墨西哥的Aphanomyces astaci:来自矮鱼Cambarellus montezumae的一个新单元型
Laura Martín-Torrijos1, Ariadne Hernández-Pérez2, Jorge Francisco Monroy-López3
1Department of Mycology, Real Jardín Botánico-CSIC, Plaza Murillo 2, 28014 Madrid, Spain.
Journal of invertebrate pathology
|October 8, 2023
概括
瘟疫病原体Aphanomyces astaci在墨西哥被发现,由当地Cambarellus montezumae携带. 这一发现凸显了研究其在北美鱼物种中的分布的必要性.
科学领域:
- 水生生态学 水生生态学
- 传染性疾病 传染性疾病
- 菌类学 菌类学是指菌类学.
背景情况:
- 瘟疫是由阿法诺米塞斯阿斯塔奇 (Aphanomyces astaci) 引起的,它摧毁了欧亚大陆的种群.
- 由于它们的免疫反应,北美作为A. astaci的慢性载体.
- 病原体A. astaci起源于美国东南部,与Cambaridae家族的起源相吻合.
研究的目的:
- 在墨西哥调查阿法诺米切斯阿斯塔奇的存在和遗传多样性.
- 为了确定墨西哥本土的鱼种是否携带A. astaci.
- 评估墨西哥A. astaci存在对敏感的鱼种群的影响.
主要方法:
- 对小 (rrnS) 和大 (rrnL) 线粒体核糖体区域的分析.
- 用DNA测序来识别A. astaci的单元类型.
- 在墨西哥对Cambarellus montezumae种群的现场采样.
主要成果:
- 阿法诺米切斯阿斯塔奇在墨西哥首次被检测到在Cambarellus montezumae.
- 鉴定出了两个不同的A. astaci类型:d1-类型和一个新的mex1-类型.
- C. montezumae 个体似乎是慢性携带者,没有鱼瘟疫爆发的迹象.
结论:
- 墨西哥A. astaci的存在证实了它在Cambaridae家族的分布范围内的分布.
- 这些发现引发了对南美敏感的鱼物种 (例如,Parastacidae) 的担忧.
- 进一步的研究对于了解A. astaci在北美载体物种中的分布和遗传多样性至关重要,特别是在尚未探索的地区.
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