Genetic diversity and relationship of clonal tea (<Emphasis Type="Italic">Camellia sinensis</Emphasis>) cultivars in China as revealed by SSR markers |
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Authors: | W?Fang Email author" target="_blank">H?ChengEmail author Y?Duan X?Jiang Email author" target="_blank">X?LiEmail author |
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Institution: | (1) Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China;(2) Research Center for Tea Germplasm and Improvement, Tea Research Institute, Chinese Academy of Agriculture Science, Hangzhou, 310008, China; |
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Abstract: | Tea plant Camellia
sinensis (L.) O.Kuntze)] is one of the most popular non-alcoholic beverage crops in the world today. In recent years, many clonal
tea cultivars have been developed and widely planted to replace the diverse traditional tea populations. In this article,
we study the relationships between classifications based on simple sequence repeat (SSR) markers and on morphological traits
for 185 tea plant cultivars. Results show that the genetic diversity index (H) is between 0.229 and 0.803, and the mean value is 0.543; the observed heterozygosity (H
o) ranges from 0.103 to 0.683, with an average of 0.340, while the genetic identity varies from 0.267 to 0.984. Based on tea-making
properties, the genetic diversity in the “black-green tea” group is much higher than in the “Oolong tea” group. Based on morphological
traits, cluster analysis classifies the 185 cultivars into three groups, “group I,” “group II” and “group III.” Most cultivars
are related based on the geographical origin and their genetic backgrounds. |
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Keywords: | |
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