VARIAÇÃO GENÉTICA E SELEÇÃO EM TESTE DE PROCEDÊNCIAS DE Grevillea robusta A. Cunn
DOI:
https://doi.org/10.24278/2178-5031.2003151430Keywords:
provenance test, Grevillea robusra, genetic variation, selection, effective sizeAbstract
Selection seeking seeds production in provenance tests is an alternative in case of immediate necessity of seeds or impossibility of resampling of selected provenances. The aim of this study was to evaluate the genetic and phenotypic behavior of growth traits anel selection, in six Australian provenances of Grevillea robusra, at 11 years old, in Avaré State Forest, SP. The analysis of individual variance showed signifícant variation for ali traits at 1 % of probability among provenances, suggesting the gains possibility with selection of the best provenances. Analysis of distribution of genetic variation among and within p1·ovenances revealed that 97.2% of variation was within provenances, indicating the possibility of genetic gains with selection within provenances. Medium growth in DBH, height and cylindrical volume indicated the Wallaby Creek QLD and Subia Por936 provenances as the best performance. The genetic anel phenotypic correlations between traits were high (> 0.8) and si 0nifícant, allowing indirect gains in a trait with selection in another. The estimation of selection response of 28.4% of the best trees revealed the possibility of reasonable gains to traits: 0.87% to DBH, 0.98% to height and 3.26% to cylindrical volume. The estimate of effective number is enough to retain the genetic variability in triais.
Downloads
References
BAGGIO, A. S. Sistema agroflorestal Grevillea x café: início de nova era na agricultura paranaense. Curitiba: EMBRAPA-UFPFCS, 1983. 15 p. (Circular Técnica, 9) ..
BULIUCKAS, V. et ai. Genetic variation among and within populations of four Swedish hardwood species assfssed in a nursery triai. Silvae Geneticà, Frankfurt, v. 48, n. 1, p. 17-25, 1999.
CORREA, M. P. Dicionário de plantas úteis do Brasil e das exóticas cultivadas. Rio de Janeiro: Serviço de Informações Agrícolas, 1926. v. 3, p. 490-491.
CROW; J. F.; .KIMURA, M. A. An introd uction to population genetics theory. London : Harper & Row, 1970. 591 p.
FERREIRA, C. A.; MARTINS, E. G. O. Potencial da grevílea ( Grevillea robusta A. Cunn.) para reflorestamento. ln: SIMPÓSIO SOBRE "ESPÉCIES NÃO TRADICIONAIS PARA PLANTIOS COM FINALIDADES PRODUTIVAS E AMBIENTAIS", 1998, Crnitiba. Colombo: EMBRAPA, 1 998. p. 1 71-178.
FRANKEL, O. H.; SOULÉ, M. S. Conservation and evolution. Cambridge: Cambridge University Press, 1981. 327 p.
HALLAUER, A. R.; MIRANDA FILHO, J. B. Quantitative genetics in maize breeding. Ames: State Uni versity Press, 1988. 469 p.
HAMR,IÇK, J. L. Variation and selection in western montane species li. Variation within and between populations of White Fir on elevation transect. Theoretical and Applied Genetics, Bcrlin. v. 47, p. 27-34, 1976.
____ .; GODT, M. J. W. Al lozyme diversity in plant species. ln: BROWN, A. H. D. et ai. (Ed.). Plant population genetics, breeding and genetic resources. Sunderland: Sinauer Associates, 1990. p. 43-63 .
LI. P. e1 ai. Genetic variation in juvenile growth :rnd phenology in a Wh ite Spruce procedence rogeny test. Silvae Genetica, Frankfurt, v. 42, 11. 1, p. 52-60, 1993.
MORAES, M. L. T. Variabilidade genética por isoenzimas e caracteres quantitativos em duas populações naturais de aroeira Myracrodrion umundenvll F.F. & M.F. Allemão Anacardiaceae (Syn: Astrouium uruleuva (Fr. Allemão) Engler). 1993. 139 f. Tese (Doutorado em Genética e Melhoramento de Plantas) - Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba. S.A.S. INSTITUTE I NC. SAS procedures guide: Version 8 (TSMO). Cary, 1999. 454 p.
SEBBENN, A. M. et ai. Teste de procedências de Grevil!ea robusta A. Cunn. Rev. lnst. Flor., São Paulo, v. 11, n. 1, p. 65-73, 1999.
SEBBENN, A. M.; SIQUEIRA, A. C. M. De F.; GURGEL GARRIDO, L. M. do A. Interação progênies x locais e variabilidade genética em jequitibá-rosa - Carilliana /egalis (Mart.) O. Ktze. Rev. lnst. Flor., São Paulo, v. 1 2, n. 1, p. 1 3-23, 2000. Rcv. lnst. Flor .. São Paulo. I'. 1 5. n. 1. p. 1 -8. jun. 2003.
SIQUEIRA, A. C. M. De F. et ai. Distribuição da variação genética entre e dentro de populações de Ba/fourodendron riedeliaun (Engler) Engler para a conservação ex situ. Rev. lnst. Flor., São Paulo, V. J 2, n. 2, p. 89- ) 03, 2000.
VENCOVSK Y, R. Effective size of monoecious populations submitted to artificial selection. Brazil Journal Genetics, Ribeirão Preto, v. 1, 11. 3, p. 181-191, 1 978. W I LLEY, R. N. The use of shade in coffea, cocoa and tea. Horticultura! Abstracts, St. Joseph, V. 45, 11. J 2, J). 791-798, 1975 .
ZHENG, Y. O.; ENNOS, R.; WANG, H. R. Provenance variation and genetic parameters in a triai of Pinus caribaea Morrelet var. bahainensis and Golf. Forest Genetics, Zvolen, n. 1, v. 3, p. 165-174, 1994.
