Estimation of genetic parameters and selection of Coffea canephora progenies evaluated in Brazilian Western Amazon.

• Autor(a) principal: BERGO, C. L.
• Data de Publicação: 2020
• Outros Autores: MIQUELONI, D. P., LUNZ, A. M. P., ASSIS, G. M. L. de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1123301
• topic: Café Conilon; Método REML/BLUP; Modelo mixto; Mixed model; Fitomejoramiento; Variación genética; Prueba de progenie; Ensayos de variedades; Análisis estadístico; Embrapa Acre; Acre; Rio Branco (AC); Amazônia Ocidental; Western Amazon; Amazonia Occidental; Café; Coffea Canephora; Parâmetro Genético; Melhoramento Genético Vegetal; Teste de Progênie; Comportamento de Variedade; Análise Estatística; Campo Experimental; Plant breeding; Genetic variation; Progeny testing; Variety trials; Statistical analysis

Coffee has emerged as an economic alternative culture in the State of Acre, Brazil, but without a clonal variety recommended for the state to overcome the unevenness presented by seed crops. Thus, in order to estimate genetic parameters and indicate progenies of Coffea canephora to compose a clonal variety for the State of Acre, yield, vegetative vigor and plant height were evaluated in five harvests of a randomized complete block experiment with 46 progenies, 4 repetitions and 10 plants per plot by mixed model methodology (REML/BLUP). The harvests were evaluated individually, by the model that considers one harvest, one location and the mean of progenies, and joint analysis (all harvests), by repeatability model with stability and temporal adaptability by the harmonic mean of relative performance of genotypic values method (MHPRVG), with genotypic values of progenies grouped by the Tocher method. There was variability, with possibility of selection, only for grain yield. The yield was strongly affected by production bienniality, with high environmental influence and harvests mean ranging from 14.13±4.60 to 46.20±14.94 bags ha-1 and individual heritabilities from 0.10 to 0.44. Sixteen ?Conilon? coffee progenies with selection gains above 23% were selected. The MHPRVG method allows the refinement of progeny selection throughout the harvests, identifying the most adapted and stable.