温度对转基因741杨抗虫性的影响

在不同温度下测定转基因741杨的抗虫性，发现转抗虫基因741杨的抗虫性与温度密切相关．随着温度的升高，舞毒蛾幼龄幼虫的总死亡率、累计死亡率均明显升高，且随着昆虫龄级的增加，幼虫对转基因株系和温度的敏感性逐渐降低．温度对取食对照株系的昆虫生长发育有促进作用．温度高，舞毒蛾幼虫的生长发育明显加快，历期缩短，各龄期体重、排粪量增长快，而以转基因杨饲喂的昆虫发育进度随温度变化差异不显著．对1998～2000年温度资料和相应的杨扇舟蛾死亡率建立了回归方程，各高抗和中抗株系的温度-昆虫死亡率曲线均表现为明显的回归关系．

Influence of temperature on insect-resistance of transgenic hybrid poplar 741

The study showed that the insect-resistance of transgenic hybrid poplar 741 was closely related with temperature. The total mortality and accumulative mortality of Gypsy moth (Lmantriadispar L.) larvae increased with increasing temperature, and the sensitivity of larvae to the clones of transgenic hybrid poplar 741 and temperature decreased gradually with the increasing instars. Temperature had a promotion to the development of larvae fed on CK. When the temperature was high, the development of larvae quickened, the development period shortened, and the weight increasing rate and the frass increasing quantity quickened, but the development rate of larvae fed on transgenic hybrid poplar 741 was not obvious with varied temperature. The regressive equation of temperature and Clostera anachoreta (Fabricius) mortality during 1998-2000 year indicated that high resistant and medium resistant clones' temperature-insect mortality curve presented an obvious regressive relation.