Autor(es): da Silva, Paulo Henrique Müller [UNESP] ; Brune, Arno ; Alvares, Clayton Alcarde ; Amaral, Weber Do ; de Moraes, Mario Luiz Teixeira [UNESP] ; Grattapaglia, Dario ; de Paula, Rinaldo Cesar [UNESP]
Data: 2019
Identificador Persistente: http://hdl.handle.net/11449/187239
Origem: Oasisbr
Assunto(s): Abiotic and biotic stress; Family selection; Genetic diversity; Genotype-environment interaction; Productivity and stability
Made available in DSpace on 2019-10-06T15:29:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Universidade de São Paulo
To identify stable and productive Eucalyptus urophylla S.T. Blake families across diverse climate zones in Brazil, we evaluated growth and survival of 322 open-pollinated families derived from 13 genetically improved seed sources in 10 trials across the country. Survival and growth data were analyzed using linear mixed models and REML/BLUP. Survival ranged from 51% to 92%, and the mean annual increment varied from 19 to 46 m 3 ·ha −1 ·year −1 . Although planted in suitable climatic zones, some trials had low survival and (or) productivity. Conversely, the highest productivity was recorded in a zone considered to be of low suitability. These results show the importance of assessing the climatic requirements of eucalypts beyond those determined from analyses of their natural distribution, especially when testing already improved seed sources. A number of productive and stable families were identified based on analysis of the interaction between genotype and environment, and from these, 144 individuals were selected and had their genetic diversity estimated using 19 microsatellite DNA markers. The genetic diversity of these selected trees was equivalent to that observed in previous studies of natural populations of E. urophylla, indicating that breeding programs of E. urophylla in Brazil still retain high levels of diversity for sustainable genetic gains.
Instituto de Pesquisa e Estudo Florestais (IPEF) Via Comendador Pedro Morganti, 3500 – Bairro Monte Alegre, CEP
School of Agriculture São Paulo State University (Unesp) Botucatu Rua José Barbosa de Barros, n° 1780, C.P. 237, CEP
Escola Superior de Agricultura “Luiz de Queiroz”/Universidade de São Paulo Avenida Pádua Dias 11, Caixa Postal 9, CEP
APSD – Ghana, Plot 27, Block 27
Escola Superior de Agricultura “Luiz de Queiroz”/Universidade de São Paulo, Avenida Pádua Dias 11, Caixa Postal 9, CEP
School of Engineering São Paulo State University (Unesp) Ilha Solteira, Av. Brasil Centro, 56, C.P. 31, CEP
Plant Genetics Laboratory EMBRAPA Genetic Resources and Biotechnology, CEP
Graduate Program in Genomic Sciences and Biotechnology Universidade Católica de Brasília, SGAN Qd 916, CEP
School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, km 5, CEP
School of Agriculture São Paulo State University (Unesp) Botucatu Rua José Barbosa de Barros, n° 1780, C.P. 237, CEP
School of Engineering São Paulo State University (Unesp) Ilha Solteira, Av. Brasil Centro, 56, C.P. 31, CEP
School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, km 5, CEP
FAPESP: 15/15651-2
