两系亚种间杂交水稻抽穗日数的杂种优势和配合力分析  

THE HETEROSIS AND COMBINING ABILITY FOR THE DAYS TO HEADING OF THE“TWO-LINE SYSTEM”INTERSUBSPECIFIC HYBRID RICE

作　　者：孙义伟[1] 李继庆[1] 刘宜柏 

机构地区：[1]江西农业大学作物育种研究室

出　　处：《江西农业大学学报》1993年第A01期74-78,共5页Acta Agriculturae Universitatis Jiangxiensis

摘　　要：用两用核不育水稻与广亲和品种配制的两系杂交稻组合,目前已成为利用籼粳亚种间杂种优势的一条重要途径。A partial diallel cross including 5 photosensitive genie male-sterile rice (PGMR) linesas female parents and 10 wide compatibility (WC) varieties as male parents was made tostudy the heterosis and combining ability for the days to heading (DTH) of the F_1hybrids.The result showed that 5460S and Hengnong -1S had better general combining ability(GCA),their F_1 showed no heterosis;W6154S,W6184S and K-9S had worse GCA,theirF_1 exhibited a significant positive heterobeltiosis,suggesting the difference in the DTH ofF_1 among parents and among combinations.The GCA of parents,especially the indicaparents,played a more important role in controlling the DTH of F_1s.The combining abilityof a parent is related to its breeding relationship and the parent derived from the southeastAsia variety has better GCA.The relation between GCA and the photosensitivity gene wasdiscussed.

关 键 词：抽穗日数 杂种优势 配合力 杂交稻 

分 类 号：S511.103.5[农业科学—作物学]