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The distribution of the genetic variation within and among natural populations of A. ANGUSTIFOLIA growing in different regions in Brazil was assessed at microsatellite and AFLP markers. Both markers revealed high gene diversity ( H = 0.65; AR = 9.1 for microsatellites and H = 0.27; P = 77.8 % for AFLPs), moderate overall differentiation ( RST = 0.13 for(More)
The morphological features of pollen and seed of Araucaria angustifolia have led to the proposal of limited gene dispersal for this species. We used nuclear microsatellite and AFLP markers to assess patterns of genetic variation in six natural populations at the intra- and inter-population level, and related our findings to gene dispersal in this species.(More)
BACKGROUND AND AIMS The thin cell layer (TCL) technique is based on the use of very small explants and has allowed enhanced in vitro morphogenesis in several plant species. The present study evaluated the TCL technique as a procedure for somatic embryo production and plantlet regeneration of peach palm. METHODS TCL explants from different positions in the(More)
Up to date, little is known about the relationship between historical demography and the current genetic structure of A. angustifolia. As a first effort towards overcoming this lack, microsatellite data scored in six populations and isozyme allele frequencies published for 11 natural stands of this species were analysed in order to assess molecular(More)
Given their distribution, importance, and richness, Myrtaceae species comprise a model system for studying the evolution of tropical plant diversity. In addition, chloroplast (cp) genome sequencing is an efficient tool for phylogenetic relationship studies. Feijoa [Acca sellowiana (O. Berg) Burret; CN: pineapple-guava] is a Myrtaceae species that occurs(More)
One of the most important aspects for population ecology and evolution is to understand the connectivity between individuals and their groups. In this study, amplified fragment length polymorphism (AFLP) markers were employed aiming to examine genetic diversity, spatial genetic structure, and internal gene flow of nine populations of Schinus molle across(More)
Biodiversity is one of the most fundamental properties of Nature. It underpins the stability of ecosystems, provides vast bioresources for economic use, and has important cultural significance for many people. The Pampa biome, located in the southernmost state of Brazil, Rio Grande do Sul, illustrates the direct and indirect interdependence of humans and(More)
The microbiota and the functional genes actively involved in the process of breakdown and utilization of pollen grains in beebread and bee guts are not yet understood. The aim of this work was to assess the diversity and community structure of bacteria and archaea in Africanized honeybee guts and beebread as well as to predict the genes involved in the(More)
The Antarctic continent is the most untouched region of the world but is also among the most vulnerable to global environmental change. Alterations to the Antarctic environment can have cascading effects many of which are unpredictable. Our objective was to investigate the contribution of Brazilian scientists to Antarctic research and to characterize the(More)
This study aimed to establish a cryopreservation protocol for embryogenic cultures of A. angustifolia, enabling the ex situ conservation of the species. Embryogenic cultures were established from immature seeds and treated with variations of the cryoprotectant solutions SuDG, SoD and PVS2 prior to immersion in liquid nitrogen. Cell viability was evaluated(More)