卡瓦胡椒及胡椒的AFLP分子标记探讨

Discussion on AFLP Molecular Markers in Piper methysticum and Pepper

为了探讨卡瓦胡椒与胡椒及胡椒属其他野生种的亲缘关系。以6份卡瓦胡椒2、1份栽培胡椒和野生胡椒、1份不同属的草胡椒28份种质为试材,提取叶片DNA,从64对引物中筛选出带型好、多态性和分辨率高的引物进行AFLP扩增,并运用MVSP3.13f软件进行聚类分析。筛选出的4对引物共扩增出191个条带,其中189个具有多态性,占98.6%。AFLP分子标记结果表明,在相似系数0.52处将28份种质分为6个类型,6份卡瓦胡椒聚成一类,说明卡瓦胡椒为胡椒科胡椒属,但与胡椒及其近缘野生种间亲缘关系有一定的距离。该研究为选择卡瓦胡椒嫁接用砧木、卡瓦胡椒的分子鉴定和构建卡瓦胡椒指纹图谱提供了依据。

The aim of the research was to discuss the genetic relationships between Piper methysticum, Pepper and other wild species in Pepper genus. With 28 germplasms including 6 materials of P. methysticum ,21 materials of cultivated and wild Pepper, 1 material of Peperomia pellucida belonged to different genus as tested matefials, DNA was extracted from leaves and premiers with good band-type and high polymorphism and resolution were screened from 64 pairs of primers for AFLP amplification and the clustering analysis was conducted with MVSP3.13f software. 191 bands were amplified by 4 pairs of premiers, 189 of which had polymorphism, being 98.6%. 28 germplasms were clustered into 6 different groups at the genetic similarity coefficient of 0.52 by silver staining AFLP, in which 6 materials of Piper methysticum were clustered into a single group, indicating that P. methysticum belonged to Pepper family of Pepper genus and were distantly related to the others. The research provided the basis for selecting rootstocks for P. methysticum graft, molecular identification of P. methysticum and the fingerprint construction of P. methysticum.