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https://repositorio.inpa.gov.br/handle/1/16382
Título: | Monitoring genetic diversity in tropical trees with multilocus dominant markers |
Autor: | Kremer, Antoine Caron, Henri Cavers, Stephen Colpaert, Nathalie Gheysen, Godelieve D.R. Gribel, Rogério Lemes, Maristerra R. Lowe, Andrew J. Margis, Rogério Navarro, Carlos Manuel Salgueiro, Fabiano |
Palavras-chave: | Genetic Variation Genetics, Population Tree Tropical Environment Biological Model Dominant Gene Genetic Marker Genetic Variability Genetics Nucleic Acid Amplification Genetics, Population Polymorphism, Restriction Fragment Length Short Survey South America Tree Tropic Climate Genes, Dominant Genetic Markers Genetics, Population Models, Genetic Nucleic Acid Amplification Techniques Polymorphism, Restriction Fragment Length South America Trees Tropical Climate Variation (genetics) |
Data do documento: | 2005 |
Revista: | Heredity |
É parte de: | Volume 95, Número 4, Pags. 274-280 |
Abstract: | Since no universal codominant markers are currently available, dominant genetic markers, such as amplified fragment length polymorphism (AFLP), are valuable tools for assessing genetic diversity in tropical trees. However, the measurement of genetic diversity (H) with dominant markers depends on the frequency of null homozygotes (Q) and the fixation index (F) of populations. While Q can be estimated for AFLP loci, F is less accessible. Through a modelling approach, we show that the monolocus estimation of genetic diversity is strongly dependent on the value of F, but that the multilocus diversity estimate is surprisingly robust to variations in F. The robustness of the estimate is due to a mechanistic effect of compensation between negative and positive biases of H by different AFLP loci exhibiting contrasting frequency profiles of Q. The robustness was tested across contrasting theoretical frequency profiles of Q and verified for 10 neotropical species. Practical recommendations for the implementation of this analytical method are given for genetic surveys in tropical trees, where such markers are widely applied. © 2005 Nature Publishing Group All rights reserved. |
DOI: | 10.1038/sj.hdy.6800738 |
Aparece nas coleções: | Artigos |
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