EVALUATION OF SWITCHGRASS SOURCE MATERIAL PRODUCTIVITY FOR PLANT BREEDING

The scientific research envisages: to study switchgrass varietal specimens according to economically valuable traits as well as to distinguish the most yielding ones, which have a high yield of certified seed in relation to the weather conditions of the vegetation period by HTc (hydrothermal coefficient).The research object is switchgrass varietal specimens (Zoriane, Morozko, Liniia 1307 and cave-in-Rock), biometric indicators, seed yield, and weather conditions.The methods used in the research are general and special: methods of scientific research in agronomy, laboratory-field method -to determine the quantitative indicators of vegetative and generative parts of plants and the weight of 1000 seeds, quantitative-weight methods -to establish crop productivity and yield of certified seed; statistical processing of research results was performed by a dispersion analysis and variation statistics.Research results.Variety Zoriane and Liniia 1307 formed the highest quantitative indicators of the vegetative (height of plants, number of stems and leaves and length of flag leaf) and generative part of plants (length and width of panicle, number of twigs of the first order and number of panicles and weight of seeds from panicle) independently of the cultivation conditions.The impact of biometric (quantitative) indicators of the generative part of plants, in close relation with the weather conditions by HTc during the vegetation period, on the seed productivity, which affect the total crop yield, has been determined according to the research

Hali tarjima qilinmagan