高油玉米自交系的杂种优势群划分和优势模式分析  

Analysis on Heterotic Groups and Heterotic Patterns of High Oil Corn Inbred Lines

作　　者：姜海鹰[1] 陈绍江[1] 高兰锋[1] 邢吉敏 宋同明[1] 戴景瑞[1] 

机构地区：[1]中国农业大学国家玉米改良中心,北京100094

出　　处：《作物学报》2005年第3期361-367,共7页Acta Agronomica Sinica

基　　金：国家自然科学基金 (3 0 170 5 64 )资助。

摘　　要：以分属Lancaster、Reid、塘四平头、旅大红骨和外引种质群等5个不同杂种优势群的代表性自交系Mo17、792 2、K12、丹340和870 1为测验种,以来自于BHO、ALEXHO、RYDHO、SYNDO等4个不同高油群体的2 0个自交系为被测系,利用NCⅡ设计分析了被测系的配合力、杂种优势群、杂种优势模式及其在生产实际中的利用价值。结果表明,2 0个高油自交系可分为2个杂种优势群,第一群主要为RYDHO(Reid高油)和SYNDO (SyntheticDiseasedOil)群体选系;第二群主要为ALEXHO(Alexanderhighoil)和BHO(北农大高油)群体选系。根据高油玉米种质的杂种优势类群和杂种优势利用模式划分结果,综合分析得出高油玉米种质与普通玉米种质杂种优势利用的9种模式,即ALEXHO×外引种质,ALEXHO×Reid ,ALEXHO×旅大红骨,BHO×外引种质,BHO×Reid ,RYDHO×Lancaster,RYDHO×塘四平头,SYNDO×外引种质,SYNDO×旅大红骨。其中ALEXHO×外引种质、ALEXHO×Reid、ALEXHO×旅大红骨、BHO×外引种质、BHO×Reid为5种主要模式。ALEXHO和BHO为选育优良高油玉米自交系的主要群体。The primary objective of this study was to estimate heterotic groups and heterotic pattern of a set of 20 newly elite high oil corn inbred lines from four high oil corn populations named BHO(Beijing High oil), ALEXHO(Alexander High Oil), RYDHO(Reid Yellow Dent High Oil) and SYN DO( Synthetic Diseased Oil). Five normal corn inbred lines Dan340, Mo17, 7922, 8701, K12 were adopted as testers, which were the typical representatives of five main heterotic groups named Lüda Red Cob, Lancaster, Reid, Exotic germplasm and Tangsipingtou in China. 100 crosses from NCⅡ design were grown in a randomized complete-block design experiment with three replications at three locations in 2002. The combining ability of 20 high oil corn inbred lines derived from four high oil corn populations was analyzed based on the data from the experiment. Cluster analysis was done based on SCA (Special combining ability) data. The results showed that the 20 lines could be classified into two heterotic groups. Inbred lines from RYD and SYN DO could be taken as one group, whose heterotic performance was similar to that of Reid, inbred lines from BHO and ALEXHO as another, whose heterotic performance was similar to that of Lancaster. The heterotic patterns among normal corn and high oil maize population were also analyzed. ALEXHO×Exotic germplasm, ALEXHO×Reid, ALEXHO×Lüda Red Cob, BHO×Exotic germplasm, and BHO×Reid were valuable heterotic patterns in high oil corn breeding.

关 键 词：高油玉米 自交系 配合力 杂种优势群 杂优模式 

分 类 号：S513[农业科学—作物学]