Genetic structure of Copaifera Langsdorffii Desf. Natural populations
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Universidade Federal de Lavras
2004
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| _version_ | 1876448757089828864 |
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| author | Alessandro Fabiano de Oliveira |
| author_facet | Alessandro Fabiano de Oliveira |
| contents | Genetic structure of Copaifera Langsdorffii Desf. Natural populations Alessandro Fabiano de Oliveira Dulcinéia de Carvalho Agrociencias Isoenzyme Copaíba oil Genetic conservation Three natural populations of Copaifera langsdorffii Desf. were studied byisoenzyme electrophoresis to determine the genetic structure, levels of genetic variability, geneflow and effective size of the populations. The populations are located in the county of Lavras,in Southern Minas Gerais state and are represented by three types of vegetation (Savanna,Riparian forest and Semi-deciduous forest). Samples of leaf tissue were taken from 20 adultplants from each population and from 400 progenies for isoenzyme electrophoresis analysis.Five enzymatic systems were evaluated in adults (24 alleles average) and progenies (29 allelestotal). The proportion of polymorphic loci (0,95) among populations was 72.73% to 87.50%.The average number of alleles per locus was 2.2 to 2.5 and the expected heterozygosity ( e H )was 0.368 to 0.435. The estimated parameters revealed inbreeding in the adult populations( F = 0.130) and excess of heterozygotes in the progenies (F =-0.033). The genetic diversityindex of the populations was 0.142 for the Savanna-Riparian forest, 0.162 for the RiparianSemi-deciduous forest, and 0.073 for the Savanna-Semi-deciduous forest. The gene flow,estimated by the number of migrants ( m N ), was 0.79 for Savanna-Semi-deciduous forest, 0.38for Savanna-Riparian forest, 0.32 for Riparian-Semi-deciduous forest and 0.41 for all analyzedpopulations. The population from the Riparian forest has a relatively high genetic variabilityand is valuable for genetic conservation of C. langsdorffii. 2004 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74410201 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.2 Vol.10 |
| format | Artículo científico |
| id | redalyc_74410201 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidade Federal de Lavras |
| spellingShingle | Genetic structure of Copaifera Langsdorffii Desf. Natural populations Alessandro Fabiano de Oliveira Agrociencias Isoenzyme Copaíba oil Genetic conservation Genetic structure of Copaifera Langsdorffii Desf. Natural populations Alessandro Fabiano de Oliveira Dulcinéia de Carvalho Agrociencias Isoenzyme Copaíba oil Genetic conservation Three natural populations of Copaifera langsdorffii Desf. were studied byisoenzyme electrophoresis to determine the genetic structure, levels of genetic variability, geneflow and effective size of the populations. The populations are located in the county of Lavras,in Southern Minas Gerais state and are represented by three types of vegetation (Savanna,Riparian forest and Semi-deciduous forest). Samples of leaf tissue were taken from 20 adultplants from each population and from 400 progenies for isoenzyme electrophoresis analysis.Five enzymatic systems were evaluated in adults (24 alleles average) and progenies (29 allelestotal). The proportion of polymorphic loci (0,95) among populations was 72.73% to 87.50%.The average number of alleles per locus was 2.2 to 2.5 and the expected heterozygosity ( e H )was 0.368 to 0.435. The estimated parameters revealed inbreeding in the adult populations( F = 0.130) and excess of heterozygotes in the progenies (F =-0.033). The genetic diversityindex of the populations was 0.142 for the Savanna-Riparian forest, 0.162 for the RiparianSemi-deciduous forest, and 0.073 for the Savanna-Semi-deciduous forest. The gene flow,estimated by the number of migrants ( m N ), was 0.79 for Savanna-Semi-deciduous forest, 0.38for Savanna-Riparian forest, 0.32 for Riparian-Semi-deciduous forest and 0.41 for all analyzedpopulations. The population from the Riparian forest has a relatively high genetic variabilityand is valuable for genetic conservation of C. langsdorffii. 2004 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74410201 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.2 Vol.10 |
| title | Genetic structure of Copaifera Langsdorffii Desf. Natural populations |
| topic | Agrociencias Isoenzyme Copaíba oil Genetic conservation |
| url | https://www.redalyc.org/articulo.oa?id=74410201 |