吉林省玉米骨干亲本的亲缘系数分析

Coefficient Analysis on Elite Maize Inbred Lines in Jilin Province

对吉林省19782012年获奖的71个普通玉米品种亲本自交系中的93个自交系进行亲缘系数分析,探讨其遗传多样性。结果表明,供试材料COP值变异范围为00.937 5平均值为0.028 5。利用自交系间遗传距离,采用兰氏距离类平均法进行聚类分析,将供试材料聚为6个类群,A类群包括黄早四、自330、428等20个自交系;B类群包括81162、四273、丹340等8个自交系;C类群包括Mo17、吉846、吉63等15个自交系;D类群包括U8112、铁7922、沈5003、K10、7884-7Ht等21个自交系,除长3和英64外,均含有国外玉米种质的血缘;E类群只有1个自交系丹599-20-1单独聚类;F类群共有28个自交系,包括国外杂交种选系14个,地方品种选系4个,未知来源自交系2个,综合种选系1个。

The coefficient of parentage（COP） among 93 elite inbred lines in Jilin province were analyzed by using the pedigree information. The inbred lines were the parents of the award winning maize varieties of Jilin province from 1978 to 2012. The results showed that the COP values between inbred lines varied from 0 to 0.937 5, with an average of 0.028 5. The tested materials were clustered into six groups based on genetic distance（l-COP） matrix with the unweighted pair group method with arithmetic means（UPGMA）. There were 20 inbred lines in A group included Huangzaosi, Zi330, 428, etc.; B group included 81162, Si273, Dan340, etc. 8 inbred lines; C group included Mo17, Ji846, Ji63 etc. 15 inbred lines; D group included U8112, Tie7922, Shen5003, K10, 7884-7Ht etc. 21 inbred lines, all of them had the blood relationship of the foreign maize germplasm except Chang3 and Ying64. E group only had one inbred line Dan599-20-1, that was clustered alone. There were a total 28 inbred lines in F group, included 14 foreign hybrids selected lines, four local varieties selected lines, two inbred lines of unknown origin, and one comprehensive selected line.