Variação fenotípica para caracteres silviculturais em populações de Aspidosperma spp. sem estrutura de progênies

Content Provider	Semantic Scholar
Author	Recco, C. R. S. B. Santos, Wanderley Dantas Dos Souza, Danilla Cristina Lemos Cambuim, José Moraes, Marcela Aparecida De Silva, Alexandre Marques Da Freitas, Miguel Luiz Menezes Moraes, Mario
Copyright Year	2016
Abstract	This study aimed to estimate genetic parameters for the silvicultural traits: diameter at breast height, total height and survival in Aspidosperma polyneuron Müll.Arg. and Aspidosperma cylindrocarpon Müll.Arg., for ex situ conservation and forest restoration purposes. Open pollinated seeds of both species were obtained from natural populations in Andradina-SP, Brazil. The provenance test was installed at Fazenda de Ensino e Pesquisa FEPE/UNESP, in 1997, with the species of mahogany intercropped with Inga marginata Willd. (ingá feijão), in alternate rows. The experimental design was randomization block with two treatments (species of Aspidosperma), 32 replications and four plants per plot in linear plots. Diameter breast height – DBH, plant height – H and survival – S were measured at 15 years of age and genetic parameters were estimated by SELEGEN program. The species A. cylindrocarpon showed greater development in growth characters (DBH and H) compared to A. polyneuron. The survival rate was 71% showing good adaptability for both species to the place of experiment implementation. The accuracy was high, suggesting greater reliability of statistical analysis. Heritability was moderate, indicating considerable genetic control in the species when it is observed that the coefficient of determination within plot was less than 10% for H and DBH, showing that the linear plots are homogeneous, that is, the experimental design was efficient. Therefore, the absence of the use of progenies structure in the studied populations of Aspidosperma spp. did not preclude that relevant information about the natural populations of Aspidosperma were obtained, but it is noteworthy that it is very important that new seed collections must be carried to a study based on progeny test.
Starting Page	49
Ending Page	57
Page Count	9
File Format	PDF HTM / HTML
DOI	10.4322/rif.2016.003
Volume Number	28
Alternate Webpage(s)	http://doi.editoracubo.com.br/10.4322/rif.2016.003
Alternate Webpage(s)	https://doi.org/10.4322/rif.2016.003
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article