选取栽培性状优良、较有代表性的 4个条斑紫菜栽培品系 ,将其自由丝状体采用RAPD标记技术进行分子标记和遗传结构的初步研究 ,用 2 8个随机引物在 4个品系中共扩增出 2 1 5条DNA片段 ,其中 2 3个引物扩增出的DNA片段图谱在 4个品系中是特异性的 ,可以用于品系鉴定 .RAPD图谱的统计结果表明 ,这 4个栽培品系间存在较大的遗传差异 ,而且在单孢子形成能力上差异较大者 ,其遗传距离也较远 . Four cultivars of Porphyra yezoensis with good cultivars and cultivars were selected and their molecular markers and genetic structure were studied by RAPD markers. The random amplified polymorphic DNA Two hundred and fifteen DNA fragments were amplified, of which twenty-three primers amplified the DNA fragments in four lines, which were specific and could be used for line identification.The statistical results of RAPD showed that among the four lines There is a large genetic difference, but also in the formation of a single spore difference between the larger, the genetic distance is also far.