AGUIAR, A. V. de

CAMBUIM, J.

MORAES, M. A. de

MORAES, M. L.

NEVES, G.

SILVA, P.

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 60 Abstract # Title, authors, abstract, or Bio, Keywords1498 Expected selection gain for resin-yielding in progenies test of Pinus caribaeavar. bahamensisMarcela Aparecida de Moraes1, Mario Luiz Moraes1, Generci Neves2, José Cambuim1, Paulo Silva3, Ananda Aguiar4 1State University of São Paulo – UNESP 2Resineves Company 3Instituto de Pesquisa e Estudos Florestais (IPEF) 4Forestry Embrapa The main resin-yielding species pines planted in Brazil are P. elliottii, P.caribaea var. bahamensis and P. caribaea var. hondurensis. The objective of this study was to estimate expected selection gain for resin-yielding in progenies of Pinus caribaea var. bahamensis to set a clonal seed orchard. The progenies test was established in Selvíria, Mato Grosso do Sul State, Brazil. The seeds used for this trial came from a clonal seed orchard of the Genetic Conservation and Improvement of Tropical Pine Center – CCGMPT, in Aracruz, State of Espírito Santo, Brazil. The experimental design was a 11 x 11 partially balanced square lattice, with 119 progenies from the CCGMPT and two commercial controls provided by Duratex company, with two replications. The progenies were evaluated during one year at 22 years age for resin productivity (kg tree ano-1). Genetic variation among individual and progenies was not significant for resin-yielding. Considering the expected progress for resin productivity, this germoplasm collection can be converted into a rogued seedling seed orchard, aiming the production of improved seed. An expected genetic gain of 1.5 % was obtained through forty open pollinated progeny selection at 22 years to resin- yielding. 1499 Expected genetic gains with selection of provenances and progenies PinusgreggiiA. Aguiar1, Janaina Spoladore2, Jarbas Shimizu3 1Forestry Embrapa 2Botanical Garden of Rio de Janeiro 3Autonomous Research Pinus greggii is considered an alternative species for reforestation in Brazil aiming wood production and mainly pulpwood. A trial with this species was established in Ponta Grossa municipality (Brazil) involving 72 open pollinated progenies from six Mexican provenances. The experimental design adopted was in randomized complete blocks with six-plant linear plots spaced 3 m x 3 m. Diameter at breast height stem qualities regarding straightness and forking were assessed at 11 years old. Analysis by using the SELEGEN- REM/BLUP software revealed significant variation in diameter at breast height stem among progenies and stem shape among provenances. Substantial genetic variation coefficient and heritability suggested the possibility for expressive gains through selection among and within progenies. 

Expected selection gain for resin-yielding in progenies test of Pinus caribaea var. bahamensis.

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