Introgression of Aegilops triuncialis into Triticum aestivum. A progress report.

Resumen

A. Delibes, I. López-Braña, M. Mena y F. García-Olmedo. 1988. Introgression of Aegüops triuncialis into Triticum aestivum. A progress report. An. Aula Dei 19 (1-2): 189-194. The wild grass Aegüops triuncialis (genomes CCUU) has been crossed with the tetraploid wheat Triticum turgidum (AABB) and the resulting ABCU sterile hybrid has been rescued with pollen from the hexaploid T. aestivum (AABBDD). Seven spikes from two hybrid plants were pollinated with pollen from T. aestivum cv. Almatense and 8 kernels were obtained. After five rounds of selfing, plants with 28 to 41 chromosomes have been derived. Low fertility (3-5 viable kernels per plant) was observed throughout the process. Further crosses to T. aestivum will be performed to obtain stable lines that will be screened for Ae. triuncialis genetic material with the aid of previously identified biochemical chromosome markers and specially developed DNA probes.