美国的四倍体小麦(Triticum turgidum)品系作为黑森蝇(Mayetiola destructor)抗性的来源

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY Journal of Applied Entomology Pub Date : 2024-02-17 DOI:10.1111/jen.13240
Subhashree Subramanyam
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摘要

采用抗性小麦栽培品种是控制双翅目害虫黑飞虱(Hf;Mayetiola destructor)破坏性影响的最经济、最环保的策略。目前,已发现 37 个 Hf 抗性基因,可用于防治迄今为止记录在案的 18 种 Hf 基因型。然而,Hf 种群在释放后的几年内迅速适应,克服了新部署的抗性基因,导致毒性 Hf 生物型的发展和植物抗性的崩溃。新的抗性来源的鉴定为育种者提供了额外的资源,可将其纳入育种计划,以培育出抗 Hf 的优良品种。在目前的研究中,我们筛选了来自美国不同地区的 374 个小麦(四倍体和六倍体)登录品系,发现了三个四倍体(Triticum turgidum)面条小麦品系,其中一个来自北达科他州(PI 639869),两个来自明尼苏达州(PI 352398 和 CItr 15710),在 20°C 时对 Hf 生物型 L 的抗性≥95%。此外,小麦栽培品种 PI 352398 对另外六个 Hf 基因型(包括生物型 B、C、D、O、GP 和 vH13)表现出 100% 的抗性。品系 PI 639869 和 CItr 15710 对大多数生物型也表现出 70% 的抗性,但前者对生物型 GP 和后者对生物型 B 的抗性除外。有趣的是,这两个品种的少数植株对这些生物型表现出假定的耐受性,植株生长正常,但有白色的活幼虫,细胞渗透性介于受 Hf 侵染的抗性小麦和感病小麦之间。此外,由于环境温度升高到 25-30°C 也会对 Hf 抗性产生负面影响,因此对三个 T. turgidum(PI 639869、PI 352398 和 CItr 15710)栽培品种在 30°C 下的 Hf 抗性进行了评估。没有一个小麦栽培品种在 30°C 时对 Hf 生物型 L 具有抗性,这表明抗性随温度而衰减,因此不适合环境温度较高的地区。综上所述,这三个小麦品系代表了更多的 Hf 抗性来源,育种者可以利用它们来培育耐久的优良品系。
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Tetraploid wheat (Triticum turgidum) lines from the United States as a source of Hessian fly (Mayetiola destructor) resistance

Deploying resistant wheat cultivars is the most economical and environment-friendly strategy to manage the devastating effects of the dipteran pest, Hessian fly (Hf; Mayetiola destructor). Currently, 37 Hf resistance genes have been identified to combat the 18 Hf genotypes documented so far. However, the Hf populations adapt rapidly to overcome the newly deployed resistance genes within a few years of release resulting in development of virulent Hf biotypes and breakdown of plant resistance. Identification of new and novel sources of resistance offers breeders additional resources that can be included in the breeding programmes to develop elite Hf-resistant cultivars. In the current study, we screened 374 wheat (tetraploid and hexaploid) accessions originating from different regions of the United States and identified three tetraploid (Triticum turgidum) pasta wheat lines, one originating from North Dakota (PI 639869) and two from Minnesota (PI 352398 and CItr 15710) exhibiting ≥95% resistance to Hf biotype L at 20°C. Further, the wheat cultivar PI 352398 showed 100% resistance to six additional Hf genotypes including biotypes B, C, D, O, GP and vH13. The lines PI 639869 and CItr 15710 also showed >70% resistance with most biotypes, except against biotype GP with the former and biotype B with the latter. Interestingly, a few plants from these two cultivars exhibited putative tolerance to these biotypes where the plants showed normal growth but harboured white, live larvae and showed cell permeability that was intermediate in levels between Hf-infested resistant and susceptible wheat. Additionally, since the increase in environmental temperatures to 25–30°C also negatively impacts Hf resistance, the three T. turgidum (PI 639869, PI 352398 and CItr 15710) cultivars were evaluated for Hf resistance at 30°C. None of the wheat cultivars were resistant to Hf biotype L at 30°C indicating a temperature-dependent breakdown of resistance and are therefore not suitable for geographical regions with higher environmental temperatures. Taken together, these three wheat lines represent additional sources of Hf resistance that can be leveraged by breeders for developing durable elite lines.

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来源期刊
CiteScore
3.40
自引率
5.30%
发文量
132
审稿时长
6 months
期刊介绍: The Journal of Applied Entomology publishes original articles on current research in applied entomology, including mites and spiders in terrestrial ecosystems. Submit your next manuscript for rapid publication: the average time is currently 6 months from submission to publication. With Journal of Applied Entomology''s dynamic article-by-article publication process, Early View, fully peer-reviewed and type-set articles are published online as soon as they complete, without waiting for full issue compilation.
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