| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Estimation of variance components and prediction of breeding values in rubber tree breeding using the REML/BLUP procedure
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| Autores: |
Furlani,Renata Capistrano Moreira
Moraes,Mario Luiz Teixeira de
Resende,Marcos Deon Vilela de
Furlani Junior,Enes
Gonçalves,Paulo de Souza
Valério Filho,Walter Veriano
Paiva,João Rodrigues de
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| Data: |
2005-01-01
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| Ano: |
2005
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| Palavras-chave: |
Linear mixed model
Effective population size
Breeding strategies
Rubber tree improvement
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| Resumo: |
The present paper deals with estimation of variance components, prediction of breeding values and selection in a population of rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell.-Arg.] from Rio Branco, State of Acre, Brazil. The REML/BLUP (restricted maximum likelihood/best linear unbiased prediction) procedure was applied. For this purpose, 37 rubber tree families were obtained and assessed in a randomized complete block design, with three unbalanced replications. The field trial was carried out at the Experimental Station of UNESP, located in Selvíria, State of Mato Grosso do Sul, Brazil. The quantitative traits evaluated were: girth (G), bark thickness (BT), number of latex vessel rings (NR), and plant height (PH). Given the unbalanced condition of the progeny test, the REML/BLUP procedure was used for estimation. The narrow-sense individual heritability estimates were 0.43 for G, 0.18 for BT, 0.01 for NR, and 0.51 for PH. Two selection strategies were adopted: one short-term (ST - selection intensity of 8.85%) and the other long-term (LT - selection intensity of 26.56%). For G, the estimated genetic gains in relation to the population average were 26.80% and 17.94%, respectively, according to the ST and LT strategies. The effective population sizes were 22.35 and 46.03, respectively. The LT and ST strategies maintained 45.80% and 28.24%, respectively, of the original genetic diversity represented in the progeny test. So, it can be inferred that this population has potential for both breeding and ex situ genetic conservation as a supplier of genetic material for advanced rubber tree breeding programs.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200017
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572005000200017
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.28 n.2 2005
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| Direitos: |
info:eu-repo/semantics/openAccess
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