Evaluation of Reproductive and Growth Performance in New Breeds and Hybrids of Bivoltine Silkworm  (Bombyx mori L.)

Thrilekha, D; Manjunatha Gowda; Pradip G.D; P. Harshita Mala; Chethankumar D.S; J. Seetharamulu

doi:10.9734/jabb/2024/v27i6879

Research Article Open access CC BY 4.0

Evaluation of Reproductive and Growth Performance in New Breeds and Hybrids of Bivoltine Silkworm (Bombyx mori L.)

Thrilekha, D, Manjunatha Gowda, Pradip G.D, P. Harshita Mala, Chethankumar D.S, J. Seetharamulu

Journal of Advances in Biology & Biotechnology · pp. 199–208 · Published 9 May 2024

10.9734/jabb/2024/v27i6879

Abstract

This study aimed to evaluate the reproductive and growth performance of recently developed bivoltine silkworm parental breeds and their hybrids to improve silk production and ensure the long-term sustainability of sericulture. Utilizing five thermotolerant pure breeds (B1, B2, B4, B6 and B8) and four popular CSR breeds (CSR2, CSR27, CSR6 and CSR26), six foundation crosses and eight double hybrids were developed and evaluated for ten traits. Results showed that B1 exhibited superior performance in fecundity (524.00), hatching percentage (98.67%), dead eggs (1.33%), pupal weight (1.31 g), pupation rate (96.84%) and cumulative survival index (CSI) (93.84%). The foundation cross B1 × B2 excelled in fecundity (553.67), larval mortality (2.67%), pupal weight (1.53 g), ERR (97.33%) and CSI (93.27%) while FC2 performed better in hatching percentage (97.60%), dead eggs percentage (2.40%), fifth instar larval duration (157.21 h), fifth instar larval weight (35.64 g/10 larvae) and pupation rate (96.33%). Among the double hybrids, (B1 × B2) × (FC1) demonstrated superior performance in fecundity (614.33), larval mortality (1.41%), pupal weight (2.06 g), ERR (98.59%) and CSI (97.24%). FC2 × FC1 excelled in larval duration (141.11 h), fifth instar larval weight (51.96 g/10 larvae) and pupation rate (98.94%). Double hybrids showed significant improvements compared to parental breeds and foundation crosses, indicating potential for field testing and further development. These results indicate the potential of using the newly identified breeds and foundation crosses in silkworm breeding, particularly in developing new double hybrids as an alternative to established CSR breeds and hybrids.

Bombyx mori double hybrids foundation crosses parental breeds reproductive performance silkworm

References (9)

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Evaluation of New Bivoltine Silk Worm Double Hybrids Tolerant to High Temperature and Muscardine Disease in Eastern Dry Zone of Karnataka

Nikita Kankanawadi, Manjunath Gowda, K C Narayanaswamy · Indian Journal of Entomology · 2025

Showing 1 of 3 known citations — external sources report more than can currently be individually listed.

The Role of Probiotic Supplementation in Silkworm (Bombyx mori) Biology: Current Insights and Future Perspectives — shares topic coverage
Inter Simple Sequence Repeat (ISSR) Markers for Assessment of Genetic Polymorphism and Phylogenetic Relationships of the Silkworm Bombyx mori L. — shares topic coverage
Alterations Due to Heat Shock in Biological and Commercial Features of the Silkworm, Bombyx mori — shares topic coverage
Rearing Performance of Some Popular Bivoltine Silkworm (Bombyx mori L.) Breeds during Spring Season — shares topic coverage
Seasonal Rearing Performance of Multivoltine Pure Mysore Silkworm in Southern dry Zone of Karnataka, India — shares topic coverage

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Thrilekha, D, Manjunatha Gowda, Pradip G.D, P. Harshita Mala, Chethankumar D.S, J. Seetharamulu (2024). Evaluation of Reproductive and Growth Performance in New Breeds and Hybrids of Bivoltine Silkworm (Bombyx mori L.). Journal of Advances in Biology & Biotechnology , 199–208. https://doi.org/10.9734/jabb/2024/v27i6879

Affiliations

Thrilekha, D — Department of Sericulture, College of Agriculture, UAS, GKVK, Bengaluru – 560065, India.
Manjunatha Gowda — Department of Sericulture, College of Agriculture, UAS, GKVK, Bengaluru – 560065, India.
Pradip G.D — Department of Sericulture, College of Agriculture, UAS, GKVK, Bengaluru – 560065, India.
P. Harshita Mala — Department of Sericulture, College of Agriculture, UAS, GKVK, Bengaluru – 560065, India.
Chethankumar D.S — Department of Sericulture, College of Agriculture, UAS, GKVK, Bengaluru – 560065, India.
J. Seetharamulu — APPSRDI, Hindupur, India.

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