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1 June 2013 Response of Wheat Germplasm to Infestation of English Grain Aphid (Hemiptera: Aphididae)
Fengqi Li, Lingrang Kong, Yusheng Liu, Hezhou Wang, Liang Chen, Junhua Peng
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Abstract

The English grain aphid, Sitobion avenae (F.), is a destructive insect pest of wheat. In this study, wheat germplasm was evaluated for resistance and tolerance to English grain aphid infestation. Except for spikelet number/spike, the 1,000-kernel weight, spike weight, grain weight/ spike, and sterile spikelet number/spike of infested plants were all significantly impacted by English grain aphid infestation. Of 292 wheat accessions, only one genotype showed English grain aphid high resistance, and most genotypes showed intermediate resistance. Tolerance index values ranged widely among all accessions, but 11 genotypes had high tolerance to English grain aphid. Different resistance and tolerance parameters were positively correlated. Five green bug-resistant genotypes had a betterEnglish grain aphid tolerance index than other genotypes. Eleven genotypes exhibited a high or moderate level of tolerance and moderate level of resistance to English grain aphid. The broad-sense heritability of 1,000-kernel weight loss rate and peak aphid density were also estimated. English grain aphid resistant and tolerant lines identified in our study will be helpful in future breeding programs.

© 2013 Entomological Society of America
Fengqi Li, Lingrang Kong, Yusheng Liu, Hezhou Wang, Liang Chen, and Junhua Peng "Response of Wheat Germplasm to Infestation of English Grain Aphid (Hemiptera: Aphididae)," Journal of Economic Entomology 106(3), 1473-1478, (1 June 2013). https://doi.org/10.1603/EC12327
Received: 11 August 2012; Accepted: 28 March 2013; Published: 1 June 2013
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KEYWORDS
English grain aphid
germplasm
resistance
tolerance
wheat
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