Guazuma crinita is a semideciduous tree with a narrow, elongate or pyramidal crown; it can grow 7 – 18 metres tall in Brazil, but can exceed 30 metres in Bolivia . PDF | Guazuma crinita (Mart.) is an important timber-tree species for agroforestry plantations in the Peruvian Amazon Basin. Trees are typically. Peruvian smallholder production and marketing of bolaina (Guazuma crinita), a fast-growing Amazonian timber species: Call for a.

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Ten ISSR primers amplified a total of 65 bands of which 61 were polymorphic The use of genetic markers based on DNA overcome these disadvantages and are able to measure the genetic diversity in plant species White et al.

Puerto Inca and PMA: In this study of 44 genotypes from 11 provenances of G. Genetic variation in Costa Rica populations of the tropical timber species Cedrela odorata L. Our study revealed There was a weak positive relationship between geographic and genetic distances of the provenances. A total of 61 fragments were polymorphic It provides wood products at an early age yearscan be coppiced for successive harvests and contributes significantly to farmers’ income Labarta and Weber It seems that, there exists extensive gene flow, thus the provenances were not genetically isolated.

Advances in Agroforestry 9 2: Since seeds are dispersed crinuta rivers downstream, we ghazuma expect higher genetic diversity below the confluence of major rivers, consequently targeting conservation in these areas may be an effective conservation strategy. Wood density also varied genetically among provenances Weber and Sotelo-Montes Peakall R, PE Smouse.

This is the first study of genetic diversity and structure of G. Our results confirm that even a small clonal garden that was used in our research –under the conditions that the collection be correctly done– could possess relatively high genetic diversity and thus could form a good base for further domestication of the species.


The species can potentially produce a dense stand of natural regeneration in open patches Rochon et al. The dendrogram showed that the genotypes were grouped into three distinct clusters. Topology of the dendrogram showed that clusters were not related to the geographic origins of the genotypes. tuazuma

BOLD Systems: Taxonomy Browser – Guazuma crinita {species}

The objectives of our research were i to assess genetic diversity of G. However, we recommend analyzing more samples per population with employment of other types of molecular markers in future studies of genetic diversity as a basis of genetic improvement to G.

These results probably reflect the high gene flow in the sample region or limitation of the ISSR markers to reveal the existing variation among provenances. Tree origins and conservation on farm: In addition to ex situ clonal gardens, in situ conservation of populations of G.

The sample included 44 genotypes from 11 provenances in the Aguaytia and neighboring Pachitea watersheds in the Peruvian Amazon. The dynamic of gene flow via rivers within and among watersheds in the Peruvian Amazon Basin Jansky and forest fragmentation due to shifting cultivation could contribute to the formation of subpopulations Dourojeanni The authors thank Joel Odicio for support with the molecular markers analyses.

This is similar to the case of C.

Map of collection areas of 11 provenances that were sampled in the study. Only strong bands were used to construct a binary matrix. However He of Guazima.

Revista Forestal Centroamericana Guazuma crinita is an important fast-growing timber tree species widely used in agroforestry systems in the Peruvian Amazon. The average numbers of loci and polymorphic loci generated per primer were 6. guszuma


Primers used in the ISSR analysis and summary of amplifications. Strategies for genetic conservation of trees in the Peruvian Amazon. Geographic variation in tree growth and wood density of Guazuma crinita Mart. Sample origin and plant material.

Center for International Forestry Research

We hypothesized that there is a high level of polymorphism within provenances, very little differentiation among provenances and a positive relationship between genetic distance and geographic distance among provenances. Genetic variability is essential to the success of strategies for tree improvement including selection, sustainable management and genetic resource conservation O’Neill et al.

Most diversity occurred within rather than among provenances. We recommend in situ conservation strategies for populations with high levels of genetic diversity. Popula tion genetic structure of mahogany Swietenia macrophylla King, Meliaceae across the Brazilian Amazon, base on microsatellite at the loci: Nevertheless, there was a weak positive correlation between genetic and geographic distance of the provenances.

The authors thank Manuel Soudre for providing access to the clonal garden and information about the genotypes of G.

They were identified and selected based on phenotypic measurements along ten years of evaluation. Dendrogram of 44 Guazuma crinita genotypes based on Jaccard’s dissimilarity index. See table 1 for provenance abbreviations. Gene flow Nm was estimated to be Applied Biochemistry and Biotechnology Genetic variation in growth of Guazuma crinita Mart.

Temporal and spatial genetic structure in Vitellaria paradoxa shea tree in an agroforestry system in southern Mali.