| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Estimates of genetic parameters for physic nut traits based in the germplasm two years evaluation
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| Autores: |
Laviola,Bruno Galvêas
Alves,Alexandre Alonso
Gurgel,Fábio de Lima
Rosado,Tatiana Barbosa
Rocha,Rodrigo Barros
Albrecht,Julio Cesar
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| Data: |
2012-03-01
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| Ano: |
2012
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| Palavras-chave: |
Jatropha curcas
Plant breeding
Quantitative genetic
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| Resumo: |
In spite of increasingly widespread interest in planting physic nut, breeding efforts are still in its infancy. In that context, an important resource recently established aiming future breeding efforts was the assembly of a germplasm bank with near 200 accessions. The objective of this study was to estimate genetic parameters, repeatibility coefficients and genetic correlation between seven traits, measured in 110 accessions (half sib families) of this germplasm bank in different stages of development. The results show that higher relative values of additive variance were only found for yield and height, and the existence of low environmental variation (either of temporary or permanent nature) among plots within blocks. Given the high repeatibility values found for all traits, on average three measurements are necessary to predict, accurately and efficiently, the true breeding value of an individual. Based on the results of genetic correlations, breeding effort should initially be use track trees with increased stem diameter, elevated number of branches and canopy volume so as to increase the chances of finding an exceptionally highly productive tree.
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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=S0103-84782012000300008
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/S0103-84782012000300008
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.42 n.3 2012
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| Direitos: |
info:eu-repo/semantics/openAccess
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