Avaliação de germoplasma para melhoramento e a conservação da macaúba

• Ano de defesa: 2014
• Autor(a) principal: Rueda, Rosa Angelica Plata
• Orientador(a): Motoike, Sérgio Yoshimitsu
• Banca de defesa: Bhering, Leonardo Lopes , Oliveira, Dario Alves 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 Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Macaúba; Acrocomia aculeata; Melhoramento genético; Diversidade genética; Caracterização fenotípica; Variabilidade morfológica
• Palavras-chave em Inglês: Macaúba; Acrocomia aculeata; Breeding; Genetic diversity; Phenotypic characterization; Morphological variability
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/1239

Ex Lodd Mart.) (Arecales: Arecaceae)] is a specie of great potential as oilseed for the feedstock production of bioenergetical, industrial and food processes. In a plant breeding program of this species is essential to evaluate the morphological characteristics of the accessions and their agronomic perfomance, it is important to distinguish different individuals in order to aggregate favorable alleles among these individuals for traits of interest. The aim of this study was to estimate the genetic divergence and genetic parameters through morphological variability among macaw palm progenies based on quantitative characters. Fifty-four progenies of A. aculeata belonging to the banco de germoplasma de palmáceas BGP- Macaúba (Araponga, Minas Gerais, Brasil) were evaluated using 27 morpho-agronomic characteristics in quantitative vegetative stage for two periods of dry winter and a wet summer period assessment. Genetic diversity was estimated based on Euclidean distance with mean standardized hierarchical clustering method (UPGMA) and Tocher optimization method. These methods are based on breeding values predicted by BLUP method. Analyses using principal components and Pearson correlation on phenotypic data were also performed. The genetic parameters estimated were: individual heritability in narrow sense, coefficient of genetic variance among families, coefficient of determination of permanent environmental effects, coeff1cient of determination of the effects of genotype by measuring coefficient of repeatability, genetic correlation across repeated measures and gains expected from selection based on breeding values predicted by BLUP method. The results of this study argued that there is high variability among the assessed progenies. The progenies formed groups related to geographical proximity. Early review (juvenile stage) is more informative than the later reviews. Seasonal reviews can interfere with the formation of groups by the UPGMA method. The results of the estimated genetic parameters maintained that there is excellent selective potential in this population and genetic variability enough for the plant breeding population in the medium and long term. In general, most of the features showed high heritability, high repeatability and low interaction of progenies by measurements. Superior progenies were identiñed for use in two cropping systems: monoculture and silvopastoral.