Genetic regulation of diploid-like chromosome pairing in Avena.

The genetic control of diploid-like chromosome pairing in Avena is discussed and compared with the diploidizing mechanisms in the hexaploid breadwheat and the hexaploid tall fescue. An examination of the published literature reveals that there is a remarkable similarity in these three regulatory mechanisms (Table 3). It is further concluded that the diploidizing gene system in the polyploid species of Avena is as complex as in wheat. A reappraisal of the published information on Avena and other polyploids, followed by further studies, might yield more information about the functional aspects of the diploidizing mechanisms.