关键词: C-带技术, 易位, 小黑麦, 小麦, 易位, C-带技术, 小麦, 小黑麦

Abstract: The BC1,F2 and F3 populations of three octoploid triticale×common wheat hybrids were cytologically analyzed on a plant-by-plant basis using Giemsa C-banding.Am ong 1098 karyotyped hybrid lants,78 wheat/rye and 277 rye/rye translocated chrom osomes were found with the translocation rates from 4.35% to 14.07% (mean 7.10%) for wheat/rye and from 0.48% to 52.78%(mean 25.23%) for rye/rye in different gen erations and populations.The 14 chromosome arms of rye and the A-,B-and D-genome chromosomes of wheat were involved in the wheat/rye translocations.48.57% of th e identified wheat/rye translocations occurred between homoeologous and 51.43% b etween non-homoeologus chromosomes.Some rye chromosome arms were observed more f requently than the others in translocations.The translocations between wheat and rye chromosomes occurred mainly in the early generations.Some plants containing homozygous translocated chromosomes were obtained from the F3 populations.The s tudy indicated that sufficient numbers of wheat/rye translocations can be produc ed for wheat breeding with crossing octoploid triticale and common wheat.

Key words: Triticale, Translocations, C-banding technique, Wheat