【摘要】 以40份美国解密玉米自交系为被测系，以郑58、昌7-2、四144和四287为测验种，采用NCⅡ遗传交配设计组配160个杂交组合，2018和2019年分别在内蒙古通辽和赤峰、黑龙江齐齐哈尔、吉林公主岭进行田间不完全区组试验，分析产量性状表现、产量构成和产量性状配合力效应。结果表明，40份美国自交系中LH214、PHPR5、LIBC4、PHBA6、PHR58和PHWG5产量一般配合力较高，其中LIBC4与PHBA6两个自交系产量一般配合力高，且收获时子粒含水量一般配合力为负效应值，是东北地区较好的适宜机收种质供体。依据产量特殊配合力，40份自交系分为两个类群，SS群20份，NSS群20份。LH209×四-144、LH214×四-144、PHR55×昌7-2、PHPR5×四-287、MQ305×昌7-2、PHW30×郑58、LH215×郑58这7个杂交组合杂种优势较高，可作为重点利用组合。更多还原

【Abstract】 In this experiment, 40 American decrypted maize inbred lines were evaluated using Zheng 58,Chang 7-2, Si-144 and Si-287 as the testers, and 160 hybrid combinations were matched by NCⅡ genetic mating design. In 2018 and 2019, field incomplete block group experiments were conducted in Tongliao and Chifeng cities of Inner Mongolia Autonomous Region, Qiqihar City of Heilongjiang Province, and Gongzhuling City of Jilin Province, respectively, to analyze the yield trait performance, yield composition and yield trait combining ability effect.The results showed that among the 40 American inbred lines, LH214, PHPR5, LIBC4, PHBA6, PHR58 and PHWG5 had higher general combining ability of yield, among which LIBC4 and PHBA6 had higher general combining ability of yield, and the general combining ability of grain moisture content at harvest was negative effect value,which was a better germplasm donor suitable for mechanical harvesting in Northeast China. Based on the special combining ability of yield, 40 inbred lines were divided into two groups, 20 in the SS group and 20 in the NSS group.The seven hybrid combinations LH209×4-144, LH214×4-144, PHR55×Chang 7-2, PHPR5×4-287, MQ305×Chang 7-2, PHW30×Zheng 58, and LH215×Zheng 58 had high heterosis and could be used as key combinations.更多还原