海岛棉、陆地棉及杂交后代枯萎病抗性与产量因素的相关关系分析

Analysis of Correlation between Resistance of Island Cotton,Upland Cotton and Hybrid Progeny to Fusarium Wilt and Yield Factors

通过海岛棉品种、陆地棉品种、海陆杂交棉10Q株系、陆陆杂交棉44株系对枯萎病的抗性鉴定,分析枯萎病抗性对海岛棉品种、陆地棉品种、海陆杂交10Q株系棉花、陆陆杂交44株系棉花纤维长度、单铃纤维重等产量指标的影响,旨在阐明海岛棉枯萎病病情指数对产量性状的影响,在育种中选择高抗性品种以及合理布局抗病品种。结果表明,陆地棉与海岛棉枯萎病抗性的鉴定结果中,辽棉18号与新陆早13号高抗;10Q株系与44株系相比,10Q株系对枯萎病抗性高;在海岛棉品种中,相对病情指数与产量指标单铃纤维重为显著负相关关系(P<0.05);海陆杂交群体10Q株系中,相对病指与产量指标衣分、单铃籽棉重呈极显著负相关关系(P<0.01);与产量指标单铃纤维重呈显著负相关关系(P<0.05);陆陆杂交群体44株系中,相对病情指数与产量指标单铃籽棉重呈极显著负相关关系(P<0.01),与单铃纤维重呈显著负相关关系(P<0.05)。

This paper aims to study the resistance of island cotton varieties,upland cotton varieties,interspecific hybrid 10 Qseries,44 series to fusarium wilt and the impact of the resistance to fibre length,fibre weight per boll yield index,to clarify the island index of fusarium wilt with yield traits and to select high resistant varieties and reasonable layout of resistant varieties in breeding.The results showed:Liaoming No.18 and Xinluzao No.13 had higher resistance to fusarium wilt than others in the identification results of island cotton and upland cotton.The 10 Qseries,compared with the 44 series,had a high resistance to fusarium wilt.In the island cotton varieties,the relative disease index was negatively correlated with the weight of per boll fiber.Hybrid group 10 Qseries,the relative disease index was significantly negatively related with lint percentage,weight of per boll.The relative disease index had a significantly negative correlation with fiber weight per boll.In hybrid population of 44,the relative disease index and weight of per boll was extremely negatively related.The relative disease index was significantly negatively correlated with the weight of per boll fiber.