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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There was a weak positive relationship between geographic and genetic distances of the provenances. Progress in the second decade The high value for gene flow reflects both pollen dispersal and seed dispersal. Overall coefficient of genetic differentiation G st was 0. This study indicates that ISSR markers are effective and a relatively easy way to detect polymorphism and characterization of genetic variation.

Guazuma crinita Images – Useful Tropical Plants

In addition to ex situ clonal gardens, in situ conservation of populations of G. However, the crinitz distance was relatively low between most provenances in the Aguaytia watershed and Macuya, which is in the Pachitea watershed figure 1.

Among the 30 universal UBC-ISSR primers Guaauma of British Columbia, Canada tested for their ability to 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. This pioneer species can be inter-cultivated with food crops because it has a small crown with thin branches, and the older branches naturally self-prune in the lower crown.


They were identified and selected based crrinita phenotypic measurements along ten years of evaluation. The overall analyses of genetic variation at watershed and provenance level are shown in table 3. It seems that, there exists extensive gene flow, thus the provenances were not genetically isolated.

Population genetic software for teaching and research-an update. This is the first study of genetic diversity and structure of G. Tree domestication has evolved over the last two decades to become an important global program, and molecular techniques have been used to analyze genetic diversity in several agroforestry tree species Leakey et al.

Guazuma crinita – Useful Tropical Plants

A total of 61 fragments were polymorphic Topology of the dendrogram showed that clusters were not related to the geographic origins of the genotypes. Technical Manual N cfinita 9. 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.

For example, Russell et al. A rapid DNA isolation procedure for small quantities of fresh tissue. Forest Ecology and Management Tuazuma analysis of Nei’s genetic identities of the pair-wise comparison between provenances varied from 0. Map of collection areas of 11 provenances that were sampled in the study.

Our results guazumq 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 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 criniya A report of genetic differentia tion of Swietenia gyazuma King.

The sample included 44 genotypes from 11 provenances in the Aguaytia and neighboring Pachitea watersheds in the Peruvian Amazon.

The objectives of our research were i to assess genetic diversity of G.

Guazuma crinita Images

However, the cluster analysis did not reveal any clear geographical pattern among the genotypes from the different provenances. Applied Biochemistry and Biotechnology 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 Tournavista-road also had the lowest Nei’s gene diversity He and Shannon index I.

Agroforestry -the future of global land use.

ISSR fragments were scored as presence 1 or absence 0 of bands in the gel profile. It may reflect the exchange of genes by the influence of human activity along closer watersheds. The authors thank Joel Odicio for support with the molecular markers analyses. Tree origins and conservation on farm: The average numbers of loci and polymorphic loci generated per primer were guauma.