25份美国玉米自交系的利用潜力分析  

Analysis on Utilization Potential of 25 Expired Proprietary(Ex-PVP)U.S.Corn Inbred Lines

作　　者：赵鑫哲 刘文娟 张丰屹 杨致远 张德贵[2] 李明顺[2] 李新海[2] 雍洪军[2] 王宏伟[1] ZHAO Xin-zhe;LIU Wen-juan;ZHANG Feng-yi;YANG Zhi-yuan;ZHANG De-gui;LI Ming-shun;LI Xin-hai;YONG Hong-jun;WANG Hong-wei(Special Maize Institute,Shenyang Agricultural University,Shenyang 110866;Institute of Crop Science,Chinese Academy of Agricultural Sciences,Beijing 100081;Maize Research Institute of Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]沈阳农业大学特种玉米研究所,沈阳110866 [2]中国农业科学院作物科学研究所/作物分子育种国家工程实验室,北京100081 [3]四川农业大学玉米研究所,成都611130

出　　处：《玉米科学》2020年第6期25-30,共6页Journal of Maize Sciences

基　　金：国家重点研发计划项目(2016YFD0101201);国家玉米产业技术体系项目(CARS-02-02)。

摘　　要：采用NCII遗传交配设计,以优良玉米自交系CA193和CA749为测验种,与25份美国玉米自交系配制杂交组合,以吉单27和先玉335为对照,根据主要农艺性状表现、配合力和杂种优势分析,评价25份美国玉米自交系的育种利用潜力。结果表明,2MCDB、LH198、PHR63、LH184、PHHH9、MBWZ、PHJR5、LH186、PHT47、LH217、PHMK0、PHEG9和LH218自交系产量一般配合力较高,其中,5份自交系2MCDB、LH184、LH186、PHJR5和PHT47具有降低收获时含水量特点,PHT47和PHJR5具有增加穗行数、缩短生育期的优点,利用潜力最大。针对CA193和CA749产量低、穗行数少的缺点,遴选出2个组合CA193×PHT47和CA749×2MCDB,可作为基础群体用于自交系选育。3个组合CA193×PHT47、CA193×2MCDB和CA193×PHJR5产量显著高于吉单27,可用于杂交种选育。Twenty five expired proprietary(ex-PVP)U.S.corn inbred lines were crossed to two elite tester in-bred lines CA193 and CA749 by NCII genetic design.These crosses and two hybrid checks Jidan27 and Xianyu335 were evaluated for main agronomic traits in Gongzhuling of Jilin province and Harbin of Heilongjiang province to an-alyze the breeding potential of 25 ex-PVP U.S.inbred lines.The results showed that 13 inbred lines,including2 MCDB,LH198,PHR63,LH184,PHHH9,MBWZ,PHJR5,LH186,PHT47,LH217,PHMK0,PHEG9 and LH218,had high general combining abilities(GCA)effects for grain yield.Four of the 13 elite lines,2 MCDB,LH184,LH186,PHJR5 and PHT47,also showed the potential of reducing moisture content in harvest time.The inbred linePHT47 and PHJR5 had the best breeding potential for increasing ear row number and shortening growth period.Thetwo cross,CA193×PHT47 and CA749×2 MCDB,could be used to develop new lines targeting to the two lines CA193 and CA749,since they showed moderate yield and more row number per ear.The three high-yielding crosses com-paring to Jidan27 hybrid,CA193×PHT47,CA193×2 MCDB and CA193×PHJR5,could be tested to develop new hy-brids.

关 键 词：玉米 自交系 一般配合力 特殊配合力 对照优势 

分 类 号：S513.024[农业科学—作物学]