits. However, hazelnut promotion worldwide is increasingly challenged by global climate change, limiting its production to a few regions. Focusing on the eurytopic Section Phyllochlamys, we conducted whole-genome resequencing of 125 diverse accessions from five geo-ecological zones in Eurasia to elucidate the genomic basis of adaptation and improvement. Population structure inference outlined five distinct genetic lineages corresponding to climate conditions and breeding background, and highlighted the differentiation between European and Asian lineages. Demographic dynamics and ecological niche modeling revealed that Pleistocene climatic oscillations dominantly shaped the extant genetic patterns, and multiple environmental factors have contributed to the lineage divergence. Whole-genome scans identified 279, 111, and 164 selective sweeps that underlie local adaptation in Corylus heterophylla, Corylus kweichowensis, and Corylus yunnanensis, respectively. Relevant positively selected genes were mainly involved in regulating signaling pathways, growth and development, and stress resistance. The improvement signatures of hybrid hazelnut were concentrated in 312 and 316 selected genes, when compared to C. heterophylla and Corylus avellana, respectively, including those that regulate protein polymerization, photosynthesis, and response to water deprivation. Among these loci, 22 candidate genes were highly associated with the regulation of biological quality. Our study provides insights into evolutionary processes and the molecular basis of how sibling species adapt to contrasting environments, and offers valuable resources for future climate-resilient breeding.