Data/hora: 02/06/2024 03:38:32

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 19/08/2014
Data da última atualização: | 01/06/2017
Autoria: | PAVAN, B. E.; PAULA, R. C. de; PERECIN, D.; SCARPINATI, E. A.; CANDIDO, L. S.
Afiliação: | BRUNO ETTORE PAVAN; RINALDO CÉSAR DE PAULA; DILERMANDO PERECIN; EDIMAR APARECIDO SCARPINATI; LILIAM SILVIA CANDIDO.
Título: | Early selection in open-pollinated Eucalyptus families based on competition cavariates.
Ano de publicação: | 2014
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 49, n. 6, p. 483-492, jun. 2014.
Idioma: | Inglês
Notas: | Título em português: Seleção precoce em famílias de polinização aberta de Eucalyptus com base em covariáveis de competição.
Conteúdo: | The objetive of this work was to evaluate the influence of intergenotypic competition in open?pollinated families of Eucalyptus and its effects on early selection efficiency. Two experiments were carried out, in which the timber volume was evaluated at three ages, in a randomized complete block design. Data from the three years of evaluation (experiment 1, at 2, 4, and 7 years; and experiment 2, at 2, 5, and 7 years) were analyzed using mixed models. The following were estimated: variance components, genetic parameters, selection gains, effective number, early selection efficiency, selection gain per unit time, and coincidence of selection with and without the use of competition covariates. Competition effect was nonsignificant for ages under three years, and adjustment using competition covariates was unnecessary. Early selection for families is effective; families that have a late growth spurt are more vulnerable to competition, which markedly impairs ranking at the end of the cycle. Early selection is efficient according to all adopted criteria, and the age of around three years is the most recommended, given the high efficiency and accuracy rate in the indication of trees and families. The addition of competition covariates at the end of the cycle improves early selection efficiency for almost all studied criteria.
Palavras-Chave: | Competição intergenotípica; Intergenotypic competition; Métodos de seleção; Progeny tests.
Thesagro: | Teste de Progênie.
Thesaurus Nal: | Eucalyptus; Selection methods.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/106788/1/Early-selection-in-open.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (56597-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS