Abstract: The heterozygosity of 1209 molecular markers was surveyed between Minghui 63 and Zhenshan 97A for RAPD analysis using 57 primers and AFLP analysis using 15 primers. The results showed that, 57 RAPD primers amplified 394 bands with a mean of 6.9 bands per primer, resulting in 129 bands of polymorphisms heterozygosity of Shanyou 63 is 32.74 percent, 15 AFLP primers amplified 815 loci with a mean of 54.33 loci per primer, resulting in 289 loci of polymorphisms, the heterozygosity is 35.46 percent. Therefore 1209 markers indicated the heterozygosity of Shanyou 63 is 34.57 percents.

Key words: hybrid rice, random amplified polymorphic DNA, amplified fragment length polymorphism, heterozygosity

摘要： 利用57个RAPD引物和15个AFLP引物分析了明恢63与珍汕97A之间1209个位点的杂合性。结果表明，57个RAPD引物能扩增出394条带，平均每个引物扩增6.9条，多态性带129条，汕优63的杂合性为32.74%；15个AFLP引物共扩增出815个位点，平均每个引物扩增54.33条，多态性带289条，汕优63的杂合性为35.46%。1209个位点显示汕优63的杂合性为34.57%。

关键词: 杂交水稻, 随机扩增多态性DNA, 扩增片段长度多态性, 杂合性