Comparative Study on the Chloroplast RPL32-TRNL Nucleotide Variation within and Genetic Differentiation among Ancient Tea Plantations of Camellia sinensis var.assamica and C.taliensis (Theaceae) from Yunnan,China |
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Authors: | LIU Yang- YANG Shi-Xiong- GAO Li-Zhi- |
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Affiliation: | 1.Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, ;Kunming 650204, China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China;;3.Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany,;Chinese Academy of Sciences, Kunming 650204, China |
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Abstract: | In order to assess genetic diversity and population structure, nine Camellia sinensis var.assamica and three C.taliensis populations from Yunnan, China were evaluated. Based on nucleotide variation of 94 cpDNA RPL32-TRNL sequences, a total of seven distinct haplotypes were detected in the studied populations. It was apparent that C.sinensis var.assamica (h=0.728,π =0.00469) possessed higher levels of genetic diversity than C.taliensis (h =0.610, π =0.00225). However, genetic differentiation among populations of C.sinensis varassamica (Gst=0.580, FST=0.612) was lower than that among C.taliensis populations (Gst=0.696, FST=0.773). Our AMOVA analysis further revealed that the majority of variation was partitioned among populations of the two taxa, while C.sinensis var.assamica (6121%) showed lower level of genetic differentiation than C.taliensis (77.34%). In comparisons to C.taliensis, genetic diversity within C.sinensis var.assamica largely varied among populations, ranging from 0 to 0.809 and from 0 to 0.00487 for haplotype and nucleotide diversity, respectively. Conservation strategies were finally discussed and proposed to efficiently protect ancient tea plantations in China. |
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Keywords: | Camellia sinensis var.assamica Camellia taliensis cpDNA Genetic diversity Ancient tea plantations RPL32-TRNL |
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