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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
04/06/2009 |
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Data da última atualização: |
30/11/2010 |
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Autoria: |
NAVARINI, A. P. G.; SCHIFINO-WITTMANN, M. T.; BARROS, I. B. I. de; ALMEIDA, D. |
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Afiliação: |
ANA PAULA GUISSO NAVARINI, UFRGS; MARIA TERESA SCHIFINO-WITTMANN, UFRGS; INGRID BERGMAN INCHAUSTI DE BARROS, UFRGS; DANIELLE ALMEIDA, UFRGS. |
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Título: |
Cytogenetics of Hypericum caprifoliatum Cham. & Schltdl. (Clusiaceae) populations and other species of the genus. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Londrina, v. 8, n. 4, p. 330-338, Dec. 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
Chromosome numbers and meiotic behavior are presented for the first time for Hypericum caprifoliatum (2n=48), H. cf carinatum (2n=48) and H. polyanthemum (2n= 32) and confirmed the H. perforatum (2n=32) number. Chromosomes are very small (ca. 1 to 2 mm). Meiotic irregularities, such as uni and multivalents, un-oriented chromosomes, bridges and laggards were very frequent in H. caprifoliatum and H. cf carinatum. Meiotic indexes ranged from 44.0 to 73.0% in H. caprifoliatum, 66.0 to 77.0% in H. cf carinatum and was 80.0% for the H. polyanthemum population. Pollen fertility ranged from 42.0 to 88.0% in H. caprifoliatum, 65.0 to 88.0% in H. cf carinatum and was 89.0% for H. polyanthemum. Together with literature and meiotic behavior data, the great variability in pollen size and fertility within and among populations of H. caprifoliatum and H. cf carinatum could suggest that, as many other Hypericum species, these taxa are apomictic. |
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Palavras-Chave: |
Comportamento meiótico; Fertilidade do pólen; Número cromossômico. |
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Thesagro: |
Agricultura; Apomixia; Biotecnologia; Citogenética; Genética. |
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Thesaurus Nal: |
Hypericum. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01756naa a2200265 a 4500
001 1049193
005 2010-11-30
008 2008 bl uuuu u00u1 u #d
100 1 $aNAVARINI, A. P. G.
245 $aCytogenetics of Hypericum caprifoliatum Cham. & Schltdl. (Clusiaceae) populations and other species of the genus.
260 $c2008
520 $aChromosome numbers and meiotic behavior are presented for the first time for Hypericum caprifoliatum (2n=48), H. cf carinatum (2n=48) and H. polyanthemum (2n= 32) and confirmed the H. perforatum (2n=32) number. Chromosomes are very small (ca. 1 to 2 mm). Meiotic irregularities, such as uni and multivalents, un-oriented chromosomes, bridges and laggards were very frequent in H. caprifoliatum and H. cf carinatum. Meiotic indexes ranged from 44.0 to 73.0% in H. caprifoliatum, 66.0 to 77.0% in H. cf carinatum and was 80.0% for the H. polyanthemum population. Pollen fertility ranged from 42.0 to 88.0% in H. caprifoliatum, 65.0 to 88.0% in H. cf carinatum and was 89.0% for H. polyanthemum. Together with literature and meiotic behavior data, the great variability in pollen size and fertility within and among populations of H. caprifoliatum and H. cf carinatum could suggest that, as many other Hypericum species, these taxa are apomictic.
650 $aHypericum
650 $aAgricultura
650 $aApomixia
650 $aBiotecnologia
650 $aCitogenética
650 $aGenética
653 $aComportamento meiótico
653 $aFertilidade do pólen
653 $aNúmero cromossômico
700 1 $aSCHIFINO-WITTMANN, M. T.
700 1 $aBARROS, I. B. I. de
700 1 $aALMEIDA, D.
773 $tCrop Breeding and Applied Biotechnology, Londrina$gv. 8, n. 4, p. 330-338, Dec. 2008.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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| 4. |  | MAUCH, C. R.; BARROS, I. B. I. de; VIEIRA, J. V.; COSTA, C. Correlacoes genotipica, fenotipica e de ambiente entre caracteres de raiz e parte aerea de progenies de meio-irmaos de cenoura. Horticultura Brasileira, Brasilia, v.11, n.1, p.83, maio 1993. Resumo.| Biblioteca(s): Embrapa Hortaliças. |
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| 5. | | LAUX, L. C.; BÜTTENBENDER, D.; PETRY, H. B.; GONZATTO, M. P.; OLIVEIRA, R. P. de; SCIVITTARO, W. B.; BARROS, I. B. I. de. Citricultura biodinâmica: princípios e insumos para nutrição de plantas. Pelotas: Embrapa Clima Temperado, 2013. 34 p. (Embrapa Clima Temperado, Documentos, 380.)| Biblioteca(s): Embrapa Clima Temperado. |
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