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Three diploid taxa – Hieracium transylvanicum (subgenus Hieracium), Hieracium caespitosum subsp. brevipilum and Hieracium pavichii (subgenus Pilosella) – from five natural Bulgarian populations were investigated embryologically. The peculiarities of the male and female gametophytes, embryo- and endospermogenesis were established in each species. The results suggest that the species propagate sexually...
Summary The androgenic ability of four Medicago sativa L. genotype (Boynitza 5, Byala, 494, and 3815) was tested. Callus and organogenesis were induced in all lines studied. The percentage of anthers producing calluses and organogenesis showed wide variation (calluses—from 11% up to 77%; organogenesis—4.8% to 15.2%). It has been established that genotype, nutrient medium composition, and stage of...
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