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Student 10-Minute Paper

Systematics, Evolution, and Biodiversity

Student Competition

Student

Grad Competition SysEB: Ecology 2

Genetic differentiation in pecan aphid populations

Monday, November 6, 2023
11:06 AM – 11:18 AM ET
Location: Gaylord National Resort & Convention Center, Chesapeake B-C
In-Person Student Competition
Pecan crops in the United States are infested by three different aphid species. All three aphid species are invariably present throughout the native and expanded range of pecan-producing states in the nation. However, aphid populations in this extended geographic range of pecan production experience differential climatic and cultural practices, especially exposure to insecticide applications. We hypothesize that due to differential selection factors, aphid populations would be adapted to certain climatic regions and therefore could exhibit genetic differences at the population level. Populations of pecan aphids collected from a number of pecan-growing states across the United States were subjected to genetic analysis by comparing gene sequences. Results will be discussed in light of production practice differences and the potential influence of climate on observed genetic diversity among aphid populations.