| 摘要: |
| 用不同品种棉花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，部分感虫品种与高抗品种间的差异显著。运用逐步回归分析，建立了棉叶中五个影响因子（棉酚、单宁、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，得知第一主成分主要反映棉酚、单宁、抽腺的作用，第二主成分主要反映总糖、总蛋白的作用。根据第一、第二主成分对样本进行了分类，与田间鉴定结果相近。 |
| 关键词: 棉花 品种 棉铃虫 抗虫性 |
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| Abstract: |
| There were significantly different relative growth rates, relative consumption rates, ap proximate 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 five effective fac tors, namely, the contents of gossypol, tannin, total protein, total sugar, monosaccharides, was devel oped by applying stepwise regression analysis method. The result of principal component analysis showed that the first component dealt with the action of gossypol, tannin and oil glands, and the second compo nent with that of total sugar and total protein, the ordination results determined by the two coordinates were similar to that of field identification. |
| Key words: cotton varieties,cotton bollworm,resistance to insect |
