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- Title
Detection of QTL associated with rust resistance using IBD-based methodologies in exogamic Eucalyptus spp. populations.
- Authors
Rosado, Tatiana Barbosa; Tomaz, Rafael Simões; Junior, Marcio Fernandes Ribeiro; Rosado, Antônio Marcos; da Silva Guimarães, Lúcio Mauro; de Araújo, Elza Fernandes; Alfenas, Acelino Couto; Cruz, Cosme Damião
- Abstract
In Brazil the rust caused by Puccinia psidii Winter stands out as the most important disease of eucalyptus. The use of resistant genotypes is the main control method, which makes the detection of markers linked to rust resistance essential to the selection of resistant genotypes. In this study, an F1 progeny of 131 plants from interspecific crossings of Eucalyptus was used to identify markers linked to resistance genes for this pathogen. An integrated map was constructed for linkage group three based on microsatellite markers. For QTL mapping two methodologies based on alleles identical-by-descent (IBD) were used: single marker analysis of Haseman and Elston and the interval mapping procedure of Fulker and Cardon. Both methods showed significant association for the Embra 125 marker.The QTL that explained 42 % of the phenotypic variation was mapped to 0.02 cM of this marker by the Fulker and Cardon. Marker Embra 125 has potential use in assisted selection, thus increasing the efficiency of the selection of resistant genotypes.
- Subjects
BRAZIL; EUCALYPTUS diseases &; pests; PLANT populations; MICROSATELLITE repeats; EUCALYPTUS grandis; CROP yields
- Publication
Crop Breeding & Applied Biotechnology, 2010, Vol 10, Issue 4, p321
- ISSN
1518-7853
- Publication type
Article
- DOI
10.1590/s1984-70332010000400006