Variability of Quantitative Traits in Different Stevia Stevia rebaudiana B. Origins | ИЗМЕНЧИВОСТ НА КОЛИЧЕСТВЕНИ ПРИЗНАЦИ ПРИ РАЗЛИЧНИ ПРОИЗХОДИ СТЕВИЯ Stevia rebaudiana B.
2012
Uchkunova, K., Agricultural Institute, Shumen (Bulgaria) | Uchkunov, I., Agricultural Institute, Shumen (Bulgaria) | Kikindonov, Ts., Agricultural Institute, Shumen (Bulgaria) | Kikindonov, G., Agricultural Institute, Shumen (Bulgaria)
The white sugar consumption in our country is one of the highest in Europe – 31.5 kg per inhabitant. In Japan, for instance the consumption is 21.8 kg. The lower white sugar use there is due to the increased use of other sweeteners, basically stevia. The stevia plant as a source of natural sweeteners was subject of researches in the 80 years of the last century in the former Sugar beet Institute, where the studies were directed to creating methods of cultivation and propagation in the conditions of our country. The results of our current study show that the tested genotypes reach 50 – 60 cm height of the bushes. Approximately 6% of the breeding materials bloom and go to seeds, and approximately the same is the percentage of plant damaged by the fungal disease alternaria. Five origins were assessed for quantity of raw mass, fresh leaves, dry leaves, and dry mass output. The plants were grown by planting at 50/30 cm in irrigation conditions, on carbonate black soil. Statistically proved differences were estimated in fresh mass weight and in dry leaves quantities for the different genotypes. The average quantity of dry leaves from a single plant reaches 31.6 g. The theoretical yield of dry leaves is 123.3 kg/da.
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