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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The lowest genetic distance was between Nueva Requena ANR and Curimana river ACR provenances which are both located along the Curimana river figure crinotasuggesting that downstream dispersal of seeds reduces the genetic distance.

Forest Ecology and Management Inter Simple Sequence Repeat ISSR markers combine some advantages of other markers such as reproducibility, low costs and no need to develop species-specific primers for analysis.

The DNA amplified using ISSR markers generated a total number of 65 fragments by the ten primers; the amplified fragments were within a range of to 2, bp. This is the first study of genetic diversity and structure of G. Geographic variation in tree growth and wood density of Guazuma crinita Mart.

Guazuma crinita

Geographic distance in kilometers above diagonal and Nei’s genetic distance below diagonal. Sterculiaceae family as one of the priority timber species for agroforestry systems So-telo-Montes and Weber The range of DNA amplification varied from to 2, bp.

Progress in the second decade Sample origin and plant material. There was a weak positive relationship between geographic guazumaa genetic distances of the provenances.


Guazuma crinita – Useful Tropical Plants

Do farmers reduce genetic diversity when they domesticate tropical trees? The species can potentially produce a dense stand of natural regeneration in open patches Rochon et al. Among the 30 universal UBC-ISSR primers University of British Columbia, Canada tested for their ability crinitta produce distinct, reproducible and well-resolved fragments in the 44 individual genotypes, 10 primers were selected for the amplification of all the samples table 2.

It seems that, there exists extensive gene flow, thus the provenances were not genetically isolated. Seeds can be dispersed over long distances by wind, and also downstream by water, hence we expected little differentiation among provenances. Only strong bands were used to construct a binary matrix.

Guazuma crinita Images – Useful Tropical Plants

Genetic distances among provenances ranged from 0. The sample included 44 genotypes from 11 provenances in the Aguaytia and neighboring Pachitea watersheds in the Peruvian Amazon. Overall genetic differentiation G jt was 0. Genetic variation in tree growth, stem form and mortality of Guazuma crinita in slower- and faster-growing plantations in the Peruvian Amazon.

This suggests that geographic distance had a small effect on genetic differentiation among provenances.

Genetic variation in growth of Guazuma crinita Mart. This study indicates that ISSR markers are effective and a relatively easy way to detect polymorphism and characterization of genetic variation.

Guazuma crinita Images

There was no clear grouping of genotypes based on the genotypes’ provenance of origin or proximity to other provenances. 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 Ten ISSR primers amplified a total of 65 bands of which 61 were polymorphic cronita 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.


Dendrogram of 44 Guazuma guzzuma genotypes based on Jaccard’s dissimilarity index. A total of 61 fragments were polymorphic Popula tion genetic structure of mahogany Swietenia macrophylla King, Meliaceae across the Brazilian Amazon, base on microsatellite at the loci: Genetic variability is essential to the success of strategies for tree improvement including selection, sustainable management and genetic resource conservation O’Neill et al.

Gene flow Nm was In Dawson I, R Jamnadass eds. Results from the provenance test indicated that the provenance from the local watershed Aguaytia performed better in terms of growth than did provenances from other watersheds in the Peruvian Amazon Basin Weber and Sotelo-Montes Although we were aware that our sample size was not extensive limitation caused by small number of individual trees in the clonal orchardother researchers crinota investigated genetic diversity in tree species using even smaller sample sizes e.

Peakall R, PE Smouse. The mating system of G.