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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
02/06/2009 |
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Data da última atualização: |
30/11/2010 |
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Autoria: |
ARNHOLD, E.; SILVA, D. J. H. da; MELLO FILHO, O. L. de; VIANA, J. M. S. |
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Afiliação: |
EMMANUEL ARNHOLD, Universidade do Maranhão; DERLY JOSÉ HENRIQUES DA SILVA, UFV; ODILON LEMOS DE MELLO FILHO, CNPSo; JOSÉ MARCELO SORIANO VIANA, UFV. |
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Título: |
Inbreeding depression simulation in popcorn cultivars to estimate the effective population size for germplasm conservation. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Londrina, v. 7, n. 1, p. 87-93, Mar. 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
Nowadays the corn variability is preserved mainly in germplasm banks. A population maintained in a germplasm bank can lose genetic variability when regenerations are performed with an inadequate effective population size. We therefore aimed at an estimation of the effective population size that minimizes alterations in the plant means of ear height, prolificity index, weight of 100 grains, grain yield and expansion capacity after ten regenerations in six popcorn populations. Six populations and their respective selfed generations were appraised in complete blocks with two replications. Yield was the trait with the most pronounced inbreeding depression. Population Rosa-Claro presented the strongest depression for yield (94.3%) and was used to simulate different effective sample sizes. It was concluded that an effective sample size of 200 unrelated non-inbred plants is enough to minimize inbreeding depression after ten regenerations, in all analyzed traits in the six populations. |
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Palavras-Chave: |
Conservação de germoplasma; Depressão endogâmica; Tamanho efetivo. |
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Thesagro: |
Agricultura; Biotecnologia; Genética; Milho Pipoca. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01754naa a2200241 a 4500
001 1049137
005 2010-11-30
008 2007 bl uuuu u00u1 u #d
100 1 $aARNHOLD, E.
245 $aInbreeding depression simulation in popcorn cultivars to estimate the effective population size for germplasm conservation.
260 $c2007
520 $aNowadays the corn variability is preserved mainly in germplasm banks. A population maintained in a germplasm bank can lose genetic variability when regenerations are performed with an inadequate effective population size. We therefore aimed at an estimation of the effective population size that minimizes alterations in the plant means of ear height, prolificity index, weight of 100 grains, grain yield and expansion capacity after ten regenerations in six popcorn populations. Six populations and their respective selfed generations were appraised in complete blocks with two replications. Yield was the trait with the most pronounced inbreeding depression. Population Rosa-Claro presented the strongest depression for yield (94.3%) and was used to simulate different effective sample sizes. It was concluded that an effective sample size of 200 unrelated non-inbred plants is enough to minimize inbreeding depression after ten regenerations, in all analyzed traits in the six populations.
650 $aAgricultura
650 $aBiotecnologia
650 $aGenética
650 $aMilho Pipoca
653 $aConservação de germoplasma
653 $aDepressão endogâmica
653 $aTamanho efetivo
700 1 $aSILVA, D. J. H. da
700 1 $aMELLO FILHO, O. L. de
700 1 $aVIANA, J. M. S.
773 $tCrop Breeding and Applied Biotechnology, Londrina$gv. 7, n. 1, p. 87-93, Mar. 2007.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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