Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil
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...
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Wiley
2012-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1100/2012/368286 |
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| author | Ester Wickert Antonio de Goes Andressa de Souza Eliana Gertrudes de Macedo Lemos |
| author_facet | Ester Wickert Antonio de Goes Andressa de Souza Eliana Gertrudes de Macedo Lemos |
| author_sort | Ester Wickert |
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| description | 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. |
| format | Article |
| id | doaj-art-49ba6329c8d84d829e17426a9c05444f |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-49ba6329c8d84d829e17426a9c05444f2025-02-03T01:22:51ZengWileyThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/368286368286Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in BrazilEster Wickert0Antonio de Goes1Andressa de Souza2Eliana Gertrudes de Macedo Lemos3Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (EPAGRI), Estação Experimental de Itajaí, Rodovia Antônio Heil 8400, Itaipava, 88318-112 Itajaí, SC, BrazilDepartamento de Fitossanidade, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Universidade Estadual Paulista Via de Acesso Professor Dr. Paulo Donato Castellane s/n, 14884900 Jaboticabal, SP, BrazilDepartamento de Fitossanidade, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Universidade Estadual Paulista Via de Acesso Professor Dr. Paulo Donato Castellane s/n, 14884900 Jaboticabal, SP, BrazilDepartamento de Tecnologia, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Universidade Estadual Paulista Via de Acesso Professor Dr. Paulo Donato Castellane s/n, 14884900 Jaboticabal, SP, BrazilOne 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.http://dx.doi.org/10.1100/2012/368286 |
| spellingShingle | Ester Wickert Antonio de Goes Andressa de Souza Eliana Gertrudes de Macedo Lemos Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil The Scientific World Journal |
| title | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil |
| title_full | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil |
| title_fullStr | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil |
| title_full_unstemmed | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil |
| title_short | Genetic Diversity and Population Differentiation of the Causal Agent of Citrus Black Spot in Brazil |
| title_sort | genetic diversity and population differentiation of the causal agent of citrus black spot in brazil |
| url | http://dx.doi.org/10.1100/2012/368286 |
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