不同株高小麦品种抗倒伏性与其亚性状及产量相关性研究

通过9个不同株高小麦品种抗倒伏性,以及与产量相关分析,结果表明,品种抗倒伏性是与生长环境关系密切,由若干亚性状构成的一个复合性状。其中,株高,第二节间长度,单茎鲜重要是决定品种茎倒伏指数的主要因素,前二者与品种的倒伏指数呈显著正相关,单茎鲜重与倒伏指数具有一定正相关,在不发生倒伏条件下,株高与产量具有正向相关,高产抗倒品种选育可以强秆为简便的选择指标,“矮中选高”和“高中选矮”有利于产量的提高。

Studies on the Lodging Resistance with Its Subtraits of Different Height Wheat Varieties and Correlation between Plant Height and Yield

The stem lodging resistance was investigated in 9 different height wheat varieties, the correlation between plant height and yield was also analyzed. The results showed that the lodging resistance of wheat variety was a compound of some subtraits, and the relationship was very close between the lodging resistance and the conditions of its life, the plant height, length of the 2nd inter nodes as well as the fresh weight of single stem mainly contributed the stem lodging index of wheat. There were significant correlation between the plant height, the length of 2nd basal internodes and stem lodging index respectively, the correlation between the fresh weight of single stem and stem lodging index was significant in some degree. When no stem lodging happened, the yield of wheat was positively correlated with the plant height. During the breeding for high yield and strong resistance to stem lodging wheat varieties, strong stem as a reliable and simple index should be paid more attention, selecting of higher individuals from dwarf populations or reverse also would benefit the increase of yield.