| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Genetic variation in cultivated Rheum tanguticum populations
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| Autores: |
Hu,Yanping
Xie,Xiaolong
Wang,Li
Zhang,Huaigang
Yang,Jian
Li,Yi
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| Data: |
2014-09-01
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| Ano: |
2014
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| Palavras-chave: |
Cultivated populations
Genetic variation
ISSR
Polygonaceae
Rheum tanguticum Maxim. ex Balf
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| Resumo: |
To examine whether cultivation reduced genetic variation in the important Chinese medicinal plant Rheum tanguticum, the levels and distribution of genetic variation were investigated using ISSR markers. Fifty-eight R. tanguticum individuals from five cultivated populations were studied. Thirteen primers were used and a total of 320 DNA bands were scored. High levels of genetic diversity were detected in cultivated R. tanguticum (PPB = 82.19, H = 0.2498, H B = 0.3231, I = 0.3812) and could be explained by the outcrossing system, as well as long-lived and human-mediated seed exchanges. Analysis of molecular variance (AMOVA) showed that more genetic variation was found within populations (76.1%) than among them (23.9%). This was supported by the coefficient of gene differentiation (Gst = 0.2742) and Bayesian analysis (θB = 0.1963). The Mantel test revealed no significant correlation between genetic and geographic distances among populations (r = 0.1176, p = 0.3686). UPGMA showed that the five cultivated populations were separated into three clusters, which was in good accordance with the results provided by the Bayesian software STRUCTURE (K = 3). A short domestication history and no artificial selection may be an effective way of maintaining and conserving the gene pools of wild R. tanguticum.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000400010
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572014000400010
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.37 n.3 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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