Abstract：TRAP technique was used to analyze the genetic diversity and relationship of 47 purple lettuce
（Lactuca sativa L. ） species．20 pairs of TRAP primers amplified polymorphic bands were 430，and the
polymorphic rate was 67.08%．The genetic similarity coefficient was 0.706 3-0.982 8．The average Nei’s gene
diversity index and Shannon’s information index were 0.255 3 and 0.397 6，respectively，indicating that the low
degree of genetic diversity in purple lettuce．The cluster analysis divided these 47 species into 2 major groups，
and the Ⅱ group could be devided into 5 subgroups．The species with similar leaf morphology were clustered
together，they had closer genetic relationship．
王亚楠, 韩莹琰, 范双喜, 卜斌. 紫色叶用莴苣遗传多样性及亲缘关系的TRAP 分析[J]. 中国蔬菜, 2015, 1(3): 25-.
WANG Ya-Nan, HAN Ying-Yan, FAN Shuang-Xi, BU Bin. Analysis of Genetic Diversity and Relationship in Purple Lettuce by TRAP
Technique. , 2015, 1(3): 25-.
