侵袭性秋季军虫对玉米的适应性进化,其中可能涉及细胞染色体P450基因
Sudeeptha Yainna1,2, Frédérique Hilliou3, Sabine Haenniger4
1DGIMI, INRAE, Univ Montpellier, Montpellier, France.
BMC genomics
|October 9, 2024
概括
塞内加尔的入侵性秋季军 (Spodoptera frugiperda) 显示了对玉米的适应性进化. 基因分析确定了关键的P450基因,这些基因有助于提高玉米的存活率.
科学领域:
- 基因组学和进化生物学
- 虫害管理 虫害管理 虫害管理
- 昆虫生态学 昆虫生态学
背景情况:
- 侵入性物种在本地范围之外建立种群,可能是通过适应性进化.
- 秋季军虫 (Spodoptera frugiperda) 是一个重要的玉米害虫,于2016年入侵西非.
- 了解适应的遗传基础对于控制入侵性害虫至关重要.
研究的目的:
- 研究秋季军虫在入侵群体中对玉米的适应性进化.
- 为了确定涉及到适应玉米消费的遗传位置和基因.
主要方法:
- 对原生 (美国) 和入侵 (塞内加尔) 秋军虫种群的基因组和转录组分析.
- 主要组件分析,以确定人口的起源.
- 选择性扫描分析以确定选择的目标.
- 转录组分析以评估基因表达.
- 幼虫食试验以评估玉米的生存率.
主要成果:
- 塞内加尔秋季军种群起源于玉米菌株.
- 在选择性扫描中确定了三个基因位置,包括四个细胞染色体P450基因 (CYP321B1,CYP321B3,CYP321B4,CYP337B5).
- 在侵袭性种群中和接触玉米时,CYP321B1和CYP321B3过度表达,观察到更高的幼虫存活率.
结论:
- 塞内加尔秋季军种群表现出与细胞染色体P450基因相关的适应性进化,提高了玉米的生存率.
- 在玉米上稳定选择可能有助于秋季军的入侵成功.
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