Heritability for resistance to Puccinia psidii Winter rust in Eucalyptus grandis Hill ex Maiden in Southwestern Brazil

Autor(es)

Miranda, Aline Cristina ^{[1, 2]} ; Teixeira de Moraes, Mario Luiz ^{[1, 3]} ; Tambarussi, Evandro Vagner ^[4] ; Furtado, Edson Luis ^[2] ; Mori, Edson Seizo ^{[1, 2]} ; Muller da Silva, Paulo Henrique ^{[1, 4]} ; Sebbenn, Alexandre Magno ^{[5, 3]}

Afiliação do(s) autor(es)

^[1] IPEF, BR-13400970 Piracicaba, SP - Brazil

^[2] UNESP Botucatu, Fac Ciencias Agron Botucatu, BR-18603970 Botucatu, SP - Brazil

^[3] UNESP Ilha Solteira, Fac Engn Ilha Solteira, BR-15385000 Ilha Solteira, SP - Brazil

^[4] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz ESALQ, BR-13400970 Piracicaba, SP - Brazil

^[5] Inst Florestal Sao Paulo, BR-01059970 Sao Paulo - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: Tree Genetics & Genomes; v. 9, n. 2, p. 321-329, APR 2013.
• Citações Web of Science: 14
• Assunto(s): Resistência à doença Eucalipto Parâmetros genéticos Puccinia psidii

Resumo

The climates of the central and southern regions of So Paulo state in Brazil favor pathogens such as Puccinia psidii Winter, which causes a common and severe disease in Eucalyptus plantations under 2 years old. We studied genetic parameters including genotype by environment interaction (G x E) of resistance to P. psidii rust in Eucalyptus grandis at nine sites in So Paulo State. Open-pollinated progeny from ten `provenances' were established in a randomized complete block design; at individual sites there were from 134 to 160 progenies, from four to eight blocks, and five to six trees per plot. Significant provenance and progeny(provenance) differences were detected, as was G x E involving progeny(provenance). However, the G x E involved little if any rank changes, indicating that selection can be done efficiently at a single site, if the disease level is sufficient. The estimated coefficient of genetic variation among the progeny within provenances was high and variable among the sites (ranging from 11 % to 36.7 %), demonstrating different expression of genetic variability among the sites. The estimated heritability at the individual-tree level and within a plot ranged from low to intermediate (ranging from 0.04 to 0.46) and was high at the progeny-mean level (ranging from 0.30 to 0.86). Our study shows good prospects of controlling this disease by selection among and within progenies in a single site. (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