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Information × Registration Number 0206U005197, 0104U004413 , R & D reports Title To develop a theoretically grounded and mathematically simulated scheme of selection work on the silkworm; to breed and introduce, based thereon, productive races and hybrids having the complex of predetermined qualities popup.stage_title Head Galanova Oksana Viktorovna, Registration Date 06-03-2006 Organization Sericultural institute Ukrainian academy of agrarian sciences popup.description2 The purpose of work- to create highly technological breeds of a silkworm which will provide the set limits at hybridization: viability of 94-95 %, shall ratio of frash cocoons of 24-25 %, filament length of 100-1500 m. Methods of research is individual and mass selections, synthetic selection, statistical data processing. The circuits of selection work have been crater with a silkworm which basic stages are is developed: research of an initial material, creation of hypothetical model of future breed, a choice of the circuit of selection on the basis of application of selection indexes, selection work on breed creating, all-round studying of its attributes and combinational ability, Test of the best hybrid combinations. It is created four new hybrids of silkworm Uкrainskaja 20х Uкrainskaja 19, Uкrainskaja 19х Uкrainskaja 20, Uкrainskaja 21хМеrefa.8, Меrefa 8х Uкrainskaja 21 which have successfully passed the State test (2001-2002 years) and are introduced into production. Settlement economic efficiency of hybrids on a yield of raw silk makes 65,6-149,1 grn. from one box of caterpillars (17,5 g). Selection work from created new breeds Silk 1, Silk 2, Uкrainskaja 22, Uкrainskaja 23 is finished. Highly technological lines of breeds Uкrainskaja 22, line ІІ and Uкrainskaja 23 line ІІ are created. The initial material is investigated on the basis of three synthetic populations of silkworm T1, Т2, D1 for selection work. It is lead six generations of selection of highly productive individuals of a silkworm and two sating crossings. It is established and experimentally proved cyclic character of variability of a parameter of viability of caterpillars and the long-term forecast of viability of breeds of a silkworm is developed. Research of breeds, imported from Egypt and China have been leaded and created on their basis new highly productive hybrids for needs Ukraine sericulture. Silkworm, breed, hybrid, viability, efficiency, test of hybrids.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close