永良4号小麦主要经济性状变异与产量关系的研究

河套地区主栽近30年的小麦品种永良4号出现了植株整齐度下降、抗性衰退和品质变劣等严重现象,深入了解永良4号的性状变化情况,对指导生产有重要意义。对27年间区试资料中永良4号主要经济性状指标与产量进行了相关性、回归和通径等分析,结果表明,该品种主要经济性状已经发生明显变异,其中千粒重下降成为产量稳定性的主要负面效应之一。当前,针对河套地区的实际情况,在品种选育时注重高千粒重、多穗型新品种选育。

The Relationship between Main Economic Characters Variation of Yongliang 4 and Yield

Yongliang 4 was main cultivated cultivars for nearly 30 years in the Hetao area,appeared lower plant uniformity,resistance to the recession and the quality of variable inferior serious phenomena,should be deeply understand change of Yongliang 4 traits,which has a very important role in guiding production.Using regional test data of main economic characters variation for 27 years,the correlation,regression and path between main economic characters variation and yield were analyzed.The results show that: the main economic characters of variety have obvious variation which the thousand kernel weight has decreased and became one of the main negative effects of reduced yield.At present,according to the actual conditions of Hetao area,it is suggested wheat varieties selection could be based on higher thousand Kernel weight and multiple spike type.