Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/134506
Research center of Embrapa/Collection: Embrapa Semiárido - Artigo em periódico indexado (ALICE)
Date Issued: 2001
Type of Material: Artigo em periódico indexado (ALICE)
Authors: MELO, N. F. de
GUERRA, M.
Additional Information: NATONIEL FRANKLIN DE MELO, CPATSA.
Title: Karyotypic stability in asparagus (Asparagus officinalis L.) cultivars revealed by rDNA in situ Hybridization.
Publisher: Cytologia, Tokyo, v. 66, p. 127-131, 2001.
Language: en
Keywords: Variabilidade
DNAr
Genetic
Genotypes
rDNA
Description: 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,
Thesagro: Asparagus Officinalis
Aspargo
Cruzamento
Genética
Genótipo
Hibridação
Variedade
NAL Thesaurus: hybridization
variability
varieties
Data Created: 2002-03-26
Appears in Collections:Artigo em periódico indexado (CPATSA)

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