不同小麦品种(系)株高及节间长度研究

Analysis of Plant Height and Internode Length of Different Wheat Varieties(Lines)

对矮秆、中秆、高秆共20个小麦品种(系)的株高及各节间长进行研究,结果表明:矮秆小麦主要是通过缩短不同节间长度来降低株高,特别是基部节间;株高相近的品种(系)同一节间占株高的比例基本相同,株高类型不同的品种(系)其节间比例的变化相对较大;两个小偃麦矮秆种质31504-1和31505-1株高构成指数IL明显大于其它小麦,说明其抗倒伏性更稳定,这对小麦株高的遗传改良具有重要意义。

This study analyzed the plant height and internode length of 20 wheat varieties （lines）.The results revealed that the decrease of plant height in dwarf wheat lines was determined by the decrease of internode length , especially the basal internodes .The proportion of the same internode to plant height was similar among materials with similar plant height , while it changed obviously in materials with different plant heights . The plant height component indexes of 31504-1 and 31505-1, two dwarf Trititrigia lines, were significantly larger than those of the other wheat materials , which suggested that their lodging resistance was more stable;so it was important for the genetic improvement of wheat .