Soybean aphid intrabiotype variability based on colonization of specific soybean genotypes

被引:9
作者
Pawlowski, Michelle [1 ]
Hill, Curtis B. [1 ]
Voegtlin, David J. [2 ]
Hartman, Glen L. [1 ,3 ]
机构
[1] Univ Illinois, Dept Crop Sci, Natl Soybean Res Ctr, Urbana, IL 61801 USA
[2] Univ Illinois, Illinois Nat Hist Survey, Ctr Econ Entomol, Champaign, IL 61820 USA
[3] Univ Illinois, USDA ARS, Natl Soybean Res Ctr, Urbana, IL 61801 USA
关键词
Aphis glycines; biotype; biotype variant; soybean; soybean aphid resistance; RESISTANCE; BIOTYPES; HOMOPTERA; EVOLUTIONARY; INHERITANCE; DISCOVERY; RESPONSES; CLONES; GENE;
D O I
10.1111/1744-7917.12169
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is one of the most destructive insect pests on soybeans in the United States. One method for managing this pest is through host plant resistance. Since its arrival in 2000, 4 aphid biotypes have been identified that are able to overcome soybean aphid resistance (Rag) genes. A soybean aphid isolate collected from Moline, Illinois readily colonized soybean plants with the soybean aphid resistance gene Rag2, unlike biotypes 1 and 2, but similar to soybean aphid biotype 3. Two no-choice experiments compared the virulence of the Moline isolate with biotype 3. In both experiments, differences in aphid population counts were not significant (P > 0.05) on soybean genotypes LD08-12957a (Rag2) and LD11-5413a (Rag2), but the aphid counts for the Moline isolate were significantly (P < 0.05) lower than the aphid counts for the biotype 3 isolate on the soybean genotypes Dowling (Rag1), LD05-16611 (Rag1), LD11-4576a (Rag1), and PI 567598B (rag1b and rag3). The Moline isolate was a variant of aphid biotype 3, which is the first report showing that soybean aphid isolates classified as the same biotype, based on virulence against specific Rag genes, can differ in aggressiveness or ability to colonize specific host genotypes.
引用
收藏
页码:785 / 792
页数:8
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