Evolutionary drivers of reproductive fitness in two endangered forest trees

IF 8.3 1区生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-08-26 DOI:10.1111/nph.20073

Eduardo Mendoza-Maya, Gustavo Ibrahim Giles-Pérez, J. Jesús Vargas-Hernández, Cuauhtémoc Sáenz-Romero, Miguel Martínez-Trujillo, María de los Angeles Beltrán-Nambo, José Ciro Hernández-Díaz, José Ángel Prieto-Ruíz, Juan P. Jaramillo-Correa, Christian Wehenkel

引用次数: 0

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两种濒危林木生殖适应性的进化驱动因素。

种群遗传学理论预测了适合度、遗传多样性（H0）和有效种群规模（Ne）之间的关系，这通常通过杂合度-适合度相关性（HFCs）进行检验。我们结合基因组、人口和繁殖数据（种子发育和发芽性状），测试了两种濒危墨西哥云杉（Picea martinezii 和 Picea mexicana）的种群和个体生育力与杂合度是否相关。这两个物种的种群数量与种子发育性状呈正相关，但与发芽率无关。个体全基因组杂合度与种子性状之间的相关性仅存在于马氏囊藻中（一般效应 HFC），与个体生育力相关的候选单核苷酸多态性（SNPs）在任何物种中均未显示出杂合优势（无局部效应 HFC）。我们观察到 P. martinezii 在最近（约 3 万年前）出现了一次种群衰退；P. mexicana 的衰退分为两个阶段，中间相隔一段较长的稳定期（约 800 ka）。在P. mexicana的种群普查中，新生树对种群总数的贡献总是大于成树，而这只发生在P. martinezii的最大种群中。保护生物学传统上提出的将适应性等同于H0或Ne的做法可能并不总是适当的，因为物种特有的进化因素可能会使这些参数之间的预期相关性脱钩。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.