家蚕春用品种数量性状聚类分析方法

STUDIES ON CLUSTER ANALYSIS METHODS FOR QUANTITATIVE CHARACTERS IN SPRING SILKWORM

用19个家蚕春用种随机区组多性状研究数据进行遗传距离测算和聚类分析,与单区组设计"表型距离"和欧氏距离所作的聚类分析相比较,其结果"表型距离"和欧氏距离与遗传距离呈显著正相关,相关系数分别为0.97和0.90,他们的聚类分析结果也表现一致. 据此,春用种数量性状距离和聚类分析研究,可不设重复,能直接运用保育材料的观察数据进行多元分析,选择优良亲本和杂交组合.此法可大大节省人力,简化试验,加速育种进程,并为进一步研究提供参考.

A multi-character investigation data by ramdomed block design of 19 spring silkworm varieties (Bombyx morl.) were used to calculate the cluster analysis of 'phenotypic distance' and o's distance of the single block design. The results showed that both the phenotypic distance and O's distance expressed significant positive correlation with the genetic distance, the correlation coefficient was 0.97 and 0.90 respectively, and also indicated consistence with the results of their cluster analysis. Besides, these results might suggest a reference information, the experiment of quantity character distance and cluster analysis in sp- ring varieties, need not replications, directly use quantity character in- vestigation of the maintenance varieties to make multi-variete analy- sis, identify the better parents and superior heteric combinations. Such method may largely save the manpower and breeding materials, speed up the breeding process, provide the reference for further reseach work.