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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
01/06/2009 |
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Data da última atualização: |
30/11/2010 |
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Autoria: |
VIANA, J. M. S.; CONDÉ, A. B. T.; ALMEIDA, R. V. de; SCAPIM, C. A.; VALENTINI, L. |
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Afiliação: |
JOSÉ MARCELO SORIANO VIANA, UFV; AURINELZA BATISTA TEIXEIRA CONDÉ, UFV; RAMON VINÍCIUS DE ALMEIDA, UFV; CARLOS ALBERTO SCAPIM, UEM; LÚCIA VALENTINI, Pesagro-Rio. |
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Título: |
Relative importance of per se and topcross performance in the selection of popcorn S3 families. |
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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. 74-81, June 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this paper was to discuss the relative importance of per se and topcross performance in the selection of inbred families. The analyses, considering expansion volume and yield, were based on two trials of S 3 progenies from the popcorn population Beija-Flor, and six experiments with the corresponding topcross hybrids, derived from crosses with the tester Viçosa, another popcorn population. With respect to the estimates of heritabilities (assessment of the selection efficiency), predicted genetic gains, genotypic correlations and the percentages of coincidence between selected and non selected families, the equivalence with the selection procedures based on per se and topcross performance was good. The correspondence would certainly be greater if the genotypic correlations were of higher magnitude. The selection based simultaneously on the phenotypic values of progenies and hybrids tends to be satisfactory when the weights of the per se and topcross merits are proportional to the heritabilities. |
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Palavras-Chave: |
Famílias endógamas; Milho-pipoca Beija-Flor; Testcross; Topcross. |
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Thesagro: |
Agricultura; Biotecnologia; Genética. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01769naa a2200253 a 4500
001 1049120
005 2010-11-30
008 2007 bl uuuu u00u1 u #d
100 1 $aVIANA, J. M. S.
245 $aRelative importance of per se and topcross performance in the selection of popcorn S3 families.
260 $c2007
520 $aThe objective of this paper was to discuss the relative importance of per se and topcross performance in the selection of inbred families. The analyses, considering expansion volume and yield, were based on two trials of S 3 progenies from the popcorn population Beija-Flor, and six experiments with the corresponding topcross hybrids, derived from crosses with the tester Viçosa, another popcorn population. With respect to the estimates of heritabilities (assessment of the selection efficiency), predicted genetic gains, genotypic correlations and the percentages of coincidence between selected and non selected families, the equivalence with the selection procedures based on per se and topcross performance was good. The correspondence would certainly be greater if the genotypic correlations were of higher magnitude. The selection based simultaneously on the phenotypic values of progenies and hybrids tends to be satisfactory when the weights of the per se and topcross merits are proportional to the heritabilities.
650 $aAgricultura
650 $aBiotecnologia
650 $aGenética
653 $aFamílias endógamas
653 $aMilho-pipoca Beija-Flor
653 $aTestcross
653 $aTopcross
700 1 $aCONDÉ, A. B. T.
700 1 $aALMEIDA, R. V. de
700 1 $aSCAPIM, C. A.
700 1 $aVALENTINI, L.
773 $tCrop Breeding and Applied Biotechnology, Londrina$gv. 7, n. 1, p. 74-81, June 2007.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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