Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/18667
Tipo do documento: Artigo
Título: Factorial analysis of bootstrap variances of population genetic parameter estimates
Autor: Garcia, Luciana Aparecida Carlini
Vencovsky, Roland
Coelho, Alexandre Siqueira Guedes
Abstract: We presented an alternative way to verify the relative contribution to the total variance, of the sources of variation due to populations (P), individuals within populations (I), the (P*I) interaction, and the standard error of the following parameter estimates: total (F) and intrapopulation (f) fixation indices, and divergence among populations ( ). The knowledge of this relative contribution is important to establish sampling strategies of natural populations. To attain these objectives, the bootstrap method was used to resample simultaneously populations and individuals, considering different combinations of P and I. This procedure was repeated five times for a given combination of each analyzed data set. For each data set, five estimates of these variances were obtained for each combination of P and I, and a given parameter estimate. These variance estimates were submitted to an analysis of variance, considering a factorial structure. The sources of variation considered in this analysis were P, I and P*I. The coefficient of determination (R2) was calculated for each source of variation. Sources of variation with greater R2 are responsible for bigger errors of the estimates. The method applied was efficient for answering the questions initially proposed, and the results indicated that there are no ideal sample sizes for a species, but rather for a specific data set, because each data set has its own particularities. However, for investigations on the genetic structure of natural populations using population parameters, the number of populations to be sampled is a critical factor. Thus, more efforts should be made to increase the number of sampled populations, rather than the number of individuals within populations. A sampling strategy is given as a guide for investigations of this kind, when there is no previous knowledge about the genetic structure and the mating system of the populations.
Palavras-chave: Population structure
Resampling
Natural populations
País: Brasil
Unidade acadêmica: Escola de Agronomia - EA (RG)
Citação: GARCIA, Luciana Aparecida Carlini; VENCOVSKY, Roland; COELHO, Alexandre Siqueira Guedes. Factorial analysis of bootstrap variances of population genetic parameter estimates. Genetics and Molecular Biology, Ribeirão Preto, v. 29, n. 2, p. 308-313, 2006.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1590/S1415-47572006000200019
Identificador do documento: 10.1590/S1415-47572006000200019
URI: http://repositorio.bc.ufg.br/handle/ri/18667
Data de publicação: 2007
Aparece nas coleções:EA - Artigos publicados em periódicos

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