应用系统聚类方法筛选持久抗瘟性水稻品种  

Application of Cluster Analysis on Screening Rice Varieties with Durable Resistant to Rice Blast

作　　者：肖放华[1] 陈勇[2] 彭绍裘[1] 肖应辉[3] 梁斌[2] 刘二明[1] 黄费元[1] 

机构地区：[1]湖南省农业科学院植物保护研究所,湖南长沙410125 [2]云南省农业科学院农作物品种资源站,云南昆明650205 [3]湖南农业大学植物科技学院,湖南长沙410128

出　　处：《中国水稻科学》2001年第3期225-228,共4页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目;国家"九五"科技攻关资助项目

摘　　要：以 Tetep、Moroberekan、B40为抗、感对照 ,用 8个抗性组分 ,对 47个云南地方稻种资源的抗瘟性进行了系统聚类分析。结果表明 ,可以较好地将 1996～ 1999年的 5 0、2 7、16、11个品种分别分成 6、6、4、3类。持久抗病对照品种 Tetep(感～抗 )分布于 1、2、4类内 ,但较集中于第 2类内 ;持久抗性品种 Moroberekan(感～中抗 )集中于第 2类内 ;云南地方品种大白谷、毫弄早、毫玉浪每年同聚于第 1类品种中 ,经连续几年试验 ,均表现出比 Tetep和 Moroberekan较稳定和较强的抗瘟性。第 3、5、6类为感病品种 ,其中第 3类感病对照品种 B40历年与其他品种间的距离较其他品种相互间聚类距离大 ,属高度感病。连续4年的试验结果表明 ,系统聚类分析可作为水稻持久抗瘟性品种筛选的方法。Eight resistant indexes being used as appraisal standards to rice blast,cluster analysis were conducted on 47 Yunnan local rice varieties and Tetep (a rice variety with durable resistance to rice blast) , Moroberekan (a rice variety which is conceived as durable resistance to rice blast) and B40 (a rice variety with high susceptibility to rice blast). The results showed that all rice varieties examined each year from 1996 to 1999 could be divided into six, six, four and three groups respectively. Two resistant control varieties, Tetep and Moroberekan, were divided into the groups moderately resistant to susceptible to rice blast. However, three Yunan local rice varieties, Dabaigu, Haolongzao, and Haoyulang had higher resistance to rice blast than that of the two resistant control varieties. The results from four years also showed that cluster analysis could be an objective and practical method for screening rice varieties which are resistant to rice blast.

关 键 词：水稻 持久抗性 稻瘟病 系统聚类分析 品种资源 

分 类 号：S511[农业科学—作物学]