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Registros recuperados : 303 | |
Registros recuperados : 303 | |
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Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
26/03/2002 |
Data da última atualização: |
10/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
MELO, N. F. de; GUERRA, M. |
Afiliação: |
NATONIEL FRANKLIN DE MELO, CPATSA. |
Título: |
Karyotypic stability in asparagus (Asparagus officinalis L.) cultivars revealed by rDNA in situ Hybridization. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
Cytologia, Tokyo, v. 66, p. 127-131, 2001. |
Idioma: |
Inglês |
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, |
Palavras-Chave: |
DNAr; Genetic; Genotypes; rDNA; Variabilidade. |
Thesagro: |
Asparagus Officinalis; Aspargo; Cruzamento; Genética; Genótipo; Hibridação; Variedade. |
Thesaurus NAL: |
hybridization; variability; varieties. |
Categoria do assunto: |
G Melhoramento Genético |
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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Embrapa Semiárido (CPATSA) |
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