摘要
在48－2的众多姊妹系中，选出不同世代的姊妹系9个，配成姊妹种和改良单交种进行比较研究。结果表明：从S3分离形成的妹妹系配成的姊妹种，有一定的优势，有利于提高制种产量，且用它们配成的改良单交种，其经济产量和主要农艺性状与对应正常单交种基本一致；同时还表明：一个自交系的同一姊妹种，对其所配的各改良单交种，具有不同的特殊配合力效应。
Nine 48-2 sib-inbreds selected from S2. S3 and S4, their sibecrosses and modified hybrids were used to evaluated the effects maize modifiedhybrids. The results indicated that (1) sib-inbreds from S3 can improve seedproduction because of the heterosis existedim their sib-crosses, morever. theyield and main agronomic attributes of the modified hybrids with these sib-crosses are similiar to those of mormal hybrids; and (2) there are differentspecific combining abilities in the modified hybrids of the samesib-cross fromone inbred.
出处
《四川农业大学学报》
CSCD
1996年第4期541-546,共6页
Journal of Sichuan Agricultural University
关键词
玉米
姊妹系
姊妹种
改良单交
世代
单交
SIB-INBRED
SIB-CROSS
MODIFIED HYBRID
GENERATION
SINGLE CROSSES
