17个玉米地方种质选系的杂优类群分析  

Analysis on Heterotic Groups of 17 Inbred Lines Derived Maize Landraces

作　　者：苟才明[1,2] 黄宁[2] 余世权[2] 荣廷昭[1] 

机构地区：[1]四川农业大学玉米研究所,四川雅安625014 [2]宜宾市农业科学院,四川宜宾644000

出　　处：《核农学报》2015年第5期821-829,共9页Journal of Nuclear Agricultural Sciences

基　　金：四川省科技计划(2010NZ0091);四川省"十二五"农作物育种攻关(2011NZ0098-2)

摘　　要：分析玉米地方种质选系的杂优类群和杂优模式,可以为探明自交系的应用价值和优势杂交种的配制提供技术支撑。本研究以17个从玉米地方种质中选育的自交系和11个测验种(包括西南地区常用骨干自交系以及代表西南地区玉米核心种质的5个标准测验种)为供试材料,利用SSR标记,进行了杂优类群划分;以17个新选系和11个测验种按不完全双列杂交组配的187个杂交组合为材料,通过单株产量测定,杂种优势估算,分析了杂优模式。结果表明,28个自交系间遗传相似系数较小,可分为4个杂种优势群,17个新选系有7个划入旅大红骨群,3个划入改良Reid群,4个划入PB群,3个划入四平头群;在各类群组配中,PB群地方种质选系(P1-1、P1-8和P1-10)与改良Reid群;PB群地方种质选系(P1-1、P1-6和P1-14)与旅大红骨群;改良Reid群地方种质选系(P1-15、P1-16和P1-17)与四平头群可产生较强的杂种优势,特别是PB群地方种质选系P1-1与改良Reid群组配获得强优势组合可能性更高。研究结果为新选系的应用和地方种质的进一步改良提供理论依据。This study was carried out to analyze the heterotic groups and heterotic pattern of inbred lines form maize landraces in order to provide the theoretical basis for assessing potential value of inbred lines and preparing dominant hybrid seed. The materials which were classified by using SSR markers were 11 testers （inclusive ： inbred lines of using commonly in southwest regions, 5 normal corn inbred lines which represented five main heterotic groups） , and 17newly inbred lines form maize landraces. The materials of estimating heterotic patterns were 187 combinations by crossing 17 newly maize inbred lines with 11 testers by NC Ⅱ mating design. Clustering analysis was done on the basis of the genetic similarity. Heterotic patterns were analyzed based on the data from the experiment and clustering analysis. The results showed that she 28 inbred lines could classified into 4 heterotic groups, group named Sipingtou contained 3 newly inbred lines, group named PB contained 4 newly inbred lines, group named Reid contained 3 newly inbred lines, and group named Luda Red Cob contained 7 newly inbred lines. Among the various populations, PB （P1 - 1, P1 - 8, and P1 - 10） × Reid and PB（PI-1, P1 -6, and P1 -14） × Luda Red Cob and Reid（P1 -15, P1 -16, and P1 -17） × Sipingtou could become superior combinations, especially newly inbred line P1 - 1× Reid become heterotic pattern. The heterotic groups analysis of inbred lines provided the basis for application of 17 newly inbred lines and improvement of maize landraces.

关 键 词：玉米自交系 地方种质 SSR标记 杂优类群 

分 类 号：S513[农业科学—作物学]