December 30, 2019

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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Although we were aware that our sample size was not extensive limitation caused by small number of individual rcinita in the clonal orchardother researchers have investigated genetic diversity in tree species using even smaller sample sizes e. Genetic variability is essential to the success of strategies for tree improvement including selection, sustainable management and genetic resource conservation O’Neill et al.

Morphological characters and commercial wood traits have been used traditionally to characterize levels and patterns of diversity; however these traits alone represent only a small portion of the plant genome and are also influenced by environmental factors Muchugi et al. 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. The mating system of G.


The high value for gene flow reflects both pollen dispersal and seed dispersal. A case study from Amazonia. Technical Manual N o 9. For example, Russell et al. Overall genetic differentiation G jt was 0. Geographic distance gkazuma kilometers above diagonal and Nei’s genetic distance below diagonal. Nevertheless, there was a weak positive correlation between genetic and geographic distance of the provenances.

BOLD Systems: Taxonomy Browser – Guazuma crinita {species}

Consulted 15 May Documento de trabajo No. There was a weak positive relationship crinia geographic and genetic distances of the provenances. Cluster analysis was not related to geographic origin, suggesting a crinia gene pool. ISSRs are an efficient tool to analyze the variability and genetic structure in natural, managed and cultivated tree stands, and are useful to identify genotypes, even among highly related individuals Thangjam Tree origins and conservation on farm: Do farmers reduce genetic diversity when they domesticate tropical trees?

Guazuma crinita is an important fast-growing timber tree species widely used in agroforestry systems in the Peruvian Amazon. Topology of the dendrogram showed that clusters were not related to the geographic origins of the genotypes.

The species can potentially produce a dense stand of natural regeneration in open patches Rochon et al. Agroforestry -the future of global land use.

The objectives of this research are i to assess genetic diversity of G. This pioneer species can be inter-cultivated with food crops because it has a small crown with thin buazuma, and the older branches naturally self-prune in the lower crown. Results suggest that the provenances populations of G. Wood density also varied genetically among provenances Weber and Sotelo-Montes Tournavista-road also had the lowest Nei’s gene diversity He and Shannon index I.


In addition to ex situ clonal gardens, in situ conservation of populations of G. Genetic guazumz among provenances ranged from 0. Genetic variation in Costa Rica populations of the tropical timber species Cedrela odorata L.

Guazuma crinita

This suggests that geographic distance had a small effect on genetic differentiation among provenances. A rapid DNA isolation procedure for small quantities of fresh tissue. Overall coefficient of genetic differentiation G st was 0. Young leaf tissue samples of each genotype were individually collected and stored in micro-test tubes with silica gel for further DNA isolation.

The objectives of our research were i to assess genetic diversity of G. 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 criniita Weber A number of authors have examined both natural stands of tropical trees and cultivated samples e.