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Creative Commons License 2014 Volume 1 Issue 3

On cocoon uniformity in different crosses of bivoltine hybrids of silkworm Bombyx mori L.

Veeranna Gowda, Kalpana G. V., Parthasarathy B. A., Somi Reddy J., Angadi B. S.
Abstract

The variability in cocoon shape is considered as an important parameter for evolving viable bivoltine silkworm hybrids of different crossing pattern and uniformity in cocoon shape helps in achieving improved reelability and uniform denier, the important post-cocoon quality parameters. In the present study, cocoon length, width, lengthwidth ratio, standard deviation and co-efficient of variation was assessed by utilizing the newly developed 21 each of different crosses of bivoltine hybrids (single, three- way and four- way crosses) along with control hybrids namely, (CSR2xCSR4) and [(CSR2xCSR27)x(CSR6xCSR26)]. The data revealed that wide variations in cocoon uniformity were observed among the different crosses of bivoltine hybrids. The study further revealed that the single-cross bivoltine hybrid, (CSR27xCSR26), three-way cross bivoltine hybrids, [(JPN8xCSR17)xD13] and [(D13xCSR26)xCSR17] and four-way cross hybrids [(JPN8xCSR17)x(D13xS9)] have recorded more cocoon uniformity.

Key words: Bivoltine hybrids, cocoon uniformity, single, three-way and four-way cross hybrids.

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References

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Entomology and Applied Science Letters is an international double-blind peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.

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Entomology and Applied Science Letters supports the submission of entomological papers that contain information of interest to a wider reader groups e. g. papers bearing on taxonomy, phylogeny, biodiversity, ecology, systematic, agriculture, morphology. The selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance is also important. Distinguished entomologists drawn from different parts of the world serve as honorary members of the Editorial Board. The journal encompasses all the varied aspects of entomological research.