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GENETIC DIVERSITY OF
ARGENTINA TOMATO VARIETIES REVEALED BY MORPHOLOGICAL TRAITS, SIMPLE
SEQUENCE REPEAT, AND SINGLE NUCLEOTIDE POLYMORPHISM MARKERS
XIAORONG HU1, HUI WANG2, JIA CHEN2 AND
WENCAI YANG2*
Abstract:
Twenty-six
morphological traits as well as 47 single nucleotide polymorphism and
simple sequence repeat markers were used to investigate genetic
variation in 67 tomato (Solanum lycopersicum L.) varieties
collected from Argentina between 1932 and 1974. Approximately 65.0% of
the morphological traits and 55.3% of the molecular markers showed
polymorphisms in the 67 varieties. Average taxonomic distance between
any two varieties ranged from 0.6643 to 1.1776, while Nei’s genetic
distance varied from 0 to 0.2022. Cluster analysis indicated that 67
varieties could be grouped into three clusters at both morphological and
molecular levels. The varieties collected before 1960 had larger
genetic variation than those collected after 1960.
1The National Key Facilities for Crop Genetic Resources and
Improvement / Institute of Crop Science, Chinese Academy of Agricultural
Sciences, Beijing 100081, China
2Department
of Vegetable Science, College of Agronomy and Biotechnology, China
Agricultural University, No. 2 Yuanmingyuan Xilu, Haidian District,
Beijing 100193, China
*Corresponding author: Tel: 86-10-62734136, Fax: 86-10-62733404, E-mail:
yangwencai@cau.edu.cn
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