亚洲经济重要核桃的遗传起源和气候侵蚀
Peng-Zhen Fan1,2,3, Guang-Fu Zhu1,2, Moses C Wambulwa1,2,4
1CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.
概括
气候变化威胁到亚洲的核桃遗传多样性. 保护喜马拉雅山脉的努力对于保护这些重要物种及其应对未来风险的潜力至关重要.
科学领域:
- 生态学与进化生物学
- 保护遗传学
- 气候变化生物学
背景情况:
- 全球气候变化对物种的持续存在构成重大威胁,但对遗传多样性的时空影响尚不清楚,阻碍了有效的保护.
- 核桃 (Juglans regia和J. sigillata) 在亚洲具有重要的经济价值,
研究的目的:
- 评估亚洲核桃的遗传多样性模式和人口历史.
- 调查未来因气候变化而造成的遗传侵蚀的潜在风险.
- 根据核桃种类的保护和繁殖策略.
主要方法:
- 通过31个微卫星对来自亚洲233个核桃种群的5282个个体进行基因定型.
- 对遗传多样性,人口结构和人口历史的分析.
- 在气候变化场景下对未来遗传多样性变化的建模.
主要成果:
- 在喜马拉雅山脉和恒达山脉观察到高遗传多样性.
- 在纪期间,Juglans regia和J. sigillata分离;J. regia包括两个群体 (JR1,JR2),其中JR2的多样性较低,并可能通过人类介导引入中国北部.
- 这两种物种之间发生了杂交,在喜马拉雅中部和四川盆地形成了不同的杂交区.
结论:
- 预计未来的气候变化将使核桃的遗传多样性减少9.03%,主要山区的遗传结构将出现显著的变化.
- 保护喜马拉雅山脉的遗传多样性和适应能力至关重要.
- 建议对独特的野生生殖质进行现场保护,并将其纳入育种计划,以提高亚洲核桃的气候适应性.
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