Identifying aphid resistance in the ancestral wheat Triticum monococcum under field conditions.
Identifying aphid resistance in the ancestral wheat Triticum monococcum under field conditions.
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DOI：
10.1038/s41598-021-92883-9
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发表时间：
2021-06-29
影响因子：
4.6
通讯作者：
Aradottir GI
中科院分区：
文献类型：
--
作者：
Simon AL;Caulfield JC;Hammond-Kosack KE;Field LM;Aradottir GI
小麦是一种重要的经济、社会和营养作物，但蚜虫的危害往往会通过取食和病毒传播降低小麦产量。通过田间表型分析，研究了小麦祖先种一粒小麦（Triticum monococcum（L.）蚜虫（禾谷缢管蚜Rhopalosiphum padi（L.），麦长管蚜Sitobion avenae（F.）和Metopolophium dirhodum（Wlk.））种群和天敌存在（寄生木乃伊蚜虫，瓢虫成虫和幼虫，草蛉卵和幼虫）对两个自然感病小麦品种，小麦（L.）变种Solstice和T. monococcum MDR 037和3个潜在耐药基因型T.在三年的田间试验中监测了单球菌MDR 657、MDR 045和MDR 049。一粒小麦MDR 045和MDR 049的蚜量较小，而MDR 657没有表现出抗性。总体而言，天敌存在与蚜虫种群呈正相关;然而，MDR 049与MDR 037具有相似的天敌存在，MDR 037易受蚜虫侵扰。据推测，在减少蚜虫种群增长的同时，MDR 049还通过吸引天敌来赋予间接抗性。在MDR 045和MDR 049中观察到的对蚜虫的抗性具有渗入到商业小麦品种中的强大潜力，这可能在减少蚜虫种群和病毒传播的综合害虫管理策略中具有重要作用。
Wheat is an economically, socially, and nutritionally important crop, however, aphid infestation can often reduce wheat yield through feeding and virus transmission. Through field phenotyping, we investigated aphid resistance in ancestral wheat Triticum monococcum (L.). Aphid (Rhopalosiphum padi (L.), Sitobion avenae (F.) and Metopolophium dirhodum (Wlk.)) populations and natural enemy presence (parasitised mummified aphids, ladybird adults and larvae and lacewing eggs and larvae) on two naturally susceptible wheat varieties, Triticum aestivum (L.) var. Solstice and T. monococcum MDR037, and three potentially resistant genotypes T. monococcum MDR657, MDR045 and MDR049 were monitored across three years of field trials. Triticum monococcum MDR045 and MDR049 had smaller aphid populations, whereas MDR657 showed no resistance. Overall, natural enemy presence was positively correlated with aphid populations; however, MDR049 had similar natural enemy presence to MDR037 which is susceptible to aphid infestation. It is hypothesised that alongside reducing aphid population growth, MDR049 also confers indirect resistance by attracting natural enemies. The observed resistance to aphids in MDR045 and MDR049 has strong potential for introgression into commercial wheat varieties, which could have an important role in Integrated Pest Management strategies to reduce aphid populations and virus transmission.
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