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Inheritance of Resistance to Aphis glycines in Soybean P746 From China

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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.

Keywords: P746; antibiosis; aphid resistance; single dominant gene; soybean

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC12054

Publication date: December 1, 2012

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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