Molecular cloning and characterization of an unusually large intergenic spacer from the Nor-B2 locus of hexaploid wheat.
Genome
; 39(2): 288-92, 1996 Apr.
Article
em En
| MEDLINE
| ID: mdl-8984003
ABSTRACT
An allelic rDNA variant from the Nor-B2 locus of 'Bezostaya' wheat that forms an especially active nucleolus was cloned and characterized. It carries an unusually large intergenic spacer compared with rDNA units in most other wheat genotypes. The additional intergenic length is in the array of 135-bp A repeats and not in other internal repeats. These A repeats have sequences nearly identical to other A repeats described for other alleles. It is suggested therefore that the more active Nor-B2 locus of 'Bezostaya' may be due to the constituent rDNA units possessing a larger array of A repeats.
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Bases de dados:
MEDLINE
Assunto principal:
Triticum
/
DNA Ribossômico
/
DNA de Plantas
Idioma:
En
Revista:
Genome
Assunto da revista:
GENETICA
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Reino Unido