Estimativas de parâmetros genéticos e a variabilidade em procedências e progênies de Handroanthus vellosoi

• Autor(a) principal: Batista, Camila Moreira [UNESP]
• Data de Publicação: 2012
• Outros Autores: Freitas, Miguel Luiz Menezes, Moraes, Marcela Aparecida De [UNESP], Zanatto, Antonio Carlos Scatena, Santos, Pedro César Dos [UNESP], Zanata, Marcelo, Moraes, Mario Luiz Teixeira de [UNESP], Sebbenn, Alexandre Magno
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4336/2012.pfb.32.71.269; http://hdl.handle.net/11449/140841
• topic: Ex situ conservation; Tropical tree species; Population genetics; Quantitative genetics; Conservação ex situ; Espécies arbóreas tropicais; Genética de populações; Genética quantitativa

The present study aimed at estimating genetic parameters and variability among and within provenances for silvicultural traits of Handroanthus vellosoi (Toledo) Mattos, in provenances and progenies test stands, located at the Luiz Antônio Experimental Station (São Paulo State, Brazil). The test was established in the compact family block design, with two provenances (allocated in the plots), siz replicates and sub-linear plots of five plants, totalizing 35 progenies. Diameter at breast (DBH), plant height, cylindrical volume, stem form and survival at 24 years of age were evaluated. Significant differences among the provenances were observed only to the trait stem form. The analysis of deviance showed significant differences among progenies for the joint analysis of the provenances (experimental population), suggesting that the population has high genetic variation and indicating the possibility of genetic improvement by selection of the best progrnies. Heritability estimates in individual and family level ranged from low to moderate (26% for DBH, 32% for plant height, 24% for cylindrical volume, 27% for form and 36% for survival), confirming the possibility of genetic improvement by selection and that the provenances have potential to respond to the pressure of natural selection.