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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
20/11/1992 |
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Data da última atualização: |
20/11/1992 |
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Autoria: |
FERERES, E.; GIMENEZ, C.; FERNANDEZ, J. M. |
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Afiliação: |
University of Cordoba, Apartado 3048. 14071 Cordoba, Spain. |
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Título: |
Genetic variability in sulflower cultivars under drought. I Yield relationships. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v.37, p.573-582, 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Field experiments were conducted between 1981 and 1983 at Cordoba, Spain, to evaluate the yield responses to drought of 53 sunflower genotypes. There was substantial variability among genotypes both in dryland yield potential, estimated as the yield under frequent irrigation. No association was found between yield potential and the drought suscetibility index, suggesting that drought resistance and hight yield potential may be combined in improved sunflower cultivars. Water deficits reduced harvest index (HI) in all genotypes but the decreases in HI varied among genotypes. Excellent correlations were found between HI and grain yield under dryland conditions for genotypes with similar length of season. The reduction in HI due to water deficits was mostly due to adjustments in seed number with less variation in individual seed weight. In turn, the reduction in seed number was due to a combination of reduced head size and of the area having viable seeds. The length of season of the genotypes apparently affected the yield component adjustments in response to water deficits. |
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Palavras-Chave: |
Cultivar; Genetic; Relacao; Relationship; Sunflower; Variabilidade genetica; Yield. |
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Thesagro: |
Girassol; Rendimento; Seca. |
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Thesaurus Nal: |
drought. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01802naa a2200277 a 4500
001 1457611
005 1992-11-20
008 1986 bl --- 0-- u #d
100 1 $aFERERES, E.
245 $aGenetic variability in sulflower cultivars under drought. I Yield relationships.
260 $c1986
520 $aField experiments were conducted between 1981 and 1983 at Cordoba, Spain, to evaluate the yield responses to drought of 53 sunflower genotypes. There was substantial variability among genotypes both in dryland yield potential, estimated as the yield under frequent irrigation. No association was found between yield potential and the drought suscetibility index, suggesting that drought resistance and hight yield potential may be combined in improved sunflower cultivars. Water deficits reduced harvest index (HI) in all genotypes but the decreases in HI varied among genotypes. Excellent correlations were found between HI and grain yield under dryland conditions for genotypes with similar length of season. The reduction in HI due to water deficits was mostly due to adjustments in seed number with less variation in individual seed weight. In turn, the reduction in seed number was due to a combination of reduced head size and of the area having viable seeds. The length of season of the genotypes apparently affected the yield component adjustments in response to water deficits.
650 $adrought
650 $aGirassol
650 $aRendimento
650 $aSeca
653 $aCultivar
653 $aGenetic
653 $aRelacao
653 $aRelationship
653 $aSunflower
653 $aVariabilidade genetica
653 $aYield
700 1 $aGIMENEZ, C.
700 1 $aFERNANDEZ, J. M.
773 $tAustralian Journal of Agricultural Research$gv.37, p.573-582, 1986.
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Embrapa Soja (CNPSO) |
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| 1. |  | BULING, A.; FORNELINO, A. C.; RUAS, J.; WENDT, L. W.; FARIAS, N. A. da R.; PINHEIRO, M. S.; CASADO, N.; GIMÉNEZ, C.; VALEIRÓN, C. R.; PENÃFIEL, G. D.; CARRETERO, J. C. B. The role of wild mammals as reservoir hosts of Babesia and Theileria. Parassitologia, Palermo, v. 49, suppl. 1, p. 79, maio, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
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