128 documents found, page 1 of 13

Genetic diversity and differentiation of Brazilian bitter and sweet manioc vari...

Influência da vassoura de bruxa na fenologia do Cupuaçuzeiro

O cultivo do cupuaçuzeiro [Theobroma grandiflorum (Willd. ex Spreng.) Schum.] está em franca expansão na Amazônia brasileira. O principal fator limitante é a vassoura de bruxa, doença causada pela Crinipellis perniciosa (Stahel) Singer, cujo único controle econômico conhecido é a poda fitossanitária. A fenologia de dez cupuaçuzeiros em monocultivo, em solo Latossolo Amarelo distrófico adubado na região de Manau...

Historical Human Footprint on Modern Tree Species Composition in the Purus-Made...

Background: Native Amazonian populations managed forest resources in numerous ways, often creating oligarchic forests dominated by useful trees. The scale and spatial distribution of forest modification beyond pre-Columbian settlements is still unknown, although recent studies propose that human impact away from rivers was minimal. We tested the hypothesis that past human management of the useful tree community...

Physico-chemical analysis of the oleoresin and genetic variability of copaiba i...

The objective of this work was to characterize the oleoresin of copaiba (Copaifera reticulata) and to estimate genetic variability of the species in the Tapajós National Forest, PA, Brazil, using microsatellite markers. Sampling was performed in two areas, 5 km apart, in 136 trees. Genetic diversity was evaluated with six microsatellite markers derived from C. langsdorffii, and the oleoresin obtained from 30 tr...

Pupunha brava (Bactris dahlgreniana Glassman): progenitora da pupunha (Bactris ...

Recursos genéticos de espécies frutíferas nativas da Amazônia Brasileira

Este artigo reúne parte dos estudos com recursos genéticos das espécies frutíferas indígenas da Amazônia. Apresentam-se listas de prioridades históricas e atuais de cada instituição que se dedica à pesquisa com estas espécies, as listas das coleções e os bancos de germoplasma de cada instituição e suas possibilidades imediatas para expandir estas pesquisas. Apresentam-se algumas informações sobre diversas espéc...

Frutas da Amazônia.

Aspectos taxonomicos relativos al pejibaye (Bactris gasipaes H.B.K.).

Peach palm core collection in Brazilian Amazonia

The Peach palm Active Germplasm Bank has abundant genetic diversity in its holdings. Because it is a live collection, maintenance, characterization and evaluation are expensive, restricting its use. One way to promote more efficient use is to create a Core Collection, a set of accessions with at least 70% of the genetic diversity of the full collection with minimal repetition. The available geographic, molecula...

Legacies of intensive management in forests around pre-columbian and modern set...

Amazonian peoples use and manage plant populations in previously domesticated landscapes, but the extent of landscape transformation remains uncertain, especially in interfluvial areas. We tested the hypothesis that useful plant communities vary in richness, abundance and basal area around pre-Columbian and current settlements independent of the distance to a major river. Nine plots were established at differen...