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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
31/03/2000 |
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Data da última atualização: |
17/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FERREIRA, M. A. J. F.; VENCOVSKY, R.; VIEIRA, M. L. C.; QUEIROZ, M. A. de. |
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Afiliação: |
MARIA ALDETE JUSTINIANO F FERREIRA, UNIVERSIDADE DE SÃO PAULO; R. VENCOVSKY, UNIVERSIDADE DE SÃO PAULO; M. L. C. VIEIRA, UNIVERSIDADE DE SÃO PAULO; MANOEL ABILIO DE QUEIROZ, CPATSA. |
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Título: |
Outcrossing rate and implication for the improvement of a segregating population of watermelon. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Acta Horticulturae, n. 510, p. 47-54, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
This stady was aimed at estimating the natural outcrossing rate(t=1-s) of a partially andromonoecius segregating population (with 53.3% monoecious and 46.7% andromonoecious plants) of watermelon, the results being discussed from the perspective of the plant breeder. Twelve maternal families, each composed of 23 individuals plus the corresponding seed parents, were genotyped with RAPD markers. The MLDT (Multilocus Estimation of Outcrossing with Dominant Markers) procedure was used, considering a mixed mating system model. The following estimates were obtained with reasonable consistency over families: average coefficient of inbreeding, F=0.091; multilocus outcrossing rate, tm=0.765. The results indicated that this population practices a mixture of selfing and outcrossing for reproduction, and this has several implications on breeding strategies, such as: for recurrent selection, more than one generation is required for attaining a condition close to equilibrium; even without epistasis progress from recurrent selection is no longer a function of additive variance alone, depending also on D1 (which may be negative) and D2; and immediate and permanent progress tend to be different and are not easily estimatable. The need for estimating the outcrossing rate is stressed for populations that are not typically allogamic or autogamic. |
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Palavras-Chave: |
Auto-polinizacao; Melhoramento de planta; Polinizacao cruzada; RAPD; Watermelon. |
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Thesagro: |
Citrullus Lanatus; Marcador Molecular; Melancia. |
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Thesaurus Nal: |
genetic markers; inbreeding; outcrossing; plant breeding; watermelons. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02210naa a2200313 a 4500
001 1133875
005 2024-07-17
008 2000 bl uuuu u00u1 u #d
100 1 $aFERREIRA, M. A. J. F.
245 $aOutcrossing rate and implication for the improvement of a segregating population of watermelon.
260 $c2000
520 $aThis stady was aimed at estimating the natural outcrossing rate(t=1-s) of a partially andromonoecius segregating population (with 53.3% monoecious and 46.7% andromonoecious plants) of watermelon, the results being discussed from the perspective of the plant breeder. Twelve maternal families, each composed of 23 individuals plus the corresponding seed parents, were genotyped with RAPD markers. The MLDT (Multilocus Estimation of Outcrossing with Dominant Markers) procedure was used, considering a mixed mating system model. The following estimates were obtained with reasonable consistency over families: average coefficient of inbreeding, F=0.091; multilocus outcrossing rate, tm=0.765. The results indicated that this population practices a mixture of selfing and outcrossing for reproduction, and this has several implications on breeding strategies, such as: for recurrent selection, more than one generation is required for attaining a condition close to equilibrium; even without epistasis progress from recurrent selection is no longer a function of additive variance alone, depending also on D1 (which may be negative) and D2; and immediate and permanent progress tend to be different and are not easily estimatable. The need for estimating the outcrossing rate is stressed for populations that are not typically allogamic or autogamic.
650 $agenetic markers
650 $ainbreeding
650 $aoutcrossing
650 $aplant breeding
650 $awatermelons
650 $aCitrullus Lanatus
650 $aMarcador Molecular
650 $aMelancia
653 $aAuto-polinizacao
653 $aMelhoramento de planta
653 $aPolinizacao cruzada
653 $aRAPD
653 $aWatermelon
700 1 $aVENCOVSKY, R.
700 1 $aVIEIRA, M. L. C.
700 1 $aQUEIROZ, M. A. de
773 $tActa Horticulturae$gn. 510, p. 47-54, 2000.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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| Registros recuperados : 52 | |
| 15. |  | STUEPP, C. A.; BITENCOURT, J. de; WENDLING, I.; KOEHLER, H. S.; ZUFFELLATO-RIBAS, K. C. Age of stock plants, seasons and iba effect on vegetative propagation of Ilex paraguariensis. Revista Árvore, Viçosa, MG, v. 41, n. 2, e410204, Jun. 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Florestas. |
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| 16. | | WENDLING, I.; STUEPP, C. A.; SANTIN, D.; ZUFFELLATO-RIBAS, K. C. Clonal forestry of Araucaria angustifolia: plants produced by grafting and cuttings can be used for wood production. Revista Árvore, Viçosa, MG, v. 41, n. 1, e410117, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Florestas. |
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| 18. | | STUEPP, C. A.; BITENCOURT, J. de; WENDLING, I.; KOEHLER, H. S.; ZUFFELLATO-RIBAS, K. C. Métodos de resgate e idades cronológicas de plantas-matrizes no enraizamento de brotações epicórmicas de Ilex paraguariensis. Ciência Florestal, Santa Maria, v. 27, n. 4, p. 1409-1413, out./dez. 2017.| Tipo: Nota Técnica/Nota Científica |
| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 52 | |
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