棉花品种次生代谢物质含量差异对棉铃虫生长的影响

Influence of the Contents of Secondary Substance in Cotton Varieties on the Growth and Development of Cotton Bollworm Helicoverpa armigera(Hübner).

用不同棉花品种的嫩叶饲养棉铃虫幼虫，其相对生长率、相对取食量、近似消化率、食物转化率、食物利用率均不相同。感虫品种与高抗品种间的差异显著。运用逐步回归分析，建立了棉叶中６个影响因子（棉酚、单宁、油腺、总蛋白、总糖、单糖）与幼虫相对生长率之间关系的数学模型，并明确了各因子所起的作用。通过主成分分析，明确第１主成分为棉酚、单宁和油腺的作用，第２主成分为总糖。

There were significantly different relative growth rates, relative consumption rates, approximate digestibilities, food conversion rates and efficiencies in cotton bollworm larvae fed on different cotton varieties. A mathematical model reflecting on the relationship among the RGR and six effective factor, namely, the contents of gossypol, tannin, oil glands, total protein, total sugar, monosaccharides, was developed by applying stepwise regression analysis method. The results of principal component analysis showed that the first component dealt with the action of gossypol, tannin and oil glands, and the second component with that of total sugar and total protein.