中国芝麻资源核心收集品研究  

Establishment of Sesame Germplasm Core Collection in China

作　　者：张秀荣[1] 郭庆元[1] 赵应忠[1] 冯祥运[1] 周明德[2] Toby Hodgkin 

机构地区：[1]中国农业科学院油料作物研究所 [2]中国农业科学院IPGRI东亚办事处

出　　处：《中国农业科学》1998年第3期49-55,共7页Scientia Agricultura Sinica

基　　金：IPGRI资助

摘　　要：对中国收集编目的４２５１份芝麻种质资源材料，依据来源、品种类别、生态类型３层分成１４个组。应用计算机系统对随机小样本的１４个性状数据进行聚类分析，选择确定了离差平方和法是芝麻资源聚类的适宜方法。通过组内聚类分析并结合随机选取和预选比例２０％的原则，预选出核心收集品材料８８４份，对其１４个性状的６个特征值的初步研究结果表明，基本代表了总收集品的遗传变异范围。对预选核心收集品在中国３个生态试验点两年的农艺性状鉴定表明：６个质量性状的５３０４性状次与原评价资料之间完全一致的为９７．８５％，３个数量性状呈良好的显著正相关。对决选的核心收集品代表性测验表明，１４个性状的平均值符合率达９７％以上，标准差符合率在９０％以上，表明核心收集品良好地代表了预选核心收集品。4251 Sesame (Sesame indicum L.) germplasm accessions collected, evaluated and catalogued in China were divided into 14 groups according to their origin, varietal type and ecotype. Based on the results from cluster analysis of 14 characters with random small sample by computerization, ward method was chosen as the best one for establishing sesame core collection. By application of ward method, 884 accessions were selected as precore collection through intragroup cluster analysis combining random selection with preselected proportion of 20% in the whole collections. Representational tests showed that preselected core covered genetic diversity of the whole collection by comparison of 6 values including Max, Min, Range, Mean, SD,CV of 14 characters analyzed. The preselected core was grown at 3 different ecological locations for investigation of agronomic traits from 1995～1996. It was found that the coincidance rate was 97.85% between 6 quality characters investigated in field tests and the original data. Significant positive correlations were also found between field investigation results and the original data for 3 quantitative characters including growth period, 1000seed weight and plant height. Final selection was carried out in group 6 and 7 in 1997. In representational test of final core collection, mean value coincidance rate was more than 97% and standard deviation coincidance rate was more than 90% in all 14 characters measured. Therefore, preselected sesame core collection was well representated by the final core selection.

关 键 词：芝麻 核心收集品 聚类分析 中国 

分 类 号：S565.302[农业科学—作物学]