【摘要】 本研究旨在解析甜高粱茎秆含糖锤度的变化规律，为甜高粱生物育种及生产实践提供理论依据。本研究以18份甜高粱品种为试验材料，通过方差分析、相关性分析、灰色关联度分析方法对不同时期茎秆含糖锤度、不同茎节含糖锤度、茎节与茎秆含糖锤度的关系进行分析。结果表明：甜高粱茎秆含糖锤度在时间维度上表现为S1、S2时期较低，S2-S3、S3-S4时期大幅增加，S4时期达到高峰；在垂直空间维度上表现为中部茎节含糖锤度最高，顶部、基部茎节含糖锤度较低，且不同茎节间含糖锤度随着茎节间垂直空间距离的增加正相关性逐渐变弱；另外不同茎节含糖锤度与茎秆含糖锤度关联次序为：基部茎节>中部茎节>顶部茎节，而中部茎节含糖锤度与茎秆含糖锤度数值最为接近。可见，在甜高粱生物育种过程中，中部茎节既可作为茎秆含糖锤度指示茎节，也是改良茎秆含糖锤度的突破口。更多还原

【Abstract】 To understand the variation of sugar content in sweet sorghum stem and provide theoretical basis for sweet sorghum breeding and production practices,18 sweet sorghum varieties were used as materials to analyze the sugar content in stalk at different times,different nodes,and the relationship between node and culm sugar content using variance analysis,correlation analysis,and grey relational degree analysis.The results showed that the sugar content in sweet sorghum stem varied in time,with lower values in S₁ and S₂ periods and a fastgrowing in S₂-S₃ and S₃-S₄ periods,reaching a peak in S₄ period.In the vertical spatial dimension,the middle node had the highest sugar content,while the top and bottom nodes had lower sugar content,and the correlation between sugar content in different nodes decreased as the vertical distance between nodes increased.In addition,the order of sugar content in different nodes was:base node> middle node> top node,and the sugar content in the middle node was closest to that in the culm.Therefore,in the breeding process of sweet sorghum,the middle node can be used as an indicator node for stem sugar content,and it is also a breakthrough point for improving stem sugar content.更多还原