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Titolo:
The activity of nucleolar organizing chromosomes in multigeneric F-1 hybrids involving wheat, triticale, and tritordeum
Autore:
Lima-Brito, J; Guedes-Pinto, H; Heslop-Harrison, JS;
Indirizzi:
Univ,Tras Os Montes & Alto Douro, Dept Genet & Biotechnol, P-5000 Vila Real Univ Tras Os Montes & Alto Douro Vila Real Portugal P-5000 000 Vila Real Johnandnes Ctr Plant Sci Res, Karyobiol Grp, Norwich NR4 7UH, Norfolk, Engl John Innes Ctr Plant Sci Res Norwich Norfolk England NR4 7UH orfolk, Engl
Titolo Testata:
GENOME
fascicolo: 6, volume: 41, anno: 1998,
pagine: 763 - 768
SICI:
0831-2796(199812)41:6<763:TAONOC>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
X RYE HYBRIDS; SECALE-CEREALE; ADDITION LINES; MORPHOLOGY; CYTOLOGY;
Keywords:
silver staining; rDNA; nucleolar dominance; interspecific hybrids; Triticum aestivum; Triticum durum; Hordeum chilense; triticale; tritordeum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Guedes-Pinto, H Univ,Tras Os Montes & Alto Douro, Dept Genet & Biotechnol,P-5000 Vila Real Univ Tras Os Montes & Alto Douro Vila Real Portugal P-5000
Citazione:
J. Lima-Brito et al., "The activity of nucleolar organizing chromosomes in multigeneric F-1 hybrids involving wheat, triticale, and tritordeum", GENOME, 41(6), 1998, pp. 763-768

Abstract

The nucleolar activity in interspecific hybrids between tritordeum, wheat,and triticale was studied using the silver salt - nylon technique. rRNA genes from the major NORs from wheat (chromosome pairs 1B and 6B) and Hordeumchilense (chromosome pairs 5H(ch) and 6H(ch)) were active in genomic constitutions AABBH(ch)H(ch), AABBH(ch), and AABBDH(ch). The rye chromosome 1R NOR suppression found in triticale and in wheat x rye F-1 hybrids is also observed in trigeneric hybrids, genome constitution AABBRH(ch), derived from crosses between triticale and tritordeum. As expected, the maximum number of NORs per metaphase cell is coincident with the maximum number of nucleoliper interphase cell. Occasional extra nucleolar activity was observed, probably owing to minor sites of wheat NORs, since no other sites of active orinactive rRNA genes were detected in H. chilense. However, it is notable that the two H. chilense loci and two major rDNA loci of wheat origin are expressed together.

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Documento generato il 29/11/20 alle ore 10:36:30