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| Registros recuperados : 303 | |
| Registros recuperados : 303 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
26/03/2002 |
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Data da última atualização: |
10/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
MELO, N. F. de; GUERRA, M. |
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Afiliação: |
NATONIEL FRANKLIN DE MELO, CPATSA. |
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Título: |
Karyotypic stability in asparagus (Asparagus officinalis L.) cultivars revealed by rDNA in situ Hybridization. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Cytologia, Tokyo, v. 66, p. 127-131, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
Four asparagus cultivars were cytologically studied by conventional staining and in situ hybridization, in order to evaluate both the variability among cultivars and the distribution pattern of 18S-25S rRNA genes. lhe mitotic and meiotic analysis with conventional chromosome staining did not show heteromorphisms or differences between cultivars. In situ hybridization with 18S and 25S rONA probes showed 6 chromosomes with 18S-25S rONA sites in the 4 studied genotypes. lhe New Jersey, Waltam Washington and G4X 14 cultivars presented 4 chromosomes with larger subterminal sites and 2 with interstitial sites of smaller size. In the Oeco cultivar, heteromorphism was verified in the size of the rONA sites, which were larger and subterminal in 3 chromosomes, and small
and interstitial in 3 other chromosomes. lhe results suggest that asparagus cultivars may present only small differences in the number and distribution of rONA loci, |
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Palavras-Chave: |
DNAr; Genetic; Genotypes; rDNA; Variabilidade. |
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Thesagro: |
Asparagus Officinalis; Aspargo; Cruzamento; Genética; Genótipo; Hibridação; Variedade. |
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Thesaurus NAL: |
hybridization; variability; varieties. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/176601/1/Separata-9484.pdf
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Marc: |
LEADER 01743naa a2200313 a 4500
001 1134506
005 2018-05-10
008 2001 bl --- 0-- u #d
100 1 $aMELO, N. F. de
245 $aKaryotypic stability in asparagus (Asparagus officinalis L.) cultivars revealed by rDNA in situ Hybridization.
260 $c2001
520 $aFour asparagus cultivars were cytologically studied by conventional staining and in situ hybridization, in order to evaluate both the variability among cultivars and the distribution pattern of 18S-25S rRNA genes. lhe mitotic and meiotic analysis with conventional chromosome staining did not show heteromorphisms or differences between cultivars. In situ hybridization with 18S and 25S rONA probes showed 6 chromosomes with 18S-25S rONA sites in the 4 studied genotypes. lhe New Jersey, Waltam Washington and G4X 14 cultivars presented 4 chromosomes with larger subterminal sites and 2 with interstitial sites of smaller size. In the Oeco cultivar, heteromorphism was verified in the size of the rONA sites, which were larger and subterminal in 3 chromosomes, and small and interstitial in 3 other chromosomes. lhe results suggest that asparagus cultivars may present only small differences in the number and distribution of rONA loci,
650 $ahybridization
650 $avariability
650 $avarieties
650 $aAsparagus Officinalis
650 $aAspargo
650 $aCruzamento
650 $aGenética
650 $aGenótipo
650 $aHibridação
650 $aVariedade
653 $aDNAr
653 $aGenetic
653 $aGenotypes
653 $arDNA
653 $aVariabilidade
700 1 $aGUERRA, M.
773 $tCytologia, Tokyo$gv. 66, p. 127-131, 2001.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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