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进化系统生物学确定了在防范地面和地下攻击者的水防御中的遗传权衡

Taryn S Dunivant^1,2, Damaris Godinez-Vidal¹, Craig Perkins^1,2

¹Department of Nematology, University of California Riverside, 900 University Ave, Riverside, CA 92521, USA.

Plant & cell physiology

|September 18, 2024

概括

米植物基因KSL8和MG1显示了潜在的遗传权衡,影响了对不同害虫和病原体的耐药性. 这些遗传变异可能通过复杂的生态相互作用来维持.

科学领域:

植物遗传学植物遗传学
生态生态学生态生态学
进化生物学是进化的生物学.

背景情况:

像大米 (Oryza sativa) 这样的植物面临着来自病原体和食草动物的各种环境压力.
这些压力在地理和时间上有所不同,可能会对植物防御机制产生相互冲突的选择压力.

研究的目的:

为了调查大米防御机制中潜在的遗传权衡.
为了确定特定的基因和局部,涉及到植物-食草动物和植物-病原体相互作用.

主要方法:

进行了对地表 (落军虫,Spodoptera frugiperda) 和地下 (南方根结线虫,Meloidogyne incognita) 草食动物的测试.
对这些草食动物的米饭反应与已知的对微生物病原体的反应进行了比较.
在染色体11上的KSL8和MG1位点分析了基因多态性.

主要成果:

在KSL8和MG1位点发现了遗传权衡.
在日本大米中淘汰KSL8-jap和CPS4增加了对S.frugiperda的抵抗力,但降低了对M.incognita的抵抗力.
MG1与M. incognita耐药性有关,而其他类型对Magnaporthe oryzae和其他威胁具有耐药性.

结论:

由于复杂的社区相互作用,可以通过平衡选择来维持KSL8和MG1的多态性.
这些发现表明,植物防御进化是由多种可能相互冲突的生态压力所塑造的.

关键词:

这是一种Oryza sativa.选择平衡的平衡选择.迪特尔佩诺类动物 (Diterpenoids) 是一种形类动物.草食动物草食动物病原体是一种病原体.多态化多态化.

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