加拿大阿尔伯塔省的土豆早死 (PED):对产量损失的因果因素和影响的洞察
A U Rahman1,2, M Munawar3, M Konschuh4
1University of Lethbridge, Biological Sciences, Lethbridge, Alberta, Canada.
Phytopathology
|January 21, 2026
概括
马早期死亡 (PED) 是一个重要的全球问题. 这项研究在大多数阿尔伯塔土豆田中发现了Verticillium dahliae,与疾病严重程度相关,尽管其他因素也会影响PED.
科学领域:
- 植物病理学 植物病理学
- 农业科学 农业科学
- 土壤微生物学 土壤微生物学
背景情况:
- 马早期死亡 (PED) 是全球马生产的一个主要限制.
- PED通常归因于土壤传播的病原体的复杂性,包括Verticillium物种和Pratylenchus penetrans.
- 具体的致病因子及其在加拿大阿尔伯塔省的流行程度仍然不完全理解.
研究的目的:
- 在阿尔伯塔省南部的土豆田中调查Verticillium dahliae和Verticillium albo-atrum的发病率和丰度.
- 评估Verticillium物种,Colletotrichum coccodes和土豆早期死亡严重程度和产量损失之间的关系.
- 描述阿尔伯塔省PED的致病因子.
主要方法:
- 量化聚合酶连锁反应 (qPCR) 用于检测和量化V. dahliae和V. albo-atrum在两年 (2020-2021) 来自62个田地的土壤样本中.
- 在2021年和2022年的生长季节进行了实地调查,以评估PED严重程度和代表性领域的产量损失.
- 用PCR分析植物样本以检测C. coccodes的存在.
主要成果:
- 在71% (2020) 和45% (2021) 的被调查田地中检测到Verticillium dahliae,而V. albo-atrum是罕见的.
- 较高的V. dahliae土壤含量通常与增加PED症状和偶尔的产量减少有关.
- 在植物组织中,Colletotrichum coccodes是普遍存在的 (59%在2021年,41%在2022年),并且在生长季节中比V. dahliae在2022年更早地检测到.
- 一些V. dahliae土壤种群较低的田地仍然表现出PED症状,这表明了额外的促成因素.
结论:
- Verticillium dahliae是一种广泛的病原体,与阿尔伯塔省南部的土豆早期死亡有关.
- 虽然V. dahliae是关键因素,但其他土壤传播的病原体,如Collettotrichum coccodes和潜在的其他不具特征的病原体,有助于PED的发展和严重程度.
- 需要进行进一步的研究,以充分阐明导致PED的病原体在该地区的复杂相互作用.
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