水稻拟禾本科根结线虫的发生及抗性基础

Occurrence of root-knot nematode Meloidogyne graminicola and resistant basis in rice (Oryza sativa L.)

  • 摘要: 水稻是世界主要栽培作物之一,也是世界众多人口的主要食物,但根结线虫病危害给水稻种植带来严重挑战。其中,拟禾本科根结线虫(Meloidogyne graminicola, Mg)是引起水稻根结线虫病的重要线虫病原之一,广泛分布于亚洲、美洲和南非等主要稻田种植区,成为制约水稻安全生产的重要生物因素。此外,在全球气候变暖趋势下,Mg种群结构呈由南向北扩展的趋势。本文综述了Mg在世界范围内的发生、分布、致病机理、抗病种质资源及抗性基因鉴定和当前的防控措施。探讨了未来气候变暖可能影响Mg的发生与分布,今后加强我国稻田Mg发病实时监测对于该病害的绿色防控极为重要。充分利用全基因组测序等技术手段深入挖掘新Mg抗性水稻资源、鉴定新抗性QTL/基因以及培育持久抗性的新品种是未来开展Mg绿色防控的主流方向;同时,探索Mg综合防控策略,将抗性水稻种质资源、生物防控技术和稻田栽培措施等进行组合运用,有助于进一步提高水稻线虫病害的防控效果,以保障我国水稻产业的安全生产。

     

    Abstract: Rice is one of the main cultivated crops and a staple food for many populations in the world. However, root-knot nematode diseases pose a serious challenge to the rice planting and production. Among them, Meloidogyne graminicola (Mg) is considered to be the main pathogenic nematodes causing rice root-knot disease. Mg is widely distributed in major rice growing regions such as Asia, America, and South Africa; and has become a key biological factor restricting the safe production of rice. Additionally, under the global trend of climate warming, the population structure of Mg is expanding from south to north. In this review, the research progress on Mg in rice production was summarized, mainly including the occurrence, distribution, pathogenic mechanism, identification of Mg-resistant germplasm resources and genes, and control methods. Meanwhile, the discussion emphasized the potential impact of climate warming on the occurrence and distribution of Mg. Strengthening of real-time detection of Mg occurrence in rice fields in China is crucial for effectively managing this disease. Utilizing advanced techniques like whole-genome sequencing to explore new Mg-resistant rice resources, identifying new quantitative trait locus (QTL) or genes associated with resistance, and breeding varieties with long-lasting resistance will be primary direction for future Mg control. Additionally, exploring comprehensive control strategies by integrating Mg-resistant rice germplasm resources, biological control techniques, and optimized rice cultivation practices will further improve the efficiency of controlling nematode diseases in rice and ensure the safe and sustainable production of China’s rice industry.

     

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