海岛棉产量性状和纤维品质性状的相关性

Research on the Relevance of Sea Island Cotton to Its Yield and Quality Traits

【目的】探讨海岛棉产量性状与品质性状的相互关系,为培育高产优质的海岛棉新品种提供依据。【方法】测定海岛棉06-146×新海14号的107个F2∶5家系的产量性状和纤维品质性状,利用SPSS软件进行关联度分析、通径分析、逐步回归分析和相关分析,明确其产量性状和品质性状之间的相互关系。【结果】产量性状受纤维品质的影响比较小;产量各性状对皮棉产量的通径分析表明,无论是直接通径系数还是最后的净效应值,其作用均是铃数>单铃重>衣分,偏重铃数和单铃重的选择,将有利于海岛棉产量的提高;品质性状的通径分析表明:直接通径系数大小排序依次为:上半均长>比强度>马克隆值>伸长率>整齐度;上半均长、比强度、马克隆值是影响纤维品质的最重要因素。【结论】产量性状受纤维品质的影响比较小;影响产量构成的三大因素为铃数、单铃重、衣分,偏重铃数和单铃重的选择,将有利于海岛棉产量的提高;然而上半均长、比强度、马克隆值是影响纤维品质的最重要因素。

【Objective】This project aims at discussing the correlation of the sea island cotton yield and quality characters and cultivating new varieties with high yield and superior quality.【Method】By measuring yield and fiber quality characters of 107 F 2: 5 population derived from sea- island 06- 146 and Xinhai14,and using the statistical analysis software SPSS 13. 0,relational degree analysis,path analysis,stepwise regression analysis and correlation analysis were conducted to definitize the correlation factors of the yield and fiber quality characters.【Result】The results showed that the yield was less affected by fiber qualityr. The restoring analysis of yield characters and the lint yield indicated that no mather what the direct path coefficient or the net domino effect value was,the effect was: all boll numbers > fiber strength > lint percentage. If particular stress is laid on selecting the boll numbers and lint percentage,the yield quality could be improved. The restoring menstrual analysis of fiber quality traits and the lint yield showed that the direct effect was: fiber length > fiber strength > micronaire > fiber elongation > fiber uniformity. Fiber strength and fiber micronaire were the leading factors affecting fiber quality.【Conclusion】The results showed that the yield was less affected by fiber quality. Partial relation and path analysis result of yield traits and yield showed that bolls number,boll weight and lint percentage were the three big yield elements,among which,bolls number contributed most to its yield, then followed by the boll weight and lint percentage.