Research Article

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05/09/2014
Anthracnose; Banana; Colletotrichum gloeosporioides; Colletotrichum musae; ITS regions; β-tubulin

Anthracnose caused by Colletotrichum species is a common postharvest disease of banana fruit. We investigated and identified Colletotrichum species associated with anthracnose in several local banana cultivars based on morphological characteristics and sequencing of ITS regions and of the β-tubulin gene. Thirty-eight Colletotrichum isolates were encountered in ... more

M.A.Intan Sakinah; I.V. Suzianti; Z. Latiffah
02/10/2012
Colombia; Microsatellites; Molecular characterization; Rubus glaucus; SSRs; Thornless blackberry

The species Rubus glaucus, also known as the Andean or “Castilla” blackberry, is one of nine edible species of this genus that grow naturally in Central and South America. In Colombia, this species is the most important of all Rubus species for agricultural and commercial purposes. We used 20 SSRs developed for other Rubus species to characterize 44 Colombian ... more

M. Marulanda; A.M. López; M. Uribe
12/19/2012
AFLP; Colombia; Genetic diversity; Heliconia; Phylogenetic relationships

Researchers have classified the Heliconia genus as a group of highly variable and diverse plants. Species and cultivars are visually differentiated primarily on the basis of the color and size of inflorescence bracts. At taxonomic level, flower type (parabolic, sigmoid, or erect) and size are taken into account. The vast morphological diversity of heliconias at intra-specific, ... more

L. Isaza; M.L. Marulanda; A.M. López
02/22/2011
Allium cepa; Anthracnose; Molecular markers

Onion anthracnose, caused by Colletotrichum gloeosporioides, is one of the main diseases of onions in the State of Pernambuco. We examined the pathogenicity of 15 C. gloeosporioides strains and analyzed their genetic variability using RAPDs and internal transcribed spacers (ITS) of the rDNA region. Ten of the strains were obtained from substrates and hosts other than ... more

M.X.Vila Nova; L.R. Borges; A.C.B. de Sousa; B.T.R.V. Brasileiro; E.A.L.A. Lima; A.F. da Costa; N.T. de Oliveira
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Anthracnose; common bean; Genetic variability; RAPD markers

Glomerella cingulata f. sp phaseoli is the sexual phase of the fungus Colletotrichum lindemuthianum, the causal agent of common bean anthracnose. This fungus is of great concern, because it causes large economic losses in common bean crops. RAPD markers of five populations of G. cingulata f. sp phaseoli from two Brazilian states were analyzed ... more

E.A. Souza; O.A. Camargo; J.M.A. Pinto
02/08/2013
Anthracnose; Colletotrichum lindemuthianum; Nitrate reductase; Phaseolus vulgaris

Colletotrichum lindemuthianum is the causal agent of plant bean anthracnose, one of the most important diseases affecting the common bean. We investigated the structure and expression of the nit1 gene (nitrate reductase) of C. lindemuthianum. The nit1 gene open reading frame contains 2787 bp, interrupted by a single 69-bp intron. The predicted protein ... more

G.B. Nogueira; M.V. Queiroz; R.A. Ribeiro; E.F. Araújo
02/24/2012
AMOVA; Cultivar; Dactylis glomerata L.; Simple sequence repeats

Orchardgrass is a highly variable, perennial forage grass that is cultivated throughout temperate and subtropical regions of the world. Despite its economic importance, the genetic relationship and distance among and within cultivars are largely unknown but would be of great interest for breeding programs. We investigated the molecular variation and structure of cultivar populations, ... more

W.G. Xie; X.F. Lu; X.Q. Zhang; L.K. Huang; L. Cheng
02/28/2002
Changes in rearrangement frequencies; Chromosomal polymorphism; Colombia; Drosophila pseudoobscura; Selection in favor of homokaryotypes

Chromosome 3 rearrangements were studied in five Drosophila pseudoobscura populations from the high plateau of the Colombian Andes. As in previous studies, the Santa Cruz and Tree Line rearrangements were predominant in these populations, but for the first time other rearrangements such as the Olympic, Cuernavaca and a rearrangement similar to the endemic Mexican Amecameca ... more

D. Alvarez; M. Ruiz-Garcia; J. Guerrero; J.P. Jaramillo
06/30/2003
Colombia; Genetic structure; Isoenzymes; Population genetics; Psorophora columbiae; Psorophora toltecum

Two populations of the mosquito Psorophora columbiae from the central Andean area of Colombia and one population of Ps. toltecum from the Atlantic coast of Colombia were analyzed for 11 isoenzyme markers. Psorophora columbiae and Ps. toltecum are two of the main vectors of Venezuelan equine encephalitis. We found no conspicuous genetic differences between the two ... more

M. Ruiz-Garcia; D. Ramirez; F. Bello; D. Alvarez
02/15/2011
Anthracnose; common bean; nit mutants; RAPD analysis; Vegetative compatibility group

The causal agent of common bean anthracnose, Colletotrichum lindemuthianum, has considerable genetic and pathogenic variability, which makes the development of resistant cultivars difficult. We examined variability within and between Brazilian pathotypes of C. lindemuthianum through the identification of vegetative compatibility groups (VCGs) and by RAPD analysis. Two ... more

Q.L. Barcelos; E.A. Souza; K.J.Damasceno Silva

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