Data/hora: 06/06/2024 09:10:36

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 02/07/2013
Data da última atualização: | 14/06/2017
Autoria: | VERARDI, C. K.; SCALOPPI JUNIOR, E. J.; SILVA, G. A P.; GOUVÊA, L. R. L.; GONÇALVES, P. de S.
Afiliação: | Cecília Khusala Verardi, Instituto Agronômico; Erivaldo José Scaloppi Junior, Agência Paulista de Tecnologia dos Agronegócios, Departamento de Descentralização do Desenvolvimento, Polo Regional Noroeste Paulista; Guilherme Augusto Peres Silva, Instituto Agronômico; Lígia Regina Lima Gouvêa, Instituto Agronômico; Paulo de Souza Gonçalves, Instituto Agronômico.
Título: | Genetic parameters and estimated genetic gains in young rubber tree progenies.
Ano de publicação: | 2013
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 4, p. 411-416, abr. 2013.
Idioma: | Inglês
Notas: | Título em português: Parâmetros genéticos e ganhos de seleção estimados em progênies jovens de seringueira.
Conteúdo: | The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty?two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi?effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5?year?old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies
Palavras-Chave: | Annual girth growth; Crescimento anual do caule; Effective population size; Eleção precoce; Índice multiefeito; Multi-effect index; Produção de borracha; Tamanho efetivo populacional.
Thesagro: | Hevea Brasiliensis.
Thesaurus Nal: | Early selection.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/85311/1/Genetic-paameters.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (54833-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS