优质蛋白玉米自交系与普通玉米自交系产量配合力分析及其遗传关系研究

Study on yield combining ability and genetic relationship between quality protein maize inbreds and domestic temperate common maize inbreds

采用NCⅡ设计,以Mo17、丹340、黄早四、掖478为测验种,24个QPM优良自交系为被测系,分析了产量配合力和杂种优势的表现,根据产量配合力及杂种优势表现研究24个QPM自交系与4个测验种之间的遗传关系。研究结果表明,24个被测系中,产量一般配合力(GCA)最高的为齐205(23.81),其次为Pozarica8761(19.50);CA307与丹340之间的特殊配合力(SCA)效应值最高(37.84),其次为Si204-2早熟与黄早四(34.67);产量杂种优势最大的组合为齐205×丹340,其产量对照优势为34.96%,其次为H152-1-2×丹340,产量对照优势为34.75%;与Lancaster群遗传关系较近的被测系为:CML171、齐205、中系096/o2、CML170;与旅大红骨群遗传关系较近的被测系为:CML165、CML161、CML166、Si204-2早熟、新自330/o2-2、长631/o2-1、忻9101-1/o2、ZPL108/o2-7-2、新自401/o2;与四平头群遗传关系较近的被测系为:CML172-1-2-2、Pozarica8761、CA10139、H152-1-2、8129、忻9102-4/o2;与Reid群遗传关系较近的被测系为:Si204-1-1、CML163、CA307、长709/o2、8065QPM。

By NCⅡ mating design, four key domestic temperate maize inbred lines Mo17, Dan340, Huangzaosi and Ye478 were used as tester to cross with 24 Quality Protein Maize（QPM） inbred lines. Based on the yield combining ability and heternsis of those crosses, the results indicated that Qi205 had the highest yield general combining ability（GCA）, followed by Pozarica8761. Combinations of CA307 × Dan340 and Si204-2zaoshu × Huangzaosi had the highest special yield combining ability（SCA）. The lines Qi205 had the greatest relative heternsis with Dan340, the second was H152-1-2 × Dan340. Lines CML171, Qi205, Zhongxi096/o2 and CML170 showed closer genetic relationship with Lancaster germplasm, so did lines CML165, CML161, CML166, Si204-2Zanshu, Xinzi330/o2-2, Chang631/o2-1, Xin9101-1/o2,ZPL108/o2-7-2 and Xinzi401/o2 with Ltida Red Cob group,CML172-1-2-2, Pozarica8761 ,CA10139,H152-1-2,8129 and Xin9102-4/o2 with Sipingtou gerrnplasm and Si204-1-1 ,CML163 ,CA307,Chang709/o2 and 8065QPM with Reid germplasm.