冬小麦不同抗旱生态型的对应分析

对应分析可用于冬小麦不同抗旱生态类型的研究。本文简要介绍了对应分析的原理。通过对十五个冬小麦品种(系),二十一个性状的对应分析,结果表明:供试材料被划分为三个抗旱生态型。抗旱类型的基本特征为:旗叶基角较大,旗叶弯曲度较小,株高较高,顶部三叶总面积较小,穗部三粒小穗比率(占穗部总小穗数)较大,四粒和五粒小穗比率较小。水地类型则相反。中间类型介于二者之间。

Correspondence Analysis of Different Drought Resistance Ecotypes of Winter Wheat

The method of correspondence analysis was generally reviewed which was suitable for studying ecotypes with different drought resistan- ce in winter wheat. Fifteen winter wheat varieties (lines) with 21 chara- cters were investigated by using method of correspondence analysis. The results showed that all varieties (lines) could be classified into three ecotypes with different drought resistance. The basic characteri- stics of drought resistance eeotype were as follows, wider basal angle and smaller bent degree of flag leaf, larger plant height, smaller total area of upper three leaves, larger ratio of three--grain spikelets number (to the tatol spikelets number of an ear), smaller ratio of four--grain and five--grain spikelets number. The ecotype that adapted to grow in wet soil was contrary to the drought resistance eeotype. The intermedi- ate ecotype as expected was between the two ecotypes mentioned above.