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| Analysis of Genetic Diversity and Relationship in Purple Lettuce by TRAP
Technique |
| WANG Ya-nan，HAN Ying-yan，FAN Shuang-xi*，BU Bin |
| （Department of Plant Science and Technology，Beijing Agricultural College，Beijing 102206，China） |
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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．
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Received: 25 February 2014
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