Estrutura genética em populações naturais de Tibouchina papyrus (pau-papel) em áreas de campo rupestre no cerrado

Telles, Mariana Pires de Campos; Silva, Sandra Oereira da; Ramos, Juliana Rosa; Soares, Thannya Nascimento; Melo, Dayane; Resende, Lucileide Vilela; Batista, Eliane; Vasconcellos, Breno de Faria e

doi:10.1590/s0100-84042010000200010

Cited by 7 publications

(6 citation statements)

References 11 publications

(15 reference statements)

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“…The distribution pattern was similar to that formed by UPGMA clustering, with the formation of three groups. Despite the relatively low density of the correlation between two matrices, compared to other species such as Cagaiteira (Eugenia dysenterica) (TELLES et al, 2001) which showed r = 0.72 and Pau-papel (Tibouchina papyrus) (TELLES et al, 2010) with r = 0.71, the correlation between the six populations of H. speciosa var. speciosa has indicated that the genetic and geographic distances are related.…”

Section: Resultsmentioning

confidence: 85%

Diversity and genetic structure in natural populations of Hancornia speciosa var. speciosa Gomes in northeastern Brazil

Martins¹,

Martins

Veasey

et al. 2012

Rev. Bras. Frutic.

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-Hancornia speciosa Gomes is a fruit tree native from Brazil that belongs to Apocinaceae family, and is popularly known as Mangabeira. Its fruits are widely consumed raw or processed as fruit jam, juices and ice creams, which have made it a target of intense exploitation. The extractive activities and intense human activity on the environment of natural occurrence of H. speciosa has caused genetic erosion in the species and little is known about the ecology or genetic structure of natural populations. The objective of this research was the evaluation of the genetic diversity and genetic structure of H. speciosa var. speciosa. The genetic variability was assessed using 11 allozyme loci with a sample of 164 individuals distributed in six natural populations located in the States of Pernambuco and Alagoas, Northeastern Brazil. The results showed a high level of genetic diversity within the species (H e = 0.36) seeing that the most of the genetic variability of H. speciosa var. speciosa is within its natural populations with low difference among populations ( q p = 0.081). The inbreeding values within ( f = -0.555) and among populations ( F =-0.428) were low showing lacking of endogamy and a surplus of heterozygotes. The estimated gene flow ( N m ) was high, ranging from 2.20 to 13.18, indicating to be enough to prevent the effects of genetic drift and genetic differentiation among populations. The multivariate analyses indicated that there is a relationship between genetic and geographical distances, which was confirmed by a spatial pattern analysis using Mantel test (r = 0.3598; p = 0.0920) with 1000 random permutations. The high genetic diversity index in these populations indicates potential for in situ genetic conservation. Index terms: Conservation, gene flow, genetic resources, genetic variability, isozyme, mangabeira. DIVERSIDADE E ESTRUTURA GENÉTICA EM POPULAÇÕES NATURAIS DE Hancornia speciosa var. speciosa GOMES NO NORDESTE DO BRASILRESUMO -Hancornia speciosa Gomes é uma árvore frutífera nativa do Brasil, pertencente à família Apocinaceae, e é conhecida popularmente como Mangabeira. Seus frutos são amplamente consumidos in natura ou processados como sucos, sorvetes e geleias. O extrativismo e a intensa atividade antrópica no ambiente de ocorrência natural da Mangabeira, no Nordeste do Brasil, têm causado erosão genética na espécie e pouco se conhece sobre a estrutura genética das populações desta espécie. O objetivo deste trabalho foi avaliar a diversidade e a estrutura genética de populações naturais de H. speciosa var. speciosa. Utilizando 11 locos isoenzimáticos, avaliaram-se 164 indivíduos, amostrados em seis populações naturais localizadas nos Estados de Pernambuco e Alagoas, Nordeste do Brasil. Os resultados mostraram um alto nível de diversidade genética dentro da espécie (H e = 0,36), sendo verificado que a maior parte da variabilidade genética se encontra dentro das populações, com pequena diferenciação entre as mesmas (q p = 0,081). A endogamia dentro das populações ( f = -0,555) e entre...

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Section: Resultsmentioning

confidence: 85%

Diversity and genetic structure in natural populations of Hancornia speciosa var. speciosa Gomes in northeastern Brazil

Martins¹,

Martins

Veasey

et al. 2012

Rev. Bras. Frutic.

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“…In the last decade, several studies have evaluated the genetic structure in Cerrado plant species (Zucchi et al, 2003;Soares et al, 2008;Moreno et al, 2009;Collevatti et al, 2001Collevatti et al, , 2010Telles et al, 2003Telles et al, , 2010Tarazi et al, 2010;Martins et al, 2006Martins et al, , 2011Moura et al, 2009Moura et al, , 2011Moraes and Sebbenn, 2011). Most of them addressed the genetic diversity and population differentiation, aiming to determine the conservation status of natural populations, which would then make it possible to infer historical events related to anthropogenic disturbance, gene flow between populations and the effect of ecosystem fragmentation.…”

Section: Introductionmentioning

confidence: 99%

Genetic structure in fragmented populations of Solanum lycocarpum A. St.-Hil. with distinct anthropogenic histories in a Cerrado region of Brazil

Moura¹,

Martins²,

Sujii³

et al. 2012

Genet. Mol. Res.

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ABSTRACT. Solanum lycocarpum is a woody tree widely distributed in the Cerrado that reaches high population densities in disturbed environments. We examined the genetic diversity and population differentiation of six S. lycocarpum populations with different degrees of human disturbance in order to determine if they are negatively affected by anthropogenic activity. Three populations located in southern and three located in southeastern regions of Goiás State, Central Brazil, were genotyped with five microsatellite markers. The population located in a protected area had higher number of alleles (26) 2674-2682 (2012) Negative effect of the ecosystem fragmentation 2675 alleles). It indicates that extensive and continuous areas of preserved native vegetation contribute positively to the conservation of genetic diversity, even with S. lycocarpum that easily adapts to disturbed environments. The three southeastern populations, although fragmented, had preserved native vegetation and were not significantly different from each other (θp = 0.002).All other population pairs compared were significantly divergent (θp varied from 0.03 to 0.11 between pairs, P < 0.05). We found three distinct sets of allele frequencies. The three southeastern populations shared similar gene pools, as well as the two disturbed southern populations, which are secondary vegetation. The southern population located in protected area had the most dissimilar gene pool. In conclusion, populations showing a higher degree of human disturbance tends to show a larger population differentiation than expected from the isolation by distance model, which in the current scenario of the Cerrado destruction points out to a threat to the long-term conservation of the species.

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“…Several studies evaluated the genetic structure of native plant populations in the Cerrado (Collevatti et al, 2010;Telles et al, 2010;Tarazi et al, 2010;Martins et al, 2011;Moura et al, 2011). These studies aimed at determining the distribution of diversity in populations of conservation units and inferring on historical events related to the effects of human activities on ecosystems fragmentation.…”

Section: Introductionmentioning

confidence: 99%

Chloroplast diversity of Casearia grandiflora in the Cerrado of Piauí State

et al. 2017

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Estrutura genética em populações naturais de Tibouchina papyrus (pau-papel) em áreas de campo rupestre no cerrado

Cited by 7 publications

References 11 publications

Diversity and genetic structure in natural populations of Hancornia speciosa var. speciosa Gomes in northeastern Brazil

Diversity and genetic structure in natural populations of Hancornia speciosa var. speciosa Gomes in northeastern Brazil

Genetic structure in fragmented populations of Solanum lycocarpum A. St.-Hil. with distinct anthropogenic histories in a Cerrado region of Brazil

Chloroplast diversity of Casearia grandiflora in the Cerrado of Piauí State

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