The effect of temperature and host plant resistance on population growth of soybean aphid (Aphis glycines) biotype 1

Soybeans expressing the Rag1 gene for resistance have been shown to be effective against biotype 1 of the soybean aphid (SBA), Aphis glycines. However, no previous study has investigated the interaction between temperature and host plant resistance on SBA populations. In addition to direct effects of temperature on SBA population growth, we posed the hypothesis that the expression of plant resistance would decrease at higher temperatures. To test this hypothesis SBA were reared in growth chambers on seedlings of a susceptible and resistant soybean line at four temperatures: 15, 20, 25, and 30⁰C. Results showed that both temperature and plant resistance affected SBA fitness, and that there appeared to be an interaction of the two factors for some SBA responses (survival and development rate). In addition, there was evidence that the level of plant resistance increased at the highest temperature. These findings will be useful for making predictions of SBA populations on resistant plants under different seasonal temperatures. 

---

See more of: Student Competition Posters Undergraduate and M.S. - MUVE, P-IE Session
See more of: Student Poster Competition

<< Previous Poster | Next Poster >>