%0 Journal Article
%T Genetic analysis of half-sib progenies of Theobroma grandiflorum An¨¢lise gen¨¦tica de fam¨ªlias de meios-irm os de cupua uzeiro
%A Maria Clideana Cabral Maia
%A Marcos Deon Vilela de Resende
%A Lu¨ªs Cl¨¢udio de Oliveira
%A Rafael Mois¨¦s Alves
%J Pesquisa Florestal Brasileira
%D 2011
%I Embrapa Florestas
%R 10.4336/2012.pfb.66.123
%X The cupua uzeiro (Theobroma grandiflorum), species native from the Amazon region, has been domesticated presenting a broad genetic variability, and thus favorable conditions for establishing of strategies to breeding and genetic conservation. The aim of this work was to evaluate 36 half-sib progenies of Theobroma grandiflorum obtained from a stratified mass selection in farmers areas based on primary components of yield. The experiment for selection of elite progenies was set up in a randomized complete block design with three replications and four plants per plot. The fruit traits (length and width, in cm) and components of production (average weight of fruit/plant; average weight of pulp with seeds/plant and average weight of pulp/plant, in g) were evaluated. The data were analyzed through the methodology of REML/BLUP using the Selegen software. Analysis of grouping was performed using the matrix of genetic euclidean distances and Mahalanobis. The experimental population allowed the selection of superior parents for formation of base population to be used in the genetic improvement of cupua u. Among the 36 analyzed lineages only the genotypes 9, 10 and 18 showed genetic divergence and they can be recommended with some lineage of group 1 that demonstrates agronomic superiority to form base population of experimental clones with high genetic dissimilarity. doi: 10.4336/2011.pfb.31.66.123 O cupua uzeiro, esp¨¦cie nativa da regi o Amaz nica, encontra-se em processo de domestica  o, apresentando ampla variabilidade gen¨¦tica e condi  es favor¨¢veis para o estabelecimento de estrat¨¦gias de melhoramento e conserva  o. O objetivo foi avaliar geneticamente 36 prog¨ºnies de meios-irm os de cupua u oriundos de sele  o massal estratificada em ¨¢reas de produtores, com base nos componentes prim¨¢rios da produtividade. O experimento para sele  o das prog¨ºnies superiores foi instalado no delineamento aleatorizado em blocos, com quatro plantas por parcela e tr¨ºs repeti  es. Foram consideradas as vari¨¢veis de caracteriza  o do fruto (comprimento e largura, ambos em cent¨ªmetro) e componentes de produ  o avaliados em grama (peso m¨¦dio de fruto por planta, peso m¨¦dio de polpa com sementes por planta e peso m¨¦dio de polpa por planta). Os dados foram analisados atrav¨¦s da metodologia REML/BLUP com o emprego do software Selegen. Para realizar o agrupamento, utilizaram-se matrizes de distancias euclidianas gen¨¦ticas e de Mahalanobis. A popula  o experimental possibilitou a sele  o de parentais superiores para forma  o de popula  o base para o melhoramento gen¨¦tico do cupua u. Das
%K Theobroma grandiflorum
%K Melhoramento
%K Sele  o precoce
%U http://www.cnpf.embrapa.br/pfb/index.php/pfb/article/view/54