BIOLOGICAL AND TECHNOLOGICAL CHARACTERISTICS OF INDUSTRIAL SILKWORM HYBRIDS DEVELOPED ON THE BASIS OF PARTHENOGENETIC CLONE-LINE BREEDS
DOI:
https://doi.org/10.5281/Keywords:
silkworm, Bombyx mori L., parthenogenetic clone, industrial hybrid, biological productivity, silk ratio, cocoon shell weight, metric number, filament length, heterosis.Abstract
This study evaluated the biological productivity and technological quality characteristics of industrial silkworm hybrids developed on the basis of parthenogenetic clone-line breeds. The reciprocal hybrids U-1 × U-2 and U-2 × U-1 were investigated during 2021–2026 and compared with the standard hybrid Ipakchi-1 × Ipakchi-2. The results demonstrated that the U-2 × U-1 hybrid exhibited superior biological performance, including larval viability (94.6±1.18%), cocoon weight (1.80±0.06 g), cocoon shell weight (426.2±15.8 mg), and silk ratio (24.0±0.42%), exceeding the control hybrid. Regarding technological traits, the U-1 × U-2 hybrid showed higher dry cocoon weight (0.766±0.03 g), silk yield (50.1±1.2%), and reelable filament length (1183±76 m), whereas the U-2 × U-1 hybrid achieved the highest metric number (3704±128 m) and total cocoon filament length (1270±71 m). The obtained results indicate a pronounced heterosis effect in hybrids derived from parthenogenetic clone-line breeds for both biological and technological traits. The findings confirm the breeding value of these genetic resources and demonstrate that the U-2 × U-1 hybrid is a promising commercial hybrid for modern sericulture.
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