在巴西,对大豆 (Lepidoptera: Tortricidae) 的分子特征和人口统计见解
Davi de Souza Fernandes1, Renato Jun Horikoshi1,2, Patrick M Dourado2
1Department of Entomology and Acarology, "Luiz de Queiroz" College of Agriculture, University of São Paulo (ESALQ/USP), Piracicaba, São Paulo, Brazil.
Journal of insect science (Online)
|March 8, 2024
概括
巴西的大豆芽不是Crocidosema aporema,而是一个不同的Crocidosema物种. 它的人口扩张与大豆种植增加有关,而不是地理因素.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 分子遗传学分子遗传学
- 农业科学 农业科学
背景情况:
- 巴西的大豆毛虫,以前被确定为Crocidosema aporema,已经显示出更多的爆发.
- 害虫识别的不确定性及其分布的有限知识阻碍了有效的管理策略.
研究的目的:
- 用分子和形态学数据来描述巴西的大豆芽钻探物种.
- 调查这个重要的大豆害虫的植物地理起源和种群结构.
主要方法:
- 从巴西的大豆田中收集了90只Lepidoptera个体.
- 测序了线粒体COI和COII基因用于DNA条形码.
- 分析了翅膀图案和男性生殖器形态,以进行分类识别.
主要成果:
- 通过DNA条形码识别了10个个体为Argyrotaenia sphaleropa,80个是Crocidosema物种,与C. aporema不同.
- 形态分析不足以确定巴西标本为C. aporema.
- 巴西和哥斯达黎加标本之间的遗传距离 (5.26.4%) 表明它们不是同一物种.
- 在巴西大豆作物中发现了一种基因低多样性的单一基因菌株,与地理或气候因素无关.
结论:
- 巴西的大豆芽代表了一个独特的Crocidosema物种,而不是C. aporema.
- 这种害虫的种群扩张与巴西大豆种植的增长有关.
- 扩大大豆农业可能促进了害虫种群规模的增加.
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