The general combining ability effect and special combining ability variance of six quality characters (taste, transparency. protein, amylose content, gel consistency and gelatinization) of four Japonica type sterile l...The general combining ability effect and special combining ability variance of six quality characters (taste, transparency. protein, amylose content, gel consistency and gelatinization) of four Japonica type sterile lines,six restorer lines and their 24 combinations were statistically analyzed in the experiment,and on these grounds the parents were classified into 4 types, among which the Ⅰ and Ⅱ types were more ideal and ideal parent, respectively. The study has also showed that among the six quality characters taste is closely correlated to transparency. Hence, taste and transparency may be used as a sensory index for simple evaluation of qualities of Japonical hybrid rice, and form an important basis for rough selection in the earlier stage of breeding.展开更多
文摘The general combining ability effect and special combining ability variance of six quality characters (taste, transparency. protein, amylose content, gel consistency and gelatinization) of four Japonica type sterile lines,six restorer lines and their 24 combinations were statistically analyzed in the experiment,and on these grounds the parents were classified into 4 types, among which the Ⅰ and Ⅱ types were more ideal and ideal parent, respectively. The study has also showed that among the six quality characters taste is closely correlated to transparency. Hence, taste and transparency may be used as a sensory index for simple evaluation of qualities of Japonical hybrid rice, and form an important basis for rough selection in the earlier stage of breeding.
文摘一、前言聚类分析(Cluster Analysis)是数值分类(Numerical Taxoaomy)学中的一个新的分支,在很多领域得到了广泛应用,特别是系统聚类法(Hierachical Clustering Methods)是目前国内外使用最多的一种方法,类与类之间的距离的不同定义产生了系统聚类的不同方法,组平均(Group—avergae or average linking)法具有空间保持和单词性,在植物遗传育种中得到卓有成效的应用。自1936年,广义距离(Generalized Distance)提出以来,人们以广义距离作为分类统计量,用Rao(1952)的中枢压缩法(Pivotal Condensation)
