Agro Inform reproductive and viability characteristics of
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2-son 16.01-61-67
2/ 2021
65 Agro Inform Table-2 Reproductive traits in C-8 ngl breed and the F 2 generation obtained in the improvement of C-8 ngl breed Number of stocks analyzed, pcs Number of eggs in stock, ±S x , pcs Weight of eggs in stock, ±S x , mg Physiological defect, ±S x , % С-8 ngl (control) 95 700±5,90 417±0,75 1,81±0,78 Improving ♀(С-8 ngl×L-28) × ♂(L-28×С-8 ngl) F 2 33 673±14,59 383±8,93 2,2±0,30 Crossbreeding under analysis♀(tr24w 2 w 2 ×L-67) × ♂(L-28×С-8 ngl) 18 658±24,71 411±14,92 1,3±0,20 Based on the given table, we can say that ♀ (C-8 ngl × L-28) × ♂ (L-28 × C-8 ngl) prepared for improvement didn’t differ from control breed C-8 ngl by the number of eggs (673 pieces), the weight of the eggs (383 mg) in the egg-laying (700 pieces and 417 mg, respectively). The reliability of the difference is Pd = 0.786- 0.999. The weight of the eggs (411 mg) and physiological defect (1.3%) in the ♀ (tr24w 2 w 2 × L-67) × ♂ (L-28×C-8 ngl) egg-laying created as a result of the analytical cross were at the level of the control C-8 ngl breed. Embryonic and postembryonic viability traits of silkworm breeds and hybrids are important in their evaluation on an industrial scale or in laboratory conditions. Because, iflarge- cocoon silkworms have the required technological and productivity indicators, and if some lethal and sublethal genes are involved in their genotype, their eggs can hatch and make healthycocooning,get stable at different stages of ontogeny until the next life cycle. Considering all these, worm hatching was studied in the background of lethal genes of parental and F 1 and F 2 generation. The results obtained are reflected in Tables 3 and 4. Download 0.95 Mb. Do'stlaringiz bilan baham: |
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