枯萎病对海岛棉产量因素及相关指标的遗传分析

以海岛棉抗病材料06-146和感病材料新海14的杂交群体为材料,考察了该群体的亲本、F1以及F2～F2∶5代家系,借助方差分析得到了枯萎病对其农艺性状和产量相关性状的影响。结果显示,随着病级的增加,株高、果枝数等性状低于对照,并且与产量相关性状下降明显。表现出了海岛棉枯萎病的致萎缩及减产的危害。运用相关分析和主成分分析,考察了病级与海岛棉产量因子之间的关系。结果显示,海岛棉产量与病级呈显著的负相关,同时与果枝数和株高呈负相关,也反应出枯萎病对海岛棉具有减产的作用。

Genetic Analysis on Effects of Sea Island Cotton Fusarium wilt on Yield Factor and the Correlation Indexes

The hybrid group of the disease-resistant sea island cotton 06-146 and the feeling sick sea island cotton Xinhai14 was studied to investigate the parents,the descendant of its F1 and F2-F2∶5 descents,the effect of Fusarium wilt of sea island cotton on the agronomic characters and yield was achieved by variance analysis.The result showed that the agronomic characters of the plant height and branch number were lower than those of the control group with the increase of the grade of disease.Also the characters related to cotton yield were significantly reduced,which showed the harmfulness of Fusarium wilt of sea island cotton.The correlations between the yield factors of the sea island cotton and degrade of diseases were obtained by principal component analysis.The result showed that the yield had negative correlation with the grade of the disease and the number of the cotton boll and the plant height.This also reflected that crop failure of sea island cotton could be caused by the cotton Fusarium wilt.