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Titolo:
Comparisons of recombination frequencies in hybrids involving telocentric and bibrachial wheat chromosomes
Autore:
Dubcovsky, J; Tranquilli, G; Khan, IA; Pfluger, LA; Suarez, E; Rousset, M; Dvorak, J;
Indirizzi:
Univ Calif Davis, Dept Agron & Range Sci, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 gron & Range Sci, Davis, CA 95616 USA INTA, CIRN, IRB, RA-1712 Castelar, Buenos Aires, Argentina INTA Castelar Buenos Aires Argentina RA-1712 lar, Buenos Aires, Argentina INRA, Lab Genet & Ameliorat Plantes, F-80200 Estrees Mons, France INRA Estrees Mons France F-80200 t Plantes, F-80200 Estrees Mons, France
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 2, volume: 100, anno: 2000,
pagine: 308 - 314
SICI:
0040-5752(200001)100:2<308:CORFIH>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEOTIDE-SEQUENCES; TRITICUM-MONOCOCCUM; RIBOSOMAL-RNA; DIFFERENTIATION; PROTEIN; GENOME; LOCUS; MAPS;
Keywords:
Triticum aestivum; recombination; centromeric region; telosomes; gametic selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Dubcovsky, J Univ Calif Davis, Dept Agron & Range Sci, 1 Shields Ave, Davis, CA 95616 USA Univ Calif Davis 1 Shields Ave Davis CA USA 95616 A 95616 USA
Citazione:
J. Dubcovsky et al., "Comparisons of recombination frequencies in hybrids involving telocentric and bibrachial wheat chromosomes", THEOR A GEN, 100(2), 2000, pp. 308-314

Abstract

Telosomic stocks have been extensively used to map genes to chromosome arms and to determine gene-to-centromere genetic distances. It has been suggested that if a chromosome arm is present as a telosome, recombination frequencies will be drastically reduced in the centromeric region. However, previous studies have not considered the bias in recombination estimates due to selection against aneuploid gametes produced by failure of pairing at the first meiotic division. Formulas are derived here for adjusting recombination estimates for this bias. Adjusted recombination frequencies between markers located on both sides of the centomeres are analyzed in three different pairs of wheat (Triticum aestivum) isogenic segregating populations involving bibrachial and telocentric chromosomes. Recombination frequencies estimated from crosses involving telocentric chromosomes were not significantly different from recombination frequencies estimated from isogenic crosses involving bibrachial chromosomes. The implications of the present findings forkaryotype evolution, and specifically for Robertsonian fissions and fusions, are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 16:44:05