Selecting for rust (Puccinia psidii) resistance in Eucalyptus grandis in Sao Paulo State, Brazil

Autor(es)

Silva, Paulo H. M. ^{[1, 2]} ; Miranda, Aline C. ^{[3, 2]} ; Moraes, Mario L. T. ^{[3, 4]} ; Furtado, Edson L. ^[4] ; Stape, Jose Luiz ^[5] ; Alvares, Clayton Alcarde ^[2] ; Sentelhas, Paulo Cesar ^[6] ; Mori, Edson S. ^[4] ; Sebbenn, Alexandre M. ^[7]

Afiliação do(s) autor(es)

^[1] UNESP, FCAV, BR-14884900 Jaboticabal, SP - Brazil

^[2] IPEF, BR-13400970 Piracicaba, SP - Brazil

^[3] UNESP, FEIS, BR-1538500 Ilha Solteira, SP - Brazil

^[4] UNESP, FCA, BR-18603970 Botucatu, SP - Brazil

^[5] N Carolina State Univ, Dept Forestry & Environm Resources & Forest Prod, Raleigh, NC 27695 - USA

^[6] Univ Sao Paulo, ESALQ, BR-13400970 Piracicaba, SP - Brazil

^[7] Inst Florestal Sao Paulo, BR-01059970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOREST ECOLOGY AND MANAGEMENT; v. 303, p. 91-97, SEP 1 2013.
• Citações Web of Science: 26
• Assunto(s): Resistência à doença Parâmetros genéticos Agrometeorologia

Resumo

In Brazil, Eucalyptus grandis is a key species for wood production. However, some genotypes are susceptible to rust (Puccinia psidii), mainly in Sao Paulo State, where climatic conditions are favorable for its development. Rust represents a high economic risk to forest companies because of the high potential of damage to commercial eucalypt plantations. The aims of the present study were (i) to select progenies of E. grandis for stability and adaptability regarding resistance to rust at different locations; (ii) compare the selections under these different climatic conditions; and (iii) compare rust severity in the field with the theoretical model. We observed that climatic conditions were extremely influential factors for rust development, but even under favorable conditions for disease development, we found rust-resistant progenies. In sites unfavorable for rust development, we detected highly susceptible progenies. We found significant correlation among the genetic material, environmental conditions and disease symptoms, however, we observed a simple genotype-environmental interaction and significant genetic variability among the progenies. The average heritability was high among the progenies in all sites, indicating substantial genetic control for rust resistance. We also observed a good relationship between rust severity in the field and the theoretical model that considered annual average temperature and leaf wetness. (c) 2013 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/04337-1 - Produtividade, estabilidade e adaptabilidade em progênies de Eucalyptus grandis
• Beneficiário: Aline Cristina Miranda
• Modalidade de apoio: Bolsas no Brasil - Mestrado