Diversidade genética entre acessos de Coffea canephora do banco de germoplasma de Minas Gerais

• Ano de defesa: 2014
• Autor(a) principal: Baffa, David Carlos Ferreira
• Orientador(a): Cruz, Cosme Damião
• Banca de defesa: Pereira, Antonio Alves , Oliveira, Antônio Carlos Baião de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Genética e Melhoramento
• Departamento: Genética animal; Genética molecular e de microrganismos; Genética quantitativa; Genética vegetal; Me
• País: BR
• Palavras-chave em Português: Café - Melhoramento genético; Banco de germoplasma; Café - Cultivo
• Palavras-chave em Inglês: Coffee - Genetic improvement; Germplasm bank; Coffee - Growing
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA::GENETICA E MELHORAMENTO FLORESTAL
• Link de acesso: http://locus.ufv.br/handle/123456789/1410

In a breeding program, the study of genetic diversity in germplasm banks (BAGs) is of paramount importance, especially at the beginning of the program, the definition of strategies work. Thus, this study aimed to estimate the genetic variability of the accessions of C. canephora Pierre ex A. Froehner) the Germplasm Bank of Agricultural Research Company of Minas Gerais (EPAMIG), for 11 morpho-agronomic characteristics for the development of future cultivars for the state of Minas Gerais. The experiment consisted of 67 genotypes of C. canephora var. kouillou and three public witnesses and 44 genotypes of C. canephora var. Robust and two common witnesses. The experimental design was a randomized complete block design with five replicates and experimental plots consisting of a plant, spaced 3.0 x 1.5 m. Statistics and biometric analyzes were performed considering the linear mixed models (REML procedure / BLUP), through Selegen software, whose variance components are estimated by restricted maximum likelihood (REML) method and predicted genotypic values by best linear unbiased prediction biased (BLUP). Genetic divergence was studied by multivariate procedures employing the Mahalanobis distance and clustering methods Tocher. Through analysis of deviance was found that there was no presence of genetic variability for all characters between genotypes studied groups. The Tocher method, the population kouillou gathered the 70 genotypes into 3 groups and the population Robusta met the 46 genotypes into 9 different groups. Intrapopulation crosses between upper and divergent genotypes were shown to generate greater genetic variability of offspring to be explored in order to increase the probability of obtaining superior individuals. So with the existence of genetic variability in the population is a basic condition for the breeding program Coffea canephora of Minas Gerais succeeds.