Biotypic status of Russian wheat aphid (Homoptera: Aphididae) populations in the United States

• Published in: Journal of economic entomology Vol. 90; no. 6; pp. 1684 - 1689
• Main Authors: Shufran, K.A. (Plant Science and Water Conservation Research Laboratory, USDA, ARS, Stillwater, OK.), Burd, J.D, Webster, J.A
• Format: Journal Article
• Language: English
• Published: Lanham, MD Entomological Society of America 01-12-1997
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; BIOTIPOS; BIOTYPE; BIOTYPES; CLONE; CLONES; COLORADO; DIURAPHIS NOXIA; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; HORDEUM VULGARE; KANSAS; NEBRASKA; Pest animals; Pest resistance; RANDOM AMPLIFIED POLYMORPHIC DNA; RAPD; TRITICUM AESTIVUM; VARIEDADES; VARIETAL RESISTANCE; Varietal selection. Specialized plant breeding, plant breeding aims; VARIETE; VARIETIES; WASHINGTON; WYOMING; Aphidoidea; Monocotyledones; Genetic variability; Hordeum vulgare; Insecta; Diuraphis noxia; Cereal crop; Germplasm; Pest; Homoptera; Random amplified polymorphic DNA; Gramineae; Animal plant relation; Arthropoda; DNA; Insect resistance; Angiospermae; Aphididae; Biotype; Spermatophyta; Invertebrata; Triticum aestivum
• ISSN: 0022-0493; 1938-291X
• DOI: 10.1093/jee/90.6.1684

Baseline information on the biotypic status of Russian wheat aphid, Diuraphis noxia (Kurdjumov), populations in the United States prior to the commercial planting of Russian wheat aphid-resistant small grains is reported. Ten Russian wheat aphid clones, collected from 5 states, were evaluated for biotypic variation on 4 wheat, Triticum aestivum L., and 2 barley, Hordeum vulgare L., germplasm entries. Although minor statistical differences were detected in measurements of chlorosis, root weight, aphid numbers, and aphid weight among some clones, host responses to Russian wheat aphid infestation among the 10 clones were similar. No genotypic differences were detected among the aphid clones based on random amplified polymorphic DNA profiles. Ten years after its introduction to the United States and before the commercial release of resistant cultivars, the Russian wheat aphid has not exhibited biotypic variation like that found in another cereal aphid, Schizaphis graminum (Rondani). It has been previously shown that Russian wheat aphid populations from other parts of the world exhibit considerable biotypic variation. Thus, with the threat of future introductions into the United States, Russian wheat aphid should be periodically monitored for biotypic variation, before and after the deployment of resistant cultivars