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Biotypic Diversity in Greenbug (Hemiptera: Aphididae): Microsatellite-Based Regional Divergence and Host-Adapted Differentiation
- Source :
- Journal of Economic Entomology. 103:1454-1463
- Publication Year :
- 2010
- Publisher :
- Oxford University Press (OUP), 2010.
-
Abstract
- Nineteen isolates of the cereal aphid pest greenbug, Schizaphis graminum (Rondani) (Hemiptera: Aphididae), were collected from wheat, Triticum aestivum L.; barley, Hordeum vulgare L.; or noncultivated grass hosts in five locations from Colorado and Wyoming. Parthenogenetic colonies were established. Biotypic profiles of the 19 isolates were determined based on their abilities to damage a set of host plant differentials, and 13 new biotypes were identified. Genetic diversity among the 19 isolates and five previously designated greenbug biotypes (E, G, H, I, and K) was examined with 31 cross-species transferable microsatellite (simple sequence repeat) markers. Neighbor-joining clustering analysis of marker data revealed host-adapted genetic divergence as well as regional differentiation of greenbug populations. Host associated biotypic variation seems to be more obvious in "agricultural biotypes," whereas isolates collected from noncultivated grasses tend to show more geographic divergence. It seems that the biotype sharing the most similar biotypic profiles and the same geographic region with current prevailing one may have the greatest potential to become the new prevailing biotype. Close monitoring of greenbug population dynamics especially biotypic variation on both crop plants and noncultivated grasses in small grain production areas may be a useful strategy for detecting potentially new prevailing virulent biotypes of the greenbug.
- Subjects :
- Population
Zoology
Poaceae
Host-Parasite Interactions
Genetic variation
Botany
Animals
education
Phylogeny
Demography
education.field_of_study
Aphid
Genetic diversity
Ecology
biology
Host (biology)
Genetic Variation
food and beverages
Aphididae
General Medicine
biology.organism_classification
Genetic divergence
Aphids
Insect Science
Hordeum vulgare
Microsatellite Repeats
Subjects
Details
- ISSN :
- 00220493
- Volume :
- 103
- Database :
- OpenAIRE
- Journal :
- Journal of Economic Entomology
- Accession number :
- edsair.doi.dedup.....89ba08926c3e2b3d6c2cfa68bb583497