小麦单株有效分蘖数与农艺性状的相关性研究

The Dependence Study of the Effective Tillers Per Plant and Agronomic Characters in Wheat

对5个小麦品种单株有效分蘖数与其他农艺性状的相关性进行分析,结果表明,主茎适当的高度是小麦单株获得更多有效分蘖数的基础,而过多的有效分蘖导致不孕小穗数增加和穗粒数、单穗重降低。在高产实践中,通过控制有效分蘖来减少不孕小穗数以达到提高穗粒数和单穗重的目的。回归分析表明,不孕小穗数、穗粒数与单株有效分蘖数相关性较高,可以用第3个一级分蘖和第1个二级分蘖的农艺性状与单株有效分蘖数的回归方程预测其单株有效分蘖数。

The result of the dependence analysis to the effective tillers per plant and agronomic characters of 5 wheat varieties indicated that the properly plant height is a base to get more effective tillers,while excessive effective tillers will lead to increase of the number of sterile spike and reduce of grain number per spike and a spike weight.So it is neccessary to control the effective tillers to reduce sterile spike and to increase grain number per spike and per spike weight in high-yield.The regression analysis indicated that sterile spike,grain number per spike and the effective tillers per plant dependence were relatively high.Hence it is capable to use three grade 1 tiller and two grade 2 tiller of regression equation to predict their the effective tillers per plant.