AMOSTRAGEM PARA ESTIMATIVA DE FREQÜÊNCIAS ALÉLICAS E ÍNDICES DE DIVERSIDADE GENÉTICA EM ESPÉCIES ARBÓREAS
DOI:
https://doi.org/10.24278/2178-5031.2002141398Keywords:
sampling, allele frequencies, indexes of genetic diversity, rare alleles, genetic conservation, genetic driftAbstract
The aim of this work was to determine the ideal sample size for the estimation of allele frequencies and genetic diversity indexes in forest species, when data of codominant genetic markers are appraised. For so much, it was detennined the sample size when objective to evaluate individuais in a simple population, individuais in several populations, populations of a species, families and progenies/fanulies in a simple population and families and progenies/families in severa! populations. The sample size was estimated based on variances of gene frequencies, incorporating information of the mating system of species, as self-fertilization rate. The ideal sample size to evaluate adults individuais in one or several populations was detemúned to be among 60 to 100 individuais. ln a population structured in families, when alogamus or mixed mating system, predominantly alogamus, species are used, the sampling of 30 families and 10 progenies/family are enough. To autogamus species, the sample size should be of 50 families and 11progemes/families. Finally, to evaluate many populations structured in families it is necessary to adopt the sample of 30 to 10 families/population and 10 progenies/family.
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