%0 Journal Article
%T Avalia  o de prog¨ºnies de maca¨²ba na fase juvenil e estimativas de parametros gen¨¦ticos e diversidade gen¨¦tica Evaluation of macaw palm progenies in juvenile phase and estimates of genetic parameters and genetic diversity
%A Candida Elisa Manfio
%A S¨¦rgio Yoshimitsu Motoike
%A Marcos Deon Vilela de Resende
%A Carlos Eduardo Magalh£¿es dos Santos
%J Pesquisa Florestal Brasileira
%D 2012
%I Embrapa Florestas
%R 10.4336/2012.pfb.69.63
%X A maca¨²ba (Acrocomia aculeata) ¨¦ uma palmeira oleaginosa e o extrativismo de seus frutos ¨¦ de grande importancia socioecon mica para os pequenos produtores rurais. O objetivo deste trabalho foi avaliar a variabilidade gen¨¦tica e obter informa  es sobre o controle gen¨¦tico de caracter¨ªsticas morfol¨®gicas relacionadas ao crescimento e vigor da maca¨²ba. Foram coletadas 51 prog¨ºnies em Minas Gerais e S o Paulo, as quais s o integrantes do banco ativo de germoplasma da Universidade Federal de Vi osa. Doze meses ap¨®s o plantio, essas prog¨ºnies foram avaliadas quanto ao crescimento da planta (cm) e n¨²mero de folhas emitidas. Estas caracter¨ªsticas apresentaram grande variabilidade entre as prog¨ºnies. As estimativas dos coeficientes de herdabilidade foram de 87% e 48%, para crescimento de planta e n¨²mero de folhas, respectivamente, revelando controle gen¨¦tico e boas perspectivas para o melhoramento. O m¨¦todo de Tocher mostrou-se eficiente em alocar as prog¨ºnies do Estado de S o Paulo em um mesmo grupo. O m¨¦todo de sele  o pelo ¨ªndice de rank m¨¦dio permitiu selecionar indiv¨ªduos e prog¨ºnies mais equilibrados em termos dos dois caracteres.   doi: 10.4336/2012.pfb.32.69.63 The macaw palm (Acrocomia aculeate) is an extraction oil palm and its fruit is of great socioeconomic importance for small farmers. The aim of this study was to evaluate the genetic variability and to obtain information about the genetic control of morphological traits related to growth and vigor of macaw palm. Fifty-one open pollinated progenies were collected in Minas Gerais and S o Paulo States, which are active members of the germplasm bank of Vi osa Federal University. These 51 progenies, twelve months after planting, were evaluated for plant growth and number of leaves emitted. The characteristics evaluated presented great variability among the progenies. Heritability coefficient of 87% and 48% were obtained for plant growth and leaf number emitted, respectively, revealing a high degree of genetic control and potential for the genetic breeding. The Tocher¡¯s method was efficient to allocate progenies from State of S o Paulo in the same group. The rank index selection method allowed the selection of more balanced progenies and individuals for the two traits, making possible to optimize the selection and obtain gains in all traits simultaneously.   doi: 10.4336/2012.pfb.32.69.63
%K Acrocomia aculeata
%K Variabilidade gen¨¦tica
%K Recursos gen¨¦ticos
%K Herdabilidade
%U http://www.cnpf.embrapa.br/pfb/index.php/pfb/article/view/283