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Academic Research Journal of
Agricultural Science and Research |
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Academic Research Journal of Agricultural Science and Research Vol. 6(2), pp. 62-69. February, 2018. ISSN: 2360-7874 DOI: 10.14662/ARJASRD2017.065 Full Length Research Evaluation of multivoltine x bivoltine hybrids of mulberry silkworm, Bombyxmori L. tolerant to disease and high yielder at various generations for end users
Ahmed Ibrahim, Abiy Tilahun, Metasebia Terefe and Kedir Shifa
Ethiopian Institute of Agricultural Research, Melkassa Research Center, P.O.Box-436, Melkassa
Accepted 20 September 2017
The trial was conducted at Melkassa research center in the sericulture research laboratory. Four bivoltine and one polyvoltine silkworm were involved in the crossing experiment and laid out in complete randomized design with four replications. Data was collected on fecundity, pupation rate (%), number of diseased larvae, survival rate (%), cocoon weight (g), cocoon shell weight (g), cocoon shell ratio (%) and filament length (m). Uniform and non-significant numbers of eggs produced by adults and cocooning percentages were recorded for both hybrid and parents in all generations. Average larval weight significantly (P<0.01) lower for F1, F2, F3 and F4 generations hybrids than parents but higher in F5, F6 and F7 generations hybrids. Silk ratios and survival rates significantly (P<0.01) higher for all hybrids than parent bivoltine in all hybrid generations. Larval period significantly (P<0.01) lower in F5, F6 and F7 generations hybrid than parent bivoltines. Filament length significantly (P<0.01) lower in F1, F2, F3 and F4 generations hybrids than parent bivoltine but significantly higher in F5, F6 and F7 generations hybrids than parent bivoltines. It can be concluding that instead of using parent polyvoltine and bivoltine mulberry silkworms separately for silk production; the farmers can use F5 and above generations hybrids of multivoltine x bivoltine for relatively higher diseases resistant and maximum silk productions.
Key: Polyvoltine silkworm, bivoltine silkworm, hybrids
How to cite this article: Ibrahim A, Tilahun A, Terefe M, Shifa K (2018). Evaluation of multivoltine x bivoltine hybrids of mulberry silkworm, Bombyxmori L. tolerant to disease and high yielder at various generations for end users. Acad. Res. J. Agri. Sci. Res. 6(2): 62-69
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