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Provedor de dados:  Genet. Mol. Biol.
País:  Brazil
Título:  Genetic variability and selection for laticiferous system characters in Hevea brasiliensis
Autores:  Gonçalves,Paulo de Souza
Cardinal,Átila Bento Beleti
Costa,Reginaldo Brito da
Bortoletto,Nelson
Gouvêa,Lígia Regina Lima
Data:  2005-09-01
Ano:  2005
Palavras-chave:  Hevea brasiliensis
Rubber yield
Laticiferous traits
Genetic parameters
Resumo:  Six laticiferous system characters were investigated in 22 three-year-old, half-sib rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.] progenies, evaluated at three sites (Votuporanga, Pindorama and Jaú, all in the São Paulo State, Brazil). The traits examined were: average rubber yield (Pp), average bark thickness (Bt), number of latex vessel rings (Lv), average distance between consecutive latex vessel rings (Dc), density of latex vessels per 5 mm per ring averaged over all rings (Dd) and the diameter of the latex vessels (Di). The joint analysis showed that site effect and progeny x sites interaction were significant for all traits, except Lv. Estimates of individual heritabilities across the three sites were high for Bt; moderate for Lv, Pp and Dc; low for Dd and very low for Di. Genetic correlations in the joint analysis showed high positive correlations between Pp and the other traits. Selecting the best five progenies would result in genetic gains of 24.91% for Pp while selecting best two plants within a progeny would result in a Pp genetic gain of 30.98%.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300014
Editor:  Sociedade Brasileira de Genética
Relação:  10.1590/S1415-47572005000300014
Formato:  text/html
Fonte:  Genetics and Molecular Biology v.28 n.3 2005
Direitos:  info:eu-repo/semantics/openAccess
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