[Effects of UV-radiation on biological characteristics of different body-color biotypes of Sitobion avenae (Fab.)].
UV-radiation exerts strong selection stress on the evolution of aphid populations, and thus, leads to their genetic differentiation. However, the effects of UV-radiation on different body-color biotypes of aphids are still ambiguous. In this study, new-born nymphae of red and green biotypes of Sitobion avenae were placed on two wheat varieties (Xiaoyan-22 and Astron), bred in an artificial bioclimatic chamber under strict controlled conditions (at 15 degrees C, 20 degrees C, and 25 degrees C, and treated with 30 W lamp of UV-B for 30 min per day for 5 days), and their development duration, mass, and mean relative growth rate were measured. The results showed that at lower temperature, UV-radiation delayed the growth of green biotype aphid on Xiaoyan-22 and Astron significantly; while at higher temperature, UV-radiation significantly delayed the growth of red biotype aphid on Xiaoyan-22, but had lesser effects on the growth of the two biotypes on Astron, illustrating that different biotypes of aphids had different responses to UV-radiation, and the responses were correlated to temperature and wheat varieties.
Hu
Zu-Qing
ZQ
College Plant Protection, Northwest A&P University, Yangling 712100, Shaanxi, China. huzuqing@nwsuaf.edu.cn
Zhao
Hui-Yan
HY
Kang
Ju-Xia
JX
Hu
Xiang-Shun
XS
Li
Dong-Hong
DH
D000818:Animals; D001042:Aphids / Q000145:classification / Q000254:growth & development* / Q000528:radiation effects*; D013696:Temperature; D014908:Triticum / Q000145:classification / Q000469:parasitology*; D014466:Ultraviolet Rays / Q000009:adverse effects*