title: Adaptability and stability of conilon coffee in areas of high altitude.
abstract: In view of the predicted models of global climate change and differences in prices and production costs, there is increased interest in Coffea canephora cultivation in areas of high altitude. However, this species is sensitive to low temperatures, where genotypes vary regarding adaptation/tolerance mechanisms, demonstrating genotype x environment interaction. The aim of this study was to evaluate the stability and adaptability of C. canephora varieties in high-altitude areas. The experiments were carried out in February 2004, in Bom Jesus do Itabapoana, Rio de Janeiro State, Brazil, at an altitude of 725 m. Four clonal varieties (EMCAPA 8111, EMCAPA 8121, EMCAPA 8131, and EMCAPA 8151) and five harvests (2006 to 2010) were used. The experimental design was randomized blocks with four treatments and six plots, with 12 plants in each plot and spaced 2.5 x 1.2 m. Adaptability and stability parameters were determined using methods based on nonparametric analysis and analysis of variance. The results showed that the EMCAPA 8131 had the best performance according to stability and adaptability parameters and may be promising for high-altitude regions.
authors.affiliation: Embrapa Mandioca e Fruticultura, Núcleo de Recursos Genéticos e Desenvolvimento de Variedades, Cruz das Almas, BA, Brasil.
authors.forename: D H G S
authors.initials: DH
authors.lastname: Barbosa
authors.affiliation: Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil wevertonuenf@hotmail.com.
authors.forename: W P
authors.initials: WP
authors.lastname: Rodrigues
authors.affiliation: Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
authors.forename: H D
authors.initials: HD
authors.lastname: Vieira
authors.affiliation: Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, ES, Brasil.
authors.forename: F L
authors.initials: FL
authors.lastname: Partelli
authors.affiliation: Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
authors.forename: A P
authors.initials: AP
authors.lastname: Viana
mesh_terms: D000222:Adaptation, Physiological; D000531:Altitude; D003069:Coffee / Q000235:genetics* / Q000502:physiology; D017343:Genes, Plant
chemical_list: D003069:Coffee