| II. Records Triticale Persenk (2n = 6x = 42) : A new original variety for grain Stoyan TSVETKOV Institute for Wheat and Sunflower, General Toshevo, Bulgaria In the recent years the periodic and extreme droughts in Bulgaria tested seriously not only wheat but also the new cereal crop-Triticale (a wheat - rye hybrid) (TSVETKOV & STEREVA 1986). It is necessary in the breeding of new varieties to take note to their ecological plasticity together with high productive potentialities (TSVETKOV 1982). The insufficient appreciation of the relationship of these two varietal characters could lead to great disappointments in the breeding of some cereal crops and to some unrealized possibilities for the production. At the 42-plenary session of the State Varietal Committee in February 1987 the Triticale Persenk was registered as a original variety and zonated in the whole country. Origin and Botanical Affiliation Triticale variety Persenk is developed at the Wheat and Sunflower Institute "Dobroudja", General Toshevo, Bulgaria in the period 1977 - 1986. It will be used for grain production. It came from the complex cross (AD-durum-form x AD-No. 8) x AD-No. 8. The fifst simple crossing AD-durum-form x AD-No. 8 was conducted in 1977 while the second complex crossing (AD-durum-form x AD-No. 8) x AD-No. 8 in 1978. The mother parent form AD-durum-form is a primary 42-chromosome Triticale by origin (Charkov, USSR), which was distinguished for a very high cold resistance and a good maturing rate (SHULINDIN & NAUMOVA 1965). The father parent form AD-No. 8 (Mapache) is a Mexican Triticale with substituted chromosomes distinguishing for a high fertility of the spike, very good resistance to rusts in the conditions of Bulgaria, a comparatively low stem, whereas its cold resistance is low. It was established that through the breeding method of hybridization and selection in Triticale Persenk were successfully combined the high productive potentialities of the spike taken from the Mexican Triticale AD-No. 8 (Mapache) with the good maturing rate of the spike of the Soviet Triticale AD-durum-form. |
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