New results of exploitation the heterosis in tomato in Bulgaria

Results from creation and comparative test of the new hybrid tomato cultivars are presented: Jar and Dar — semi-determinate suitable for early production in plastic hothouses and in the field; Viki, Asja and Lorin — indeterminate suitable for middle-early field production. Jar and Dar excel the standard in earliness and fruit size. Seed production of Dar, Viki and Asja is realized on a male sterile base (ps-2) and genetic morphological marker (ah) that makes easier the flower emasculation, increases the hybrid seeds purity and precipitates their realization the whole year because of exclusion of the necessity of carrying out a ground test. Above mentioned tomato cultivars are recognized for a spread in all regions of Bulgaria.