Chromosome rearrangements in the hexaploid oats

Abstract

Different lines of hexaploid oats (A. sterilis-A. sativa group) were found to differ from each other by chromosome rearrangements. Five hybrid combinations between A. sterilis lines and one sterilisbyzantina combination were examined. All hybrids showed formation of 1-2 quadrivalents indicating translocation differences between lines. These chromosomal differences did not affect the fertility of the hybrids, nor reproductively isolate the various forms. It is proposed that chromosomal variation is an integral part of the genetic system of polyploid oats and one of the means enabling rapid evolution in the group of weeds and cultivated cereals. © 1970 The Genetical Society of Great Britain.