紫花苜蓿气候适应性和气候变化复原力的进化基因组学。

IF 17.1 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecular Plant Pub Date : 2024-06-03 Epub Date: 2024-04-26 DOI:10.1016/j.molp.2024.04.013
Fan Zhang, Ruicai Long, Zhiyao Ma, Hua Xiao, Xiaodong Xu, Zhongjie Liu, Chunxue Wei, Yiwen Wang, Yanling Peng, Xuanwen Yang, Xiaoya Shi, Shuo Cao, Mingna Li, Ming Xu, Fei He, Xueqian Jiang, Tiejun Zhang, Zhen Wang, Xianran Li, Long-Xi Yu, Junmei Kang, Zhiwu Zhang, Yongfeng Zhou, Qingchuan Yang
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引用次数: 0

摘要

鉴于气候变化对农业和粮食安全的影响日益加剧,深入了解气候适应性的进化动态和发现气候适应性变异有助于培育气候适应性作物,以应对未来的气候变化。紫花苜蓿(Medicago sativa subsp.我们利用来自24个Medicago物种的702个基因组重测序数据,进行了种群基因组分析,以揭示紫花苜蓿对未来气候变化的气候适应性和遗传易感性。我们发现,种间基因交换促进了紫花苜蓿基因库的发展,尤其是丰富了防御和应激反应基因。紫花苜蓿亚种(Medicago sativa subsp.falcata)和紫花苜蓿之间的亚种间引种不仅有助于紫花苜蓿的气候适应,还带来了遗传负担。共有1671个基因与气候适应有关,其中5.7%是从falcata亚种引入的。通过整合气候相关变异和气候数据,我们发现了未来气候变化中的脆弱种群,尤其是在北半球的高纬度地区,这为有针对性的保护措施和育种工作吹响了号角。此外,我们还揭示了对气候波动具有更强适应力的前适应种群,为未来的育种策略指明了道路。这项研究加深了我们对紫花苜蓿本地适应性的理解,有助于培育气候适应性强的栽培品种,为面对未来气候变化的有效农业战略做出贡献。
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Evolutionary genomics of climatic adaptation and resilience to climate change in alfalfa.

Given the escalating impact of climate change on agriculture and food security, gaining insights into the evolutionary dynamics of climatic adaptation and uncovering climate-adapted variation can empower the breeding of climate-resilient crops to face future climate change. Alfalfa (Medicago sativa subsp. sativa), the queen of forages, shows remarkable adaptability across diverse global environments, making it an excellent model for investigating species responses to climate change. In this study, we performed population genomic analyses using genome resequencing data from 702 accessions of 24 Medicago species to unravel alfalfa's climatic adaptation and genetic susceptibility to future climate change. We found that interspecific genetic exchange has contributed to the gene pool of alfalfa, particularly enriching defense and stress-response genes. Intersubspecific introgression between M. sativa subsp. falcata (subsp. falcata) and alfalfa not only aids alfalfa's climatic adaptation but also introduces genetic burden. A total of 1671 genes were associated with climatic adaptation, and 5.7% of them were introgressions from subsp. falcata. By integrating climate-associated variants and climate data, we identified populations that are vulnerable to future climate change, particularly in higher latitudes of the Northern Hemisphere. These findings serve as a clarion call for targeted conservation initiatives and breeding efforts. We also identified pre-adaptive populations that demonstrate heightened resilience to climate fluctuations, illuminating a pathway for future breeding strategies. Collectively, this study enhances our understanding about the local adaptation mechanisms of alfalfa and facilitates the breeding of climate-resilient alfalfa cultivars, contributing to effective agricultural strategies for facing future climate change.

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来源期刊
Molecular Plant
Molecular Plant 植物科学-生化与分子生物学
CiteScore
37.60
自引率
2.20%
发文量
1784
审稿时长
1 months
期刊介绍: Molecular Plant is dedicated to serving the plant science community by publishing novel and exciting findings with high significance in plant biology. The journal focuses broadly on cellular biology, physiology, biochemistry, molecular biology, genetics, development, plant-microbe interaction, genomics, bioinformatics, and molecular evolution. Molecular Plant publishes original research articles, reviews, Correspondence, and Spotlights on the most important developments in plant biology.
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