小麦高代新品系鉴定的聚类分析

采用系统聚类分析方法对小麦育种高代出圃品系进行了鉴定,依据小区产量、抽穗期、株高、穗长、公顷穗数、穗粒数、单穗重、千粒重、籽粒饱满度和角质率10个性状,将38个参试品系以离差平方和法在D2=2.083聚类水平下划分为5个类群,通过聚类分析了解各类群、类内品系之间以及与对照种的关系.初步评选出9个综合性状优良的新品系,描述了各个类群中品系的特性,为小麦高代品系鉴定提供了较为精确的定量鉴定方法.

Cluster analysis of wheat breeding lines tested in the identification nursery

The cluster analysis of wheat breeding lines tested in the identification nursery was conducted based up the 10 agronomic traits,such as plot yield,heading date, plant height,spike length,spikes/hm~2,grains/spike,spike weight,1000 grain weight, plump degree of grains and grain horni-ness.All the 38 strains could be classified into five groups according to the method of deviation square sum with D~2=2.083.The relationships of strains among groups or within a group and between each of them and the control variety could be clearly understood through the analyses.Nine strains with good integrated agronomic traits were screened out,and the strains in each group were characterized.Such analyses would be used as a method for more accurately and quantitatively identifying lines of high generation in the wheat breeding nursery.