Abstract
Nine Triticum durum — T. monococcum amphiploids (AABBAmAm) were synthesized by chromosome doubling of sterile triploid F1 hybrids involving nine T. durum (AABB) cultivars and a T. monococcum (AmAm) line. The triploid F1 hybrids had a range of 4–7 bivalents and 7–13 univalents per PMC. The synthetic amphiploids, however, showed a high degree of preferential pairing of chromosomes of the A genomes of diploid and tetraploid wheats. The amphiploids were meiotically stable and fully fertile. Superiority of four amphiploids for tiller number per plant, 100-grain weight, protein content and resistance to Karnal bunt demonstrated that these could either be commercially exploited as such after overcoming certain inherent defects or used to introgress desirable genes into durum and bread wheat cultivars. Methods for improvement of these amphiploids are discussed.
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