Long distance pollen dispersal and intrapopulation genetic structure determined by clonal diversity in Hymenaea stigonocarpa populations of the Brazilian savanna

Moreno, Marlene Aparecida; Boshier, David; Tarazi, Roberto; Tambarussi, Evandro Vagner; Aguiar, Bruna Ibanes; Ferraz, Elza Martins; Kageyama, Paulo Yoshio; Sebbenn, Alexandre Magno

doi:10.1007/s00468-021-02222-8

Cited by 2 publications

(1 citation statement)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Copaifera langsdorffii populations from Central Brazil, also dispersed by birds, saplings recruited within a fragmented population were all assigned to mothers located within the same population (Sebbenn et al 2011), suggesting restricted seed dispersal, whereas gene dispersal among patches was attributed to far-ranging pollen dispersal (Manoel et al 2012(Manoel et al , 2021. Genetic studies in other Neotropical trees are in agreement with a pattern of narrow-ranging seed dispersal vs. far-ranging pollen dispersal, e.g., species with seed dispersal mediated by gravity and zoochory such as Bertholletia excelsa, Genipa americana, Hymenaea stigonocarpa, and Ilex paraguariensis (Baldoni et al 2020;de Vasconcelos Melo et al 2021;Moreno et al 2021;Seoane et al 2019), and others with seed dispersal mediated by anemochory such as Swietenia macrophylla (Silva de Oliveira et al 2020). Together, these studies suggest that SDTF species maintain connectivity between anthropogenically fragmented populations, and that in many cases, despite adaptations to long-distance dispersal via zoochory, it appears to be pollen dispersal that assures the genetic connectivity between fragments.…”

Section: Distances and Patterns Of Pollen And Seed Dispersalmentioning

confidence: 68%

Spatial genetic structure and mating system in forest tree populations from seasonally dry tropical forests: a review

Goncalves

García

Barrandeguy

et al. 2022

Tree Genetics & Genomes

View full text Add to dashboard Cite

Gene dispersal processes shape demographic and microevolutionary dynamics of tree species. Gene dispersal patterns can be studied by spatially explicit methods. Spatial genetic structure (SGS), summarized in the Sp statistic, provides indirect estimates of gene dispersal across generations for a known or assumed population effective density. Sp is modulated by exogenous and endogenous factors including the mating system that can be assessed using outcrossing rates (t m ). Knowledge on t m and Sp are particularly important for the conservation of species in fragmented biomes such as seasonally dry tropical forests (SDTF). The main aim of this review was to evaluate putative drivers of Sp and t m , and their consequences for gene dispersal in tree species from SDTF. We reviewed 59 genetic studies on SDTF tree species published between 2000 and 2020 and extracted data on propagule dispersal, successional stages, seasonality, mating system, population density, landscape features, type of molecular markers, pairwise kinship in the first distance class (F 1 ), Sp statistic, mean gene dispersal distance (σ g ), and multilocus outcrossing rates (t m ). Sp was significantly associated with the mating system where Sp(outcrossing) > Sp(mixed-mating), and population density where Sp was higher in high-density populations. Outcrossing rate was significantly associated with the type of propagule dispersal, where t m was higher in populations of plants pollinated by wind, and in those with animal-mediated seed dispersal, t m (zoochory) > t m (anemochory) > t m (autochory), and with successional stage where t m (late-successional) > t m (pioneer). These factors are relevant to inform management actions in conservation and restoration projects. Thus, the knowledge on the determinants of gene dispersal processes can help to rescue SDTF through sustainable management.

show abstract