AFLP analysis was performed between a pair of thermo_sensitive genic male sterile (TGMS) rice allelic mutant lines (5460S and 5460F). The reaction conditions for rice AFLP assay were optimized. The relative efficiencies for polymorphism detection of RFLP, RAPD and AFLP were compared. The results indicated that the efficiency for polymorphism detection in rice was in the order of AFLP>RAPD>RFLP, and also indicated that AFLP was a powerful DNA molecular marker technique for polymorphism detection, especially in the case of extremely low polymorphism, such as isogenic lines and allelic mutant lines. Some of the AFLP products between the TGMS rice allelic mutant lines were cloned. Three of them were used as mixed probes to screen BAC library of rice line 5460S. 12 positive clones were screened out. In addition, the advantages and disadvantages of these three molecular marker systems were discussed.
本文用鸟枪法将恶性疟原虫基因组 DNA 片段克隆至载体 pBR_(322)质粒中,利用抗性遗传标志和琼脂糖凝胶电泳筛选重组克隆,克隆 pBF_8,pBF_(13),pBF_(23),pBF_(24)用 HindⅢ酶解后,均显示单一插入片段,分子大小分别为1.8,2.3,0.94和6.0kb。经 Southern Blot 和 Dot Blot 分析表明,克隆 pBF_(13)对恶性疟原虫基因组 DNA 特异,与人 DNA 无交叉性杂交,可用作诊断用探针。
