The production of a 5B-5R chromosome translocation for induction of homoeologous meiotic pairing in wheat

Abstract

A wheat line heterozygous for a translocation between the short arm of wheat chromosome 5B and the long arm of rye chromosome 5R was isolated. The rye segment carries the gene Hp, which gives the plants hairy peduncles. The rye segment does not carry the homoeologous pairing suppressor gene Ph 1 of the long arm of the 5B chromosome of wheat. This makes the translocation line very useful for the induction of homoeologous chromosome pairing between alien chromosomes and wheat chromosomes in interspecific and intergeneric hybrids. Such hybrids with this translocation line will be of two kinds: with or without the Hp gene. The former lack the Phi gene and should have homoeologous chromosome pairing in meiosis. The production of the translocation line is described.