Interspecific hybrids involving the perennial oat species Avena macrostachya

Abstract

The chromosome pairing affinities and some morphological comparisons are described in two hybrids involving the autotetraploid perennial oat species Avena macrostachya, the hexaploid cultivated oat species Avena sativa, and the tetraploid oat Avena murphyi. Chromosome pairing in the hybrids indicates that some homology between the chromosomes of the three species exists, but that it may be masked by the preferential pairing of the chromosomes from the A. macrostachya parent.Key words: Avena, meiosis, hybridization, phylogeny.