Document Detail

Genetic Variability and Host Specialization in the Latin American Clade of Ceratocystis fimbriata.
MedLine Citation:
PMID:  18944327     Owner:  NLM     Status:  In-Data-Review    
ABSTRACT The Ceratocystis fimbriata complex includes many undescribed species that cause wilt and canker diseases of many economically important plants. Phylogenetic analyses of DNA sequences have delineated three geographic clades within Ceratocystis fimbriata. This study examined host specialization in the Latin American clade, in which a number of lineages were identified using sequences of the internal transcribed spacer (ITS) region of the rDNA. Three host-associated lineages were identified from cacao (Theobroma cacao), sweet potato (Ipomoea batatas), and sycamore (Platanus spp.), respectively. Isolates from these three lineages showed strong host specialization in reciprocal inoculation experiments on these three hosts. Six cacao isolates from Ecuador, Trinidad, and Columbia differed genetically from other cacao isolates and were not pathogenic to cacao in inoculation tests. Further evidence of host specialization within the Latin American clade of Ceratocystis fimbriata was demonstrated in inoculation experiments in growth chambers using sweet potato, sycamore, Colocasia esculenta, coffee (Coffea arabica), and mango (Mangifera indica) plants; inoculation experiments in Brazil using Brazilian isolates from cacao, Eucalyptus spp., mango, and Gmelina arborea; and inoculation experiments in Costa Rica using Costa Rican isolates from cacao, coffee, and Xantho-soma sp. Hosts native to the Americas appeared to be colonized by only select pathogen genotypes, whereas nonnative hosts were colonized by several genotypes. We hypothesize that local populations of Ceratocystis fimbriata have specialized to different hosts; some of these populations are nascent species, and some host-specialized genotypes have been moved to new areas by humans.
Christine J Baker; Thomas C Harrington; Ulrike Krauss; Acelino C Alfenas
Related Documents :
9600237 - Interplay between humans and infective agents: a population genetic study.
11928707 - Comparative population structure and genetic diversity of arceuthobium americanum (visc...
17062127 - Allelic dimorphism of plasmodium vivax gam-1 in the indian subcontinent.
25456907 - Preliminary whole-exome sequencing reveals mutations that imply common tumorigenicity p...
24278027 - Fine-mapping the genetic association of the major histocompatibility complex in multipl...
14975127 - Similarity by state/descent and genetic vector spaces: analysis of a longitudinal famil...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Phytopathology     Volume:  93     ISSN:  0031-949X     ISO Abbreviation:  Phytopathology     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2008-10-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9427222     Medline TA:  Phytopathology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1274-84     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Correlations of Morphological, Anatomical, and Chemical Features of Grape Berries with Resistance to...
Next Document:  Strawberry Plant Extracts Stimulate Secondary Conidiation by Colletotrichum acutatum on Symptomless ...