VARIAÇÃO GENÉTICA EM PROCEDÊNCIAS E PROGÊNIES DE Pinus patula ssp. tecunumanii NO NOROESTE DO ESTADO DE SÃO PAULO
DOI:
https://doi.org/10.24278/2178-5031.2005171468Keywords:
tree breeding, genetic parameters, selection, coancestry, status numberAbstract
A combined provenance-progeny test of P. patula ssp. tecunumanii was established in Bento Quirino Experimental Station, São Simão, São Paulo State, Brazil, in a “compact family” blocks design with 10 provenances, 6 to 20 families per provenance, four individuals per subplot and seven replications. Variation among and within provenances and families and genetic parameters for DBH, height and stem form were investigated, about 14 years after planting. Analyses of variation for all traits revealed significant differences among provenances and height and stem form revealed significant differences among families within provenances. The evaluation of components of variation showed that provenance (ranging from 1.25 to 4.56%) and family/provenance effects (ranging from 0.61 to 3.97%) had little contribution to total variance and, thus, the high portion of the variation is found within family/provenance (ranging from 91.47 to 98.14%). The evaluation of DBH and height growth showed, respectively, San Esteban and Villa Santa, provenances from Honduras with the best and Las Piedrecitas, provenance from Mexico, with the worst for site of trial. The evaluation of stem form showed San Rafael del Norte provenance from Nicaragua, with the best and the Mount Pine Ridge, provenance from Belize, with the worse. Narrow sense individual ( h2 i ) and within family ( h2 d ) heritability values were low for all traits, ranged from 0.0125 to DBH to 0.1107 for stem form. Family heritability ( h2 m ) ranged from low (0.1148) to high (0.4199) for stem form. For DBH, height and stem form, the expected genetic gains were 6.36, 5.59 and 20.48%, respectively. These gains are for Pinus patula ssp. tecunumanii plantations at 14 years of age and in similar environments to the trial site.
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BIERKS, J. S.; BARNES, R. D. Provenance variation in Pinus caribaea, P. oocarpa and P. patula ssp. tecunumanii. Oxford: Oxford Forestry Institute, University of Oxford, 1990. 40 p. (Tropical Forestry Papers, 21).
BRIDGWATER, F. Mating designs. In: FINS, L; FRIEDMAN, S. T.; BROTSCHOL, J. V. (Ed.). Handbook of quantitative forest genetics. Dordrecht: Kluwer Academic Publishers, 1992. cap. 3, p. 69-95.
BURCZYK, J.; LEWANDOWSKI, A.; CHALUPKA, W. Local pollen dispersal and distant gene flow in Norway spruce (Picea abies (L.) Karst.). Forest Ecology and Management, Amsterdam, v. 197, p. 39-48, 2004.
EQUILEZ, P. T.; PERRY Jr., J. P. Pinus tecunumanii una especie nueva de Guatemala. Ciencia Forestal, Lleida, v. 41, n. 8, p. 3-22, 1983. ETTORI, L. C. et al. Teste de procedências de Pinus oocarpa Schiede em três locais do Estado de São Paulo. Rev. Inst. Flor., São Paulo, v. 14, n. 1, p. 39-51, 2002.
FERREIRA, M.; KAGEYAMA, P. Y. Programme for genetic improvement of populations of Pinus oocarpa Schiede in Brazil by the IPEF. In: NIKLES, D. G.; BURLEY, J.; BERNES, R. D. PROCEEDINGS OF A JOINT WORKSHOP ON PROGRESS AND PROBLEMS OF GENETIC IMPROVEMENT OF TROPICAL FOREST TREES. Oxford: Commonwealth Forestry Institute, 1977. p. 643-654.
LIMA, R. T. Comportamento de espécies/procedências tropicais do gênero Pinus em Felixlândia/MG-Brasil, Região de Cerrado: 2 – Pinus patula ssp. tecunumanii. Revista Árvore, Viçosa, v. 15, n. 1, p. 1-9, 1991.
LINDGREN, D.; GEA, L.; JEFFERSON, P. Loss of genetic diversity by status number. Silvae Genetica, Frankfurt, v. 45, p. 52-59, 1996.
________.; LUIGI, D. G.; JEFFERSON, P. A. Status number for measuring genetic diversity. Forest Genetics, Svolen, v. 4, n. 2, p. 69-76, 1997
MITTON, J. B.; LATTA, R. G.; REHFELDT, G. E. The pattern of inbreeding in washoe pine and survival of inbreed progeny under optional environmental conditions. Silvae Genetica, Frankfurt, v. 46, n. 4, p. 215 - 219, 1997.
MORAES, M. L. T. Variação genética e aplicação de análise multivariada em progênies de Pinus caribaea var. bahamensis Barret et Golfari. 2001. 124 f. Tese (Livre Docência em Silvicultura) - Universidade Estadual Paulista “Julio de Mesquita Filho”, Ilha Solteira.
NAMKOONG, G. Introduction to quantitative genetics in forestry. Washington, D.C.: United States Forest Service, 1979. 342 p. (Technical Bulletin, 1588). S.A.S. INSTITUTE INC. SAS procedures guide. Version 8 (TSMO). Cary, 1999. 454 p.
SEBBENN, A. M. et al. Variação genética entre e dentro de procedências e progênies de Araucaria angustifolia (Bert.) O. Ktze. no sul do Estado de São Paulo. Rev. Inst. Flor., São Paulo, v. 15, n. 2, p. 109-124, 2003.
SILVA Jr., F. G et al. Avaliação da qualidade da madeira de Pinus patula var. tecunumanii visando à produção de celulose Kraft e pasta mecânica. In: CONGRESSO ANUAL DE CELULOSE E PAPEL DA ABTCP, 26., 1993, São Paulo. Anais... São Paulo: Associação Brasileira Técnica de Celulose e Papel, 1993. p. 357-365.
STYLES, B. T.; HUGHES, C. E. Variabilidad de los Pinus centroamericanos: taxonomia y nomenclatura de los Pinus y otras Gimnospermas. Honduras: Escuela Nacional de Ciencias Forestales, Centro Nacional de Investigación Forestal Aplicada - CENIFA, 1988. 20 p.
TOLEDO FILHO, D. V. de ; PIRES, C. L. da S. Comportamento do Pinus caribaea var. hondurensis Barr. et Golf. aos 16 anos em diferentes espaçamentos sem desbaste. In: SIMPÓSIO IUFRO EM MELHORAMENTOGENÉTICOEPRODUTIVIDADE DE ESPÉCIES FLORESTAIS DE RÁPIDO CRESCIMENTO, 1983, Águas de São Pedro. Anais... São Paulo: Sociedade Brasileira de Silvicultura - SBS, 1983. p. 229-230. (Silvicultura, São Paulo, v. 29, 1983).
VENTURA, A.; BERENGUT, G.; VICTOR, M. A. M. Características edafo-climáticas das dependências do Serviço Florestal do Estado de São Paulo. Silvic. S. Paulo, São Paulo, v. 4, p. 57-140, 1965/66.
WRIGHT, J. W. A simplified design for combined provenance and progeny testing. Silvae Genetica, Frankfurt, v. 27, n. 2, p. 68-70, 1978.
________.; GIBSON, G. L.; BARNES, R. D. Variación en volumen y densidad de la madera de ocho procedencias de Pinus oocarpa y P. patula ssp. tecunumanii en Conocoto, Ecuador. IPEF, Piracicaba, v. 41/42, p. 5-7, 1989.
ZHENG, Y. O.; ENNOS, R.; WANG, H. R. Provenance variation and genetic parameters in a trial of Pinus caribaea Morrelet var. bahamensis and Golf. Forest Genetics, Zvolen, n. 1, v. 3, p. 165-174, 1994.
