|
|
Registros recuperados : 15 | |
Registros recuperados : 15 | |
|
|
Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
20/07/2011 |
Data da última atualização: |
18/11/2011 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
FELIX, W. J. P.; FELIX, L. P.; MELO, N. F. de; OLIVEIRA, M. B. M.; DUTILH, J. H. A.; CARVALHO, R. |
Afiliação: |
W. J. P. FELIX, Mestrando da UFRPE; L. P. FELIX, UFPB; NATONIEL FRANKLIN DE MELO, CPATSA; M. B. M. OLIVEIRA, UFPE; J. H. A. DUTILH, UNICAMP; R. CARVALHO, UFRPE. |
Título: |
Karyotype variability in species of the genus Zephyranthes Herb. (Amaryllidaceae-Hippeastreae). |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Plant Systematics and Evolution, New York, v. 294, p. 263-271, 2011. |
DOI: |
10.1007/s00606-011-0467-6 |
Idioma: |
Português |
Conteúdo: |
Abstract In this work, the cytotaxonomic implications of the chromosomal characterization of cultivated and native Zephyranthes species described in northeastern Brazil were studied. All individuals had karyotype formed by a set of metacentric chromosomes, in addition to submetacentric and acrocentric chromosomes. In Zephyranthes robusta, 2n = 12 was observed and karyotype with formula 4M ? 2SM in somatic cells, representing the most symmetric karyotype among the investigated species. Z. sylvatica showed three different chromosome complement numbers: 2n = 12 with formula 1M ? 5SM, 2n = 12 ? 1B with1M ? 5SM ? (1B), and 2n = 18 formed by cracks. The cultivated species Z. rosea Lindl. presented 2n = 24 with 4M ? 7SM ? 1A, however Z. grandiflora Lindl. showed the same chromosome number with 2M ? 5SM ? 5A. Zephyranthes aff. rosea Lindl. presented 2n = 25 with one small metacentric forming a crack in the fourth metacentric pair. Z. brachyandra has 2n = 24 ? (1B) and formula 4M ? 3SM ? 5A ? (1B). Z. candida Herb. presented 2n = 38 and karyotype formula 9M ? 10SM. In Habranthus itaobinus numerical variation was observed, with the majority of populations showing a chromosome complement composed of 2n = 44 ? 1B with 5M ? 12SM ? 5A ? (1B), or 2n = 44 ? 3B in a single population. Mechanisms involved in the formation of these karyotypes from chromosomal imbalance data are discussed. Taken together, data from this study only partially confirm previous counts for epithets and further enhance the cytological variability data previously reported for the genus. MenosAbstract In this work, the cytotaxonomic implications of the chromosomal characterization of cultivated and native Zephyranthes species described in northeastern Brazil were studied. All individuals had karyotype formed by a set of metacentric chromosomes, in addition to submetacentric and acrocentric chromosomes. In Zephyranthes robusta, 2n = 12 was observed and karyotype with formula 4M ? 2SM in somatic cells, representing the most symmetric karyotype among the investigated species. Z. sylvatica showed three different chromosome complement numbers: 2n = 12 with formula 1M ? 5SM, 2n = 12 ? 1B with1M ? 5SM ? (1B), and 2n = 18 formed by cracks. The cultivated species Z. rosea Lindl. presented 2n = 24 with 4M ? 7SM ? 1A, however Z. grandiflora Lindl. showed the same chromosome number with 2M ? 5SM ? 5A. Zephyranthes aff. rosea Lindl. presented 2n = 25 with one small metacentric forming a crack in the fourth metacentric pair. Z. brachyandra has 2n = 24 ? (1B) and formula 4M ? 3SM ? 5A ? (1B). Z. candida Herb. presented 2n = 38 and karyotype formula 9M ? 10SM. In Habranthus itaobinus numerical variation was observed, with the majority of populations showing a chromosome complement composed of 2n = 44 ? 1B with 5M ? 12SM ? 5A ? (1B), or 2n = 44 ? 3B in a single population. Mechanisms involved in the formation of these karyotypes from chromosomal imbalance data are discussed. Taken together, data from this study only partially confirm previous counts for epithets and further enhan... Mostrar Tudo |
Palavras-Chave: |
Cromossomo; Habranthus itaobinus; Karyotype asymmetry; Lirio-da-caatinga; Melhoramento genético. |
Thesagro: |
Cromossoma. |
Thesaurus NAL: |
Chromosomes; Zephyranthes. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/39757/1/Natoniel-2011.pdf
|
Marc: |
LEADER 02442naa a2200289 a 4500 001 1896456 005 2011-11-18 008 2011 bl uuuu u00u1 u #d 024 7 $a10.1007/s00606-011-0467-6$2DOI 100 1 $aFELIX, W. J. P. 245 $aKaryotype variability in species of the genus Zephyranthes Herb. (Amaryllidaceae-Hippeastreae).$h[electronic resource] 260 $c2011 520 $aAbstract In this work, the cytotaxonomic implications of the chromosomal characterization of cultivated and native Zephyranthes species described in northeastern Brazil were studied. All individuals had karyotype formed by a set of metacentric chromosomes, in addition to submetacentric and acrocentric chromosomes. In Zephyranthes robusta, 2n = 12 was observed and karyotype with formula 4M ? 2SM in somatic cells, representing the most symmetric karyotype among the investigated species. Z. sylvatica showed three different chromosome complement numbers: 2n = 12 with formula 1M ? 5SM, 2n = 12 ? 1B with1M ? 5SM ? (1B), and 2n = 18 formed by cracks. The cultivated species Z. rosea Lindl. presented 2n = 24 with 4M ? 7SM ? 1A, however Z. grandiflora Lindl. showed the same chromosome number with 2M ? 5SM ? 5A. Zephyranthes aff. rosea Lindl. presented 2n = 25 with one small metacentric forming a crack in the fourth metacentric pair. Z. brachyandra has 2n = 24 ? (1B) and formula 4M ? 3SM ? 5A ? (1B). Z. candida Herb. presented 2n = 38 and karyotype formula 9M ? 10SM. In Habranthus itaobinus numerical variation was observed, with the majority of populations showing a chromosome complement composed of 2n = 44 ? 1B with 5M ? 12SM ? 5A ? (1B), or 2n = 44 ? 3B in a single population. Mechanisms involved in the formation of these karyotypes from chromosomal imbalance data are discussed. Taken together, data from this study only partially confirm previous counts for epithets and further enhance the cytological variability data previously reported for the genus. 650 $aChromosomes 650 $aZephyranthes 650 $aCromossoma 653 $aCromossomo 653 $aHabranthus itaobinus 653 $aKaryotype asymmetry 653 $aLirio-da-caatinga 653 $aMelhoramento genético 700 1 $aFELIX, L. P. 700 1 $aMELO, N. F. de 700 1 $aOLIVEIRA, M. B. M. 700 1 $aDUTILH, J. H. A. 700 1 $aCARVALHO, R. 773 $tPlant Systematics and Evolution, New York$gv. 294, p. 263-271, 2011.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Semiárido (CPATSA) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|