Data/hora: 18/06/2024 10:30:43

Biblioteca(s): | Epagri-Sede.
Data corrente: | 27/07/2012
Data da última atualização: | 27/07/2012
Autoria: | WICKERT, E.; SOUZA, A.; GOES, A.; LEMOS, E. G. M.
Afiliação: | Epagri
Título: | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil.
Ano de publicação: | 2012
Fonte/Imprenta: | The Scientific World Journal, New York, USA, v. 2012, p. 1-14, 2012.
Idioma: | Inglês
Notas: | ISSN, 1537-744X

Conteúdo:

One of the most important diseases that affect sweet orange orchards in Brazil is the Citrus Black Spot that is caused by the fungus Guignardia citricarpa. This disease causes irreparable losses due to the premature falling of fruit, as well as its severe effects on the epidermis of ripe fruit that renders them unacceptable at the fresh fruit markets. Despite the fact that the fungus and the disease are well studied, little is known about the genetic diversity and the structure of the fungi populations in Brazilian orchards. The objective
of this work was study the genetic diversity and population differentiation of G. citricarpa associated with four sweet orange varieties in two geographic locations using DNA sequence of ITS1-5.8S-ITS2 region from fungi isolates.We observed that different
populations are closely related and present little genetic structure according to varieties and geographic places with the highest genetic diversity distributed among isolates of the same populations. The same haplotypes were sampled in different populations from the same and different orange varieties and from similar and different origins. If new and pathogenic fungi would become resistant to fungicides, the observed genetic structure could rapidly spread this new form from one population to others.

Palavras-Chave: | Guignardia citricarpa.
Categoria do assunto: | --
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_20837.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
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