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<p><italic>Eucalyptus urophylla</italic> S.T. Blake is a species of great commercial importance, especially in tropical regions, and it is the main eucalypts species cultivated in Brazil. This study evaluated the genetic diversity among and within seven populations of <italic>E. urophylla</italic> and estimated the genetic distance between individuals to draw inferences about the genetic structure between and within the sampled populations. For that, 19 microsatellite markers were genotyped in 254 individuals originating from four wild populations, introduced in Brazil, two breeding populations, and one population consisting of commercial clones. The wild populations of <italic>E. urophylla</italic> introduced in Brazil have high genetic similarity and the few generations of breeding have already generated significant differences in population structure between improved and wild populations. As expected, breeding populations are closer to commercial clones than wild populations. However, compared to wild populations, breeding populations exhibit greater genetic diversity as they originated from a mixture of provenances. The population formed by clones was the only one that showed a negative Wright fixation index, that is, heterozygosity was higher than expected for a population in Hardy-Weinberg equilibrium.</p>
</abstract>

Eucalyptus urophylla S.T. Blake is a species of great commercial importance, especially in tropical regions, and it is the main eucalypts species cultivated in Brazil. This study evaluated the genetic diversity among and within seven populations of E. urophylla and estimated the genetic distance between individuals to draw inferences about the genetic structure between and within the sampled populations. For that, 19 microsatellite markers were genotyped in 254 individuals originating from four wild populations, introduced in Brazil, two breeding populations, and one population consisting of commercial clones. The wild populations of E. urophylla introduced in Brazil have high genetic similarity and the few generations of breeding have already generated significant differences in population structure between improved and wild populations. As expected, breeding populations are closer to commercial clones than wild populations. However, compared to wild populations, breeding populations exhibit greater genetic diversity as they originated from a mixture of provenances. The population formed by clones was the only one that showed a negative Wright fixation index, that is, heterozygosity was higher than expected for a population in Hardy-Weinberg equilibrium.

Genetic structure and diversity in wild and breeding populations of <italic>Eucalyptus urophylla</italic>

Escola Superior de Agricultura “Luiz de Queiroz” – Universidade de São Paulo Av. Pádua Dias

Silvae Genetica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Genetic structure and diversity in wild and breeding populations of 

Eucalyptus urophylla S.T. Blake is a species of great commercial importance, especially in tropical regions, and it is the main eucalypts species cultivated in...

Genetic structure and diversity in wild and breeding populations of Eucalyptus urophylla

Publié en ligne: 13 févr. 2023

Pages: 128 - 136

DOI: https://doi.org/10.2478/sg-2022-0015

Mots clés
Population genetics, Genetic diversity, Clone, Micros-satelite

© 2022 Isabela Pires Barros et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Genetic structure and diversity in wild and breeding populations of Eucalyptus urophylla

Publié en ligne: 13 févr. 2023

Pages: 128 - 136

DOI: https://doi.org/10.2478/sg-2022-0015

Mots clésPopulation genetics, Genetic diversity, Clone, Micros-satelite

© 2022 Isabela Pires Barros et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Population genetics, Genetic diversity, Clone, Micros-satelite