The effect of homoeologous group 3 chromosomes on chromosome pairing and crossability in Triticum aestivum

Abstract

Differences in the level of chromosome pairing in hybrids between ''Chinese Spring'' wheat homeologous group 3 aneuploids and rye and in homeologous group 3 aneuhaploids were studied. Factors affecting chromosome pairing were detected or confirmed on both arms of the chromosomes of homeologous group 3 in wheat. Effects were also identified on chromosome 3R of rye and a chromosome of Hordeum bulbosum. Factors affecting crossability between ''Chinese Spring'' wheat and H. bulbosum were also found on chromosomes 3A, 3B, and 3D. A correlation was shown between increased pairing and reduced crossability.