太平洋西部加拿大的Phytophthora infestans菌株的遗传结构和种群多样性
Segun Babarinde1,2, Rishi R Burlakoti3, Rick D Peters4
1Agassiz Research and Development Centre, Agriculture and Agri-Food Canada, 6947 Hwy 7, Agassiz, BC, V0M 1A0, Canada.
Applied microbiology and biotechnology
|February 26, 2024
概括
加拿大的晚期病因多种多样的Phytophthora infestans基因型而增加,特别是在西部. 持续监测对于控制这种土豆和西红病原体至关重要.
科学领域:
- 植物病理学 植物病理学
- 人口遗传学 人口遗传学
- 农业科学 农业科学
背景情况:
- 晚期腐烂病是由*Phytophthora infestans*引起的,是对土豆和西红生产的重大全球威胁.
- 最近加拿大疾病发病率和严重程度的增加与病原体遗传构成的变化相关.
研究的目的:
- 监测2019-2022年加拿大番茄和土豆作物的晚期虫发病率.
- 为了确定P. infestans的基因型,并评估不同地区的人口遗传多样性.
- 调查加拿大 *P. infestans* 种群中金属-m 耐药性的流行情况.
主要方法:
- 在加拿大 (2019-2022) 实地监测番茄和土豆的晚期病.
- 使用多部位方法对*P. infestans*分离物的基因定型.
- 对人口遗传多样性和结构的分析.
主要成果:
- 与加拿大东部相比,太平洋西部的加拿大表现出较高的晚期虫发病率和更大的P. infestans*遗传多样性.
- 确定了四种主要的基因型 (US11,US17,US8,US23) 和25种新的基因型;US11在西部占主导地位 (59%).
- 首次在加拿大检测到US17基因型,95%的分离物对金属-m有耐药性.
结论:
- 加拿大西太平洋地区拥有高度多样化的P. infestans种群,可能有助于性重组并带来管理挑战.
- 新型基因型的出现和广泛的金属抗性需要对加拿大的P. infestans进行持续监测.
- 加强对 *Phytophthora infestans* 种群的监测对于加拿大有效的晚病管理策略至关重要.
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