玉米自交中代(S_3)及晚代(S_5)系配合力遗传及GCA相关性研究  

Heredity of combining ability and GCA correlative selection of Maize in S_3 and S_5 selfing-generations

作　　者：党拥华[1] 李克祥[1] 丁孝营[1] 王卫东[1] 王菁菁[1] 郑大浩[2] 

机构地区：[1]吉林市农业科学院作物所,吉林吉林132101 [2]延边大学农学院,吉林延吉133002

出　　处：《延边大学农学学报》2012年第3期191-196,共6页Agricultural Science Journal of Yanbian University

基　　金：延边大学科研启动基金

摘　　要：以来自同一个选系基础材料的5个高配合力和3个低配合力的S3世代系及其30个S5后代自交系为被测系,3个常规自交系为测验种,采用NCⅡ交配设计,对自交系配合力的遗传、配合力的相关选择等进行研究。结果表明,在自交S3世代不仅性状发生分离,而且各性状的配合力也发生分离。S3世代系配合力的高低与能否从中选出高配合力自交系关系密切,从高配合力S3系中选出高配合力自交系的概率远高于低配合力S3系,但不能保证从高配合力S3系中选出的自交系都具有高配合力的特性。自交系自身性状值与其配合力存在一定的相关性,但以S3系自身性状表现为依据的选择还不能替代配合力的选择。Study on the heredity and correlative selection of combining ability of maize in mid-generation was conducted.The NCII mating design was used with thirty eight S3 and S5 generateion lines crossed by testers of three normal inbreds.The results showed that the segregation of combining abilities of main agronomic traits of inbred lines in midi-generation was occurred.The opportunity of selecting elite inbred lines with high combining ability from parental S3 generation lines with high GCA was much higher than from those with low GCA.Nevertheless,not all of the inbred lines selected from parental S3 generation lines had the property of high GCA.In order to develop elite inbred lines,the test for combining ability of inbred lines in the late selfing-generation still needs to be conducted,combined with the test during mid-generation.Due to weak relations of agronomic traits of inbred lines with their combining abilities,the selection for combining abilities can not be replaced by the selection for agronomic traits of inbred lines.

关 键 词：玉米 自交系 世代 配合力遗传 

分 类 号：S513[农业科学—作物学]