异质效应对于秋季军虫菌株间杂交的幼虫表现
1DGIMI, University of Montpellier, INRAE, Montpellier, France.
Insect science
|November 16, 2023
概括
秋季军虫 (FAW) 菌株的杂交揭示了异构,提高了生存和发育的表现. 相互交叉表明超出线粒体或性染色体的遗传因素驱动了FAW适应不同宿主.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 昆虫生物学和生态学
- 农业昆虫学 农业昆虫学
背景情况:
- 虫 (Fall armyworm,FAW) 是一种侵袭性害虫,威胁着粮食安全.
- 两种形态相同的菌株,SfR (大米) 和SfC (玉米),表现出不同的宿主偏好.
- 菌株之间的有限的基因组多态性阻碍了对宿主适应的理解.
研究的目的:
- 调查母亲或父亲遗传的局部在FAW菌株分歧中的作用.
- 在SfR和SfC菌株的相互F1杂交品种中测试异构和Haldane规则.
主要方法:
- 产生互惠的F1杂交 (SfR ♀ × SfC ♂和SfC ♀ × SfR ♂).
- 在人工饮食和玉米植物上培育家长菌株和杂交品种.
- 表型评估包括体重,生存率,发育时间和性别比.
主要成果:
- 杂交动物在人工饮食中表现出增强的生存,幼的出现和发育时间.
- 杂交动物在人工养时表现出中间的幼体重,在玉米养时表现出优越的幼体重.
- 不对称的结果和减少的杂交后代繁殖表明异构和潜在的哈尔丹规则.
结论:
- 除了线粒体或性染色体之外,宿主菌株相关的位置会影响FAW的表现.
- 在FAW表现中存在异构的证据,表明混合动力.
- 对了解FAW适应和物种化的潜在影响,可能与Haldane规则有关.
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