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1 December 2012 Inheritance of Resistance to Aphis glycines in Soybean P746 from China
Liang Xiao, Yunpeng Zhong, Junjie Zhang, Biao Wang, Tianlong Wu
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Abstract

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.

© 2012 Entomological Society of America
Liang Xiao, Yunpeng Zhong, Junjie Zhang, Biao Wang, and Tianlong Wu "Inheritance of Resistance to Aphis glycines in Soybean P746 from China," Journal of Economic Entomology 105(6), 2167-2171, (1 December 2012). https://doi.org/10.1603/EC12054
Received: 4 February 2012; Accepted: 27 July 2012; Published: 1 December 2012
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KEYWORDS
antibiosis
aphid resistance
P746
single dominant gene
soybean
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