›› 2006, Vol. 49 ›› Issue (6): 955-962.

• RESEARCH PAPERS • Previous Articles     Next Articles

Evaluation of the effects of insect resistant cry1Ac/sck transgenic rice on the parasitoid communities in paddy fields

LIU Yu-Fang, HE Ling, WANG Qiong, HU Si-Qin, LIU Wen-Hai, CHEN Kang-Gui, YOU Min-Sheng   

  1. (School of Life Sciences, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China)
  • Online:2006-12-30 Published:2006-12-20
  • Contact: LIU Yu-Fang

Abstract: Effects of three transgenic rice lines (MSA, MSB and MSA4) and one transgenic hybrid rice line (KF6-304) with a fused double genes of cry1Ac and sck (cry1Ac/sck rice) on the parasitoid communities in paddy fields were investigated, and the ecological safety of these cry1Ac/sck rice lines were evaluated. Untransformed rice MH86 was used as the control for MSA, MSA and MSA4, while -YM86 as the control for KF6-304. The results showed that no significant differences were found both in overall situation and temporal dynamics of species richness, diversity, evenness and dominance indices of the parasitoid communities in paddy fields of different rice lines between the transgenic rice lines and their control rice lines, and the same when evaluated with the total number of individuals. However, cry1Ac/sck rice lines decreased the number of individuals of parasitoids at the middle stage of rice growth. The data of the function groups of parasitoids revealed that MSA and MSA4 increased the number of individuals of egg parasitoids at the beginning of late stage of rice growth, and all cry1Ac/sck rice lines markedly decreased the number of individuals of the function group of parasitoids which attacked the target pest Cnaphalocrocis medinalis, but had no significant negative effects on other function groups of parasitoids on no-target pest insects.

Key words: transgenic rice, cry1Ac/sck gene, pest-resistance, parasitoid community, function group