Evidence for 'cross-talk' between A and B chromosomes of rye.
Spontaneous DNA insertions from supernumerary B chromosomes (Bs) into the standard A chromosome complement were detected in rye (Secale cereale L.), using fluorescent in situ hybridization (FISH) analysis with the D1100 B-specific sequence probe. The insertions were seen in individuals derived from plants possessing deleted Bs, characterized in this study by not having the B-specific sequences that are normally found at the distal part of the long arm of the standard rye B. This result supports the case for the spontaneous introgression of B-specific DNA into the A chromosome genome, and it indicates that 'cross-talking' between A and B chromosomes may occur in wild populations.
Ribeiro
Teresa
T
Seccão de Genética, Centro de Botânica Aplicada à Agricultura, Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisbon, Portugal.
Pires
Bruno
B
Delgado
Margarida
M
Viegas
Wanda
W
Jones
Neil
N
Morais-Cecílio
Leonor
L
D032461:Chromosomes, Plant / Q000235:genetics*; D015342:DNA Probes; D017404:In Situ Hybridization, Fluorescence; D012434:Secale / Q000235:genetics*; D014178:Translocation, Genetic / Q000235:genetics*
D015342:DNA Probes