不同玉米品种对草地贪夜蛾抗性的评估及其在防治中的应用前景

草地贪夜蛾Spodoptera frugiperda(J.E.Smith)是今年入侵我国的农业害虫,对我国的玉米等主要粮食作物产生了重要威胁。在草地贪夜蛾有可能成为我国新的长期粮食害虫的背景下,评测不同玉米品种对草地贪夜蛾的抗性,以确定潜在的高抗性品种,对后续培育抗虫品种有重要的指导意义。由于草地贪夜蛾原产于美洲热带及亚热带地区,且玉米的原产地与种内多样性也主要存在于美洲地区,因此以往大部分玉米品种抗虫性评测研究也主要集中于国外。本文汇总了近年来不同玉米品种对草地贪夜蛾抗性的评估结果,简单介绍了关于玉米对草地贪夜蛾抗性机制的研究进展,并结合玉米抗虫研究的经验及国内玉米遗传多样性研究的现状,提出了充分结合玉米种内多样性与多组学数据分析的研究方法,从而快速确定抗性相关的遗传位点与基因,用于现有高产优良玉米杂交品系对草地贪夜蛾抗性的改良。

Evaluation of resistance against fall armyworm, Spodoptera frugiperda(J.E.Smith) among diverse Zea mays cultivars and itsapplication prospect in pest management

Fall armyworm, Spodoptera frugiperda (J.E.Smith), is a newly invaded agricultural pest in China. Since its invasion in January 2019, it has proven a significant threat to production of maize and other major crops in the country. As fall armyworm will likely hinder as a perennial agricultural pest in China, evaluation of diverse maize cultivars for their resistance level to unearth potential resistant genotypes has become critical for breeding resistance into elite hybrids. Since both fall armyworm and maize originated from tropical and subtropical America, the majority of fall armyworm resistance tests in maize were done in this area. This review summarized recent results from these tests, and briefly introduced research progress on fall armyworm resistance mechanisms in maize. Integrating learnings from the broader maize insect-resistance literature and current status of maize genetic diversity study in China, a multi-omics analyses-based approach has been suggested to efficiently pinpoint resistance-related genetic loci or genes for improvement of fall armyworm resistance in elite maize hybrids.