Analysis of boil-off loss in the cocoon shells of the silkworm (bombyx mori l.) Bivoltine breeds and their hybrids.

Anil Kumar, M. N. (2018) Analysis of boil-off loss in the cocoon shells of the silkworm (bombyx mori l.) Bivoltine breeds and their hybrids. International Journal of Researches in Biosciences, Agriculture and Technology, 1 (4). pp. 159-168. ISSN 2347-517X

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Abstract

The silkworm, Bombyx mori L has been reared since dawn of human civilization because of commercial use of silk in textile industry. The silk fiber is made up of two distinguished proteins namely: fibroin and sericin. The removal of sericin is known as boil off loss ratio (B.O.R). It is considered as one of the important qualitative trait during the course of silk worm breeding. An attempt has been made in the current investigation to record the cocoon parameters and boil off loss ratio in parental bivoltine breeds viz., CSR2, CSR4, CSR6, CSR16, CSR17, CSR26 and CSR27. and direct cross hybrids viz., CSR2 x CSR4, CSR16 x CSR17, CSR2 x CSR27, CSR6 x CSR26 and FC1x FC2 [(CSR6 x CSR26) x (CSR2 x CSR27)] and reciprocal crosses hybrids viz., CSR4 x CSR2, CSR17 x CSR16, CSR27 x CSR 2, CSR26 x CSR6 and FC2 x FC1 [( CSR2 x CSR27) x (CSR6 x CSR26)]. The result of the study inferred that, the hybrids of direct cross performed well in respect of cocoon weight, shell weight, shell percentage, filament length and denier. The hybrids of direct crosses recorded lowest boil-off loss ratio compared to reciprocal crosses. The hybrids of direct crosses such as CSR2 x CSR4 and CSR16 x CSR17 expressed better heterosis over mid parental value for boil-off loss ratio. Similarly, the hybrid of reciprocal crosses CSR26 x CSR6 expressed heterosis over mid parental value.

Item Type:	Article
Subjects:	B Life Science > Sericulture
Divisions:	Department of > Sericulture Science
Depositing User:	Harisha R uom
Date Deposited:	06 Jan 2020 06:00
Last Modified:	06 Jan 2020 06:00
URI:	http://eprints.uni-mysore.ac.in/id/eprint/10364

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