Legume host range and soybean host plant resistance for soybean tentiform leafminer, Macrosaccus morrisella (Lepidoptera: Gracillariidae).

Arthur V Ribeiro, Fábio M Führ, James P Menger, Joshua S Havill, Robert L Koch
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Abstract

The soybean tentiform leafminer, Macrosaccus morrisella (Lepidoptera: Gracillariidae), was known to feed on only two legumes native to North America, and it has recently expanded its host range to soybean, Glycine max (Fabales: Fabaceae). However, the threat to other legume crops and potential for host plant resistance for M. morrisella management in G. max is unknown. Thus, M. morrisella host range among different species of legume crops and genotypes of G. max were evaluated through complementary choice and no-choice experiments. Macrosaccus morrisella oviposited on its native host American hogpeanut (Amphicarpaea bracteata (Fabales: Fabaceae)) and G. max (both grain and vegetable types), but not on Phaseolus vulgaris, Vigna unguiculata, Cicer arietinum, Vicia faba, Pisum sativum, and Lens culinaris (Fabales: Fabaceae). Low oviposition was observed on Vigna radiata and Phaseolus lunatus (Fabales: Fabaceae) in a choice test, but no larvae survived on either legume. When G. max genotypes were compared, lower but detectable oviposition (50 to 100 eggs per plant) was observed on PI229358 and PI227687 in choice and no-choice tests, and lower survival rates (20 to 40%) on PI229358 and M15-105140 in a no-choice test. These results indicate that M. morrisella host range appears to be restricted to the previously known native hosts and G. max, but continued monitoring for adaptation to other legumes and further studies testing multiple populations of M. morrisella are necessary. Furthermore, sources of G. max with lower susceptibility against M. morrisella were identified and could be utilized in G. max breeding programs for the development of host plant resistance for M. morrisella management.

豆科寄主范围及大豆寄主植物对大豆蔓状叶螨的抗性。
大豆网状叶螨macrosacus morrisella(鳞翅目:豆科),已知仅以两种原产于北美的豆科植物为食,最近将其寄主范围扩大到大豆Glycine max (Fabales: Fabaceae)。然而,莫里菌管理对其他豆科作物的威胁和寄主植物的抗性潜力尚不清楚。因此,通过互补选择和非选择实验,对不同豆科作物中莫里梭菌的寄主范围和基因型进行了评价。morrisella在其本土寄主美洲大花生(Amphicarpaea bracteata (Fabales: Fabaceae))和G. max(谷物和蔬菜类型)上产卵,但在Phaseolus vulgaris, Vigna unguiculata, Cicer arietinum, Vicia faba, Pisum sativum和Lens culinaris (Fabales: Fabaceae)上没有产卵。在选择试验中,辐射豆和月牙豆的产卵量都很低,但没有幼虫成活。当比较G. max基因型时,PI229358和PI227687在选择和非选择试验中观察到较低但可检测的产卵量(每株50 ~ 100个卵),PI229358和M15-105140在非选择试验中观察到较低的存活率(20% ~ 40%)。这些结果表明,莫里菌的寄主范围似乎仅限于以前已知的本地寄主和G. max,但继续监测其对其他豆科植物的适应性以及进一步研究莫里菌的多个种群是必要的。此外,还发现了对莫里菌敏感性较低的G. max来源,可用于G. max育种计划,以开发莫里菌抗性的寄主植物管理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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