摘要
The general combining ability（GCA）, special combining ability（SCA） and genetic parameter of ten characters of 22 maize inbred lines including plant height and ear height were analyzed using 10×12 through incomplete diallel cross（NC Ⅱ）.The results showed that：（1） Among the 22 maize inbred lines, the yield GCAs of11 HN 097, 11 HN 099, 11 HN 105 and 11 HN 110 were high, which were elite inbred lines to collocate hybridized combinations with strong heterosis. The yield of11 HN110 × 11 HN097, 11 HN110 × 11 HN105, 11 HN112 × 11 HN 097 and 11 HN 106 × 11 HN 104 were in the first four place. The yielding abilities, adaptabilities and yielding stabilities of the four combinations can be further identified by experiment. The heredities of the ten characters were mainly controlled by additive gene effect whereas the influence of non-addictive gene effect was small. The narrow heritabilities of plant height, ear height, ear rows, ear length, kernels per row,100-grain weight and seed-producing percentage were more than 50%. The variances were mainly caused by heredity and early-generation selection should be conducted. The narrow heritabilities of ear diameter, bare tip length and yield was low, which should not be selected in early-generation.
利用10×12按不完全双列杂交设计(NCⅡ),对22个玉米自交系的株高、穗位高等10个农艺性状的一般配合力(GCA)、特殊配合力(SCA)和遗传参数进行了分析。结果表明:(1)22个自交系中,11HN097、11HN099、11HN105、11HN110的产量GCA效应较高,是组配强优势杂交组合的优良自交系;11HN110×11HN097、11HN110×11HN105、11HN112×11HN097、11HN106×11HN104产量居前4位,这4个组合可进一步通过试验来鉴定其丰产性、适应性、稳产性;10个性状的遗传以加性基因效应为主,受非加性基因的作用较小;株高、穗位、穗行数、穗长、行粒数、百粒重、出籽率的狭义遗传率大于50%,其变异由遗传引起的比重较大,易在早代进行选择;穗粗、秃尖和产量的狭义遗传率低,不宜在早代选择。
基金
Supported by"Study on New Method and Technology of Maize Breeding"of the 12th Five-Year Plan in Chongqing(cstc 2012 gg C 80003)
"Study on Maize DH Breeding Technology and New Variety Breeding"of the 12th Five-Year Plan of National Science and Technology Plan Project in Rural Areas(2012 AA 101203-2)
"Basic Work of Special Agricultural Science and Technology"(cstc 2013 yykfc 80002)
"National Maize Industry Technology System"(CARS-02-74)
Fundamental Research Project"Genetic differences DH maize lines~~
