Análises biométricas em famílias de meios-irmãos de café Conilon oriundas de seleção recorrente

• Ano de defesa: 2013
• Autor(a) principal: Vicentini, Victor Bernardo
• Orientador(a): Oliveira, Aluízio Borém de
• Banca de defesa: Ferrão, Romário Gava , Fonseca, Aymbiré Francisco Almeida da , Silva, Felipe Lopes da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Coffea canephora; Seleção recorrente; Ganho de seleção
• Palavras-chave em Inglês: Coffea canephora; Recurrent selection; Selection gain
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/1231

The objective of this study was to evaluate the performance of a population of late maturity of Coffea canephora variety Conilon, derived from the first cycle of recurrent selection of Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural (INCAPER). The experiment was carried out at the experimental station of Marilândia/ES, in the municipality of Marilândia/ES (Brazil) in 2000, with a population comprised of 11 half siblings families with a total of 1,019 progenies. The following evaluations were performed in the period 2006-2011: a) yield (YD); b) time to fruit maturation (MAT); c) fruit size (FS); d) uniformity of fruit maturation (UMAT) and e) reaction to rust (RR). Based on data collected by progeny on each family, it was performed the analysis of genetic variability, estimation of genetic parameters, genetic gain and genetic diversity of selected progenies. Heritability estimates showed higher values for YD and FS, and the results obtained for the selection gains were therefore higher for both traits. Although for UMAT and RR the gains were smaller, it was possible to select individuals with better maturation and more tolerant to rust. The selection intensity in which it was achieved major gains was 50%, for selection between families and, 20% for selection within families, but it is suggested to use the selection intensity with higher probability of selection of progeny with contrasting genetically compatible. The results confirmed the existence of genetic variability for PROD, and MAT TF in the studied progenies, allowing the continuation of the recurrent selection process with success possibilities. During the analysis of genetic diversity there was progenies with great dissimilarity with good potential to be used as parents, but it is important to note that the overall dissimilarity between all progenies was small, indicating the need for the introduction of exotic materials in later cycles of recurrent selection, aiming to increase genetic variability of the population.