16份美国玉米自交系配合力鉴定及利用潜力分析

Analysis of combining ability and utilization potential of 16 American maize inbred lines

以4个国内玉米自交系(郑58、昌7-2、四-144、四-287)为测验种,应用NCII遗传交配设计,对16份美国自交系进行配合力测定及对照优势分析。为筛选出配合力优良的美国玉米自交系,组配性状优良的杂交组合,分析供试美国玉米自交系利用潜力,为其合理利用提供依据。结果表明,供试美国自交系中LH205、2FACC、LH196、LH190产量GCA效应值表现优良,PHV37、PHW03、2FACC、LH163、LH206、LH220Ht、LH160、LH162适宜机械收获(宜机收)性状GCA表现优良。杂交组合LH160×郑58、2FACC×昌7-2、PHW43×四-144、LH195×四-287、LH220Ht×四-287、LH190×四-287、LH202×四-287的产量SCA效应值表现优良。2FACC×昌7-2、LH195×四287、2FACC×四-144、LH162×昌7-2、LH205×昌7-2、LH190×四287的产量TCA效应值表现优良。杂交组合2FACC×昌7-2、LH195×四-287、2FACC×四-144的产量对照优势较强,可进一步试验。

Using 4 domestic maize inbred lines（Zheng 58,Chang7-2,Four-144 and Four-287） as testing materials, the combining ability and check heterosis of 16 American maize inbred lines were evaluated by NCII genetic mating design.To screen the American maize inbred lines with good combining ability and hybrid combinations with excellent characteristics as well as to provide theory basis for their reasonable utilization, the utilization potential of the 16 American maize inbred lines were analyzed. Among the testing American inbred lines, the LH205, 2 FACC, LH196 and LH190 showed excellent product characteristics GCA effect; the PHV37, PHW03, 2 FACC, LH163, LH206, LH220 Ht,LH160, LH162 showed excellent machine-harvesting characteristics GCA effect. In hybrid combinations, the LH160 ×Zheng 58, 2 FACC ×Chang 7-2, PHW43 ×Four-144, LH195 ×Four-287, LH220 Ht ×Four-287, LH190 ×Four-287,LH202 ×Four-287 showed excellent yield characteristics SCA effect; the 2 FACC ×Chang 7-2, LH195 ×Four-287,2 FACC ×Four-144, LH162 ×Chang 7-2,LH205 ×Chang 7-2,LH190 ×Four 287 showed excellent output TCA effect; the2 FACC ×Chang 7-2, LH195 ×Four-287, and 2 FACC ×Four-144 showed excellent advantages comparing to the check,which can be further verified in following test.