Artigo

Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest

The logging of large trees in tropical forests causes a decrease in the density of reproductive individuals, which likely affects the pattern of pollen dispersal and the mating system of the remaining trees in the population. Here, we investigate the impact of logging on mating system and genetic di...

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Autor principal: Arruda, Cinthya Cristina Bulhões
Outros Autores: Silva, Marivana Borges, Magno Sebbenn, Alexandre, Kanashiro, Milton, Lemes, Maristerra R., Gribel, Rogério
Grau: Artigo
Idioma: English
Publicado em: Tree Genetics and Genomes 2020
Assuntos:
Bagassa Guianensis
Moraceae
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/17498
id oai:repositorio:1-17498
recordtype dspace
spelling oai:repositorio:1-17498 Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest Arruda, Cinthya Cristina Bulhões Silva, Marivana Borges Magno Sebbenn, Alexandre Kanashiro, Milton Lemes, Maristerra R. Gribel, Rogério Bagassa Guianensis Moraceae The logging of large trees in tropical forests causes a decrease in the density of reproductive individuals, which likely affects the pattern of pollen dispersal and the mating system of the remaining trees in the population. Here, we investigate the impact of logging on mating system and genetic diversity of the low-density, thrip-pollinated, dioecious tree Bagassa guianensis within a 500-ha plot at Tapajós National Forest, Pará State, Brazil. Mating system parameters of the logged population were estimated using mixed-mating model. Six microsatellite loci were used to genotype 232 seeds from ten remnant female trees over three seasons (2006, 2007, and 2008). The data were compared with the mating system of the unlogged population of B. guianensis (18 female trees, 488 seeds) in the same plot. The overall number of alleles found in the open-pollinated progenies decreased after logging (K = 71 before logging and K = 57 after logging, considering the three after logging seasons pooled), as well as the average number of alleles per locus (A = 11.8 and 9.5, respectively). Similarly, the number of private alleles, which is defined in the context of this study as the number of alleles observed in the population exclusively before or after logging, also decreased after logging (15 and 1, respectively). However, the average number of alleles per locus and the observed and expected heterozygosities were not significantly higher before logging than after logging. Logging also did not affect the inbreeding of progenies in the population. Somewhat unexpectedly, the effective number of pollen donors was consistently higher after (N<inf>ep</inf> = 14.5 in 2006, 8.1 in 2007, and 6.3 in 2008) than before logging (N<inf>ep</inf> = 3.4), suggesting that the loss of alleles in the population was compensated by the higher heterogeneity in the pollen pool after the removal of the largest trees by logging. Potential causes explaining the patterns found here include the maintenance of large patches of forest around the logged plot and the species’ ability to perform long-distance pollination by airborne thrips. Maintenance of landscape integrity as logged and unlogged forests around the exploited areas is recommended to enhance pollen migration and to avoid long-term losses in genetic diversity. © 2015, Springer-Verlag Berlin Heidelberg. 2020-06-15T21:48:06Z 2020-06-15T21:48:06Z 2015 Artigo https://repositorio.inpa.gov.br/handle/1/17498 10.1007/s11295-015-0837-2 en Volume 11, Número 1 Restrito Tree Genetics and Genomes
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Bagassa Guianensis
Moraceae
spellingShingle Bagassa Guianensis
Moraceae
Arruda, Cinthya Cristina Bulhões
Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
topic_facet Bagassa Guianensis
Moraceae
description The logging of large trees in tropical forests causes a decrease in the density of reproductive individuals, which likely affects the pattern of pollen dispersal and the mating system of the remaining trees in the population. Here, we investigate the impact of logging on mating system and genetic diversity of the low-density, thrip-pollinated, dioecious tree Bagassa guianensis within a 500-ha plot at Tapajós National Forest, Pará State, Brazil. Mating system parameters of the logged population were estimated using mixed-mating model. Six microsatellite loci were used to genotype 232 seeds from ten remnant female trees over three seasons (2006, 2007, and 2008). The data were compared with the mating system of the unlogged population of B. guianensis (18 female trees, 488 seeds) in the same plot. The overall number of alleles found in the open-pollinated progenies decreased after logging (K = 71 before logging and K = 57 after logging, considering the three after logging seasons pooled), as well as the average number of alleles per locus (A = 11.8 and 9.5, respectively). Similarly, the number of private alleles, which is defined in the context of this study as the number of alleles observed in the population exclusively before or after logging, also decreased after logging (15 and 1, respectively). However, the average number of alleles per locus and the observed and expected heterozygosities were not significantly higher before logging than after logging. Logging also did not affect the inbreeding of progenies in the population. Somewhat unexpectedly, the effective number of pollen donors was consistently higher after (N<inf>ep</inf> = 14.5 in 2006, 8.1 in 2007, and 6.3 in 2008) than before logging (N<inf>ep</inf> = 3.4), suggesting that the loss of alleles in the population was compensated by the higher heterogeneity in the pollen pool after the removal of the largest trees by logging. Potential causes explaining the patterns found here include the maintenance of large patches of forest around the logged plot and the species’ ability to perform long-distance pollination by airborne thrips. Maintenance of landscape integrity as logged and unlogged forests around the exploited areas is recommended to enhance pollen migration and to avoid long-term losses in genetic diversity. © 2015, Springer-Verlag Berlin Heidelberg.
format Artigo
author Arruda, Cinthya Cristina Bulhões
author2 Silva, Marivana Borges
Magno Sebbenn, Alexandre
Kanashiro, Milton
Lemes, Maristerra R.
Gribel, Rogério
author2Str Silva, Marivana Borges
Magno Sebbenn, Alexandre
Kanashiro, Milton
Lemes, Maristerra R.
Gribel, Rogério
title Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
title_short Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
title_full Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
title_fullStr Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
title_full_unstemmed Mating system and genetic diversity of progenies before and after logging: a case study of Bagassa guianensis (Moraceae), a low-density dioecious tree of the Amazonian forest
title_sort mating system and genetic diversity of progenies before and after logging: a case study of bagassa guianensis (moraceae), a low-density dioecious tree of the amazonian forest
publisher Tree Genetics and Genomes
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/17498
_version_ 1787143356228304896
score 11.755432

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