中文摘要：

以290份遗传多样性丰富的自交系为材料,研究不同种植密度下茎秆抗推力和纤维品质性状与茎秆抗倒性之间的关系;对不同杂种优势群的抗推力和纤维素含量进行多重比较,并筛选茎秆抗推力和纤维品质性状优良的自交系。结果表明：不同种植密度和不同自交系间的抗推力的显著性差异均达到显著水平。抗推力与纤维素含量在高密度和低密度条件下均呈极显著正相关关系。多重比较结果显示,高密度条件下的纤维素含量在不同类群间没有显著性差异,高密度和低密度条件下的抗推力和低密度条件下的纤维素含量存在类群间的显著性差异。不同杂种优势群中,抗推力和纤维素含量在两个密度下均表现稳定优良的自交系,瑞德群分别包括4个和3个,兰卡斯特分别包括1个和5个,P群分别包括2个和2个,旅大红骨分别包括2个和1个,塘四平头分别包括2个和1个。

英文摘要：

A total of 290 inbred lines with rich genetic diversity were used in this study. We investigated the relationship between stalk pushing resistance and fiber quality related traits with lodging resistance at different densities. Stalk pushing resistance and fiber quality related traits excellent performance lines were screened by multiple comparisons among different heterosis. The results showed that different lines had highly significant difference at different densities,furthermore,significantly positive correlation was studied between stalk pushing resistance and content of cellulose. The results of multiple comparison showed that content of cellulose among different heterosis had no significant difference at high density. Pushing resistance exist significant difference under two density and content of cellulose under low density among different heterosis. In different heterosis,the number of lines screened out with excellent performance about pushing resistance and content of cellulose under two density,and there were 4 and 3 lines in the Reid group,1 and 5 lines in the Lancaster group,2 and 2 lines in the P group,2 and 1 lines in the LRC group,2 and 1 lines in the Tang SPT group.