Data/hora: 16/06/2024 00:40:05

Biblioteca(s): | Embrapa Florestas; Embrapa Recursos Genéticos e Biotecnologia.
Data corrente: | 30/09/2016
Data da última atualização: | 25/04/2024
Autoria: | ROSADO, C. C. G.; GUIMARÃES, L. M. da S.; FARIA, D. A.; RESENDE, M. D. V. de; CRUZ, C. D.; GRATTAPAGLIA, D.; ALFENAS, A. C.
Afiliação: | CARLA CRISTINA GONÇALVES ROSADO, UFV; LÚCIO MAURO DA SILVA GUIMARÃES, UFV; DANIELLE ASSIS FARIA; MARCOS DEON VILELA DE RESENDE, CNPF; COSME DAMIÃO CRUZ, UFV; DARIO GRATTAPAGLIA, CENARGEN; ACELINO COUTO ALFENAS, UFV.
Título: | QTL mapping for resistance to Ceratocystis wilt in Eucalyptus.
Ano de publicação: | 2016
Fonte/Imprenta: | Tree Genetics & Genomes, v. 12, n. 4, 10 p., 2016.
DOI: | 10.1007/s11295-016-1029-4
Idioma: | Inglês
Conteúdo: | Ceratocystis wilt caused by the fungus Ceratocystis fimbriata, is currently one of the major diseases in commercial plantations of Eucalyptus trees in Brazil. Deployment of resistant genotypes has been the main strategy for effective disease management. The present study aimed at identifying genomic regions underlying the genetic control of resistance to Ceratocystis wilt in Eucalyptus by quantitative trait loci (QTL) mapping in an outbred hybrid progeny derived from a cross between (Eucalyptus dunnii × Eucalyptus grandis) × (Eucalyptus urophylla × Eucalyptus globulus). A segregating population of 127 individuals was phenotyped for resistance to Ceratocystis wilt using controlled inoculation under a completely randomized design with five clonal replicates per individual plant. The phenotypic resistance response followed a continuous variation, enabling us to analyze the trait in a quantitative manner. The population was genotyped with 114 microsatellite markers and 110 were mapped with an average interval of 12.3 cM. Using a sib-pair interval-mapping approach five QTLs were identified for disease resistance, located on linkage groups 1, 3, 5, 8, and 10, and their estimated individual heritability ranged from 0.096 to 0.342. The QTL on linkage group 3 overlaps with other fungal disease-resistance QTLs mapped earlier and is consistent with the annotation of several disease-resistance genes on this chromosome in the E. grandis genome. This is the first study to identify and attempt to quantify the effects of QTLs associated with resistance to Ceratocystis wilt in Eucalyptus.
Palavras-Chave: | Genetic mapping; Sib-pair interval-mapping.
Thesagro: | Ceratocystis Fimbriata; Doença de planta; Fungo.
Thesaurus Nal: | Ceratocystis; Eucalyptus; Plant diseases and disorders; quantitative trait loci.

Categoria do assunto:

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G Melhoramento Genético

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/183297/1/Rosado2016-Article-QTLMappingForResistanceToCerat.pdf
Registro original: | Embrapa Recursos Genéticos e Biotecnologia (CENARGEN)

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