小麦不同粒位、粒重及其种子活力研究

Study on Grain Weight in Different Part of Wheat Ear and Its Seed Vitality

对４个小麦品种各粒位上的粒重及种子活力进行了研究。结果表明：各粒位的粒重差 异显著，其大小在麦穗上的分布具有明显的区域性。穗中下部小穗的第１、２花位籽粒最大（ ４３．９ｍｇ），上部小穗及中部高位小花所结籽粒最小（２６．２ｍｇ），除种子大小影 响种子活力外，粒重相同的种子，位于下部小穗上的籽粒具有较高的种子活力。

This paper studied the grain weight in different parts of wheat ear and its seed vitality. The results were as follows: there is significant difference in grain weight of different parts per ear, and it may be divided into three types,i.e. The seed vitality in diffe rent parts of wheat ear was variable.