E. Sanchez-MONGE
Estacion Experimental de Aula Dei, Zaragoza, Spain
Triticale-type with 42 chromosomes have been obtained at the Aula Dei Station from the hybrids Triticum durum x Secale cereale,T. dicoccum x S. cereale and T. dicoccoides x S. cereale.
The fertility1) of such types has been studied in comparsion with the wheat ancestors and with several 56-chromosome Triticale-types kindly supplied by Prof. Muntzing of Lund's University (types A, C, C x A, O, C x Standard and Svea x Rag) and Prof. Jorgensen of Copenhague University (fype Pajbjirg Ideal x Petkus). The results are summarized in the following table.
These results seem to indicate that, at least under Spanish conditions, the 42-chromosome Triticale compares favourably in fertility with the 56-chromosome ones. Some plants have fertilities approaching that of the wheat ancestor.