Legume Biotechnology Laboratory of School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China.
J Econ Entomol. 2012 Dec;105(6):2167-71. doi: 10.1603/ec12054.
The soybean aphid (Aphis glycines Matsumura) is one of the most serious pests of soybean (Glycine max [L.] Merrill) worldwide. Aphid resistance genes have been identified. However, little is known about genes for resistance to Chinese soybean aphid strains. The objective of this study was to identify the type of aphid resistance in the soybean cultivar P746 and to determine the inheritance of the resistance. In choice and no-choice tests, significant differences in the average number of aphids and the damage index were observed between P746 and the susceptible cultivar Dongnong 47 11 d and 21 d after aphid infestation. F2 plants and their F2:3 families were tested to identify the mode of inheritance of resistance. The 240 F2 plants segregated into 178 resistant and 62 susceptible plants, which matched an expected 3:1 ratio for inheritance of a single dominant trait. Segregation among F2:3 families also matched a 1:2:1 ratio. These results indicated that a single, dominant gene mediated aphid resistance in P746. This information will be useful to soybean breeders developing antibiosis-resistant soybean cultivars.
大豆蚜（Aphis glycines Matsumura）是全球范围内大豆（Glycine max [L.] Merrill）的一种严重害虫。已经鉴定出抗蚜基因。然而，对于抗中国大豆蚜品系的基因知之甚少。本研究的目的是鉴定大豆品种 P746 的蚜虫抗性类型，并确定抗性的遗传方式。在选择和非选择试验中，在蚜虫侵染后 11 天和 21 天，P746 与易感品种东农 47 之间观察到平均蚜虫数量和损伤指数的显著差异。对 F2 植株及其 F2:3 家系进行了测试，以确定抗性的遗传方式。240 株 F2 植株分离出 178 株抗性植株和 62 株敏感植株，这与单显性性状遗传的预期 3:1 比例相匹配。F2:3 家系之间的分离也符合 1:2:1 的比例。这些结果表明，P746 中的单一显性基因介导了蚜虫抗性。这些信息将有助于大豆育种者开发抗生抗性的大豆品种。
