江西甘蔗种质资源主要性状的变异与相关研究

以96份江西省甘蔗种质资源为材料,采用统计分析方法,研究甘蔗主要形态农艺、经济性状的变异程度和相关关系,主要研究结果如下:(1)甘蔗主要形态农艺和产量性状的变异系数存在很大差异,其差异大小顺序为分:蘖率,萌发率,株高,蔗糖产量,蔗茎产量,单茎重,有效茎,茎径,苗高,锤度,糖分。甘蔗主要形态农艺和经济性状的种质频数分布均近似于正态分布,但不同性状间有所差异,萌芽率、茎径、有效茎、蔗茎产量和蔗糖产量呈典型正态分布,分蘖率和单茎重呈左偏正态分布,苗高、株高、锤度和糖分呈右偏正态分布。(2)相关分析发现,萌发率与分蘖率呈极显著负相关、与单茎重呈显著负相关,与苗高呈极显著正相关、与有效茎呈正显著相关;分蘖率与苗高呈极显著负相关,与蔗茎产量呈显著正相关;苗高与蔗茎产量、蔗糖产量呈显著正相关;株高与锤度、糖分和有效茎呈极显著正相关;单茎重与蔗茎产量、蔗糖产量呈极显著正相关;有效茎与蔗茎产量呈极显著正相关,与蔗糖产量呈显著正相关;蔗茎产量与蔗糖产量呈极显著正相关。

A Study on the Main Character Variation and Correlation of Sugarcane Germplasm Resources in Jiangxi Province

96 sugarcane germplasms in Jiangxi Province were employed as the material,using the basic statistical analysis,the variation degrees and correlations of the morphological,agronomic and econmic characfers of the sugarcane germplasm resources in Jiangxi Province were studied.Major research results were showed as follows:(1) Basic statistical analyses showed that variation coefficients of main morphological,agronomical and yield traits were greatly different,the order of the coefficients was tillering rate,germination rate,plant height,sugar yield,sugarcane yield,weight per stem,effective stems,stem diameter,seedling height,birx,sugar content.Germplasm frequency distribution of the main traits in sugarcane was approximately normal distribution.Distributions of germination rate,birx,effective stems,sugarcane yield and sugar yield were typical normal distributions;distributions of tillering rate and weight per stem was left-deviated normal distribution;while distributions of seedling height,plant height,birx and sugar content was right-deviated normal distribution.(2) Correlation analyses indicated that the correlations of germination rate to tillering rate and tillering rate to seedling height were markedly and negatively significant;the correlation of germination rate to weight per stem was negatively significant.The correlations of germination rate to seedling height,weight per stems to sugarcane yield or sugar content,effective stems to sugarcane yield,sugarcane yield to sugar yield were markedly and positively significant;the correlation of germination rate to effective stems,tillering rate to sugarcane yield,seedling height to sugarcane yield or sugar yield,plant height to birx,sugar content to effective stems seedling height and,weight per stem to sugarcane yield or sugar yield,effective stems to sugarcane yield and sugarcane yield to sugar yield were positively significant.