Морфологічні та цитологічні ознаки визначення тетраплоїдів стевії медової

摘要: Purpose. Determination of peculiarities anatomical and morphological characters stevia plants to accelerate the identification tetraploid forms. Methods. Field, laboratory analysis-of-variance methods. Results . It was established that larger leaf area index (19–38%), fewer stomata per unit (by 39–48%), diameter pollen grains 42–92%) is a characteristic feature forms as compared diploid ones. Conclusions The parameters plate, size are auxiliary selection criteria (rapid test). For stevia, (the ratio blade length width), truly Chromosomes number determination based on cytological analysis major most accurate criterion for forms, seems advisable use it at later stages selection.