Abstract
One way to promote chromosome pairing between wheat and alien genomes is by using chromosome 5B deficient-genetic stocks (monosomic 5B) as female parents in hybridization. Such a stock is available in the cultivar Chinese Spring that has superior crossability but is a poor agronomic wheat. We have developed monosomic 5B stocks in three elite bread wheat cultivars (Ciano 79, Nacozari 75, Pavon 76) using Chinese Spring as the monosomic 5B donor source through a backcrossing protocol. The three new monosomic 5B stocks produced were validated by C-banding and by meiotic analyses of the 5B deficient F1 hybrids (2n=5x=34) of each cultivar with Aegilops variabilis.
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