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Latest Research News on Silkworm: March – 2020

March 4, 2020 by Editor NetKumar

Surprising strength of silkworm silk

Commercial silkworm silk is presumed to be much weaker and less extensible than spider dragline silk, which has been hailed as a ‘super-fibre’1,2,3,4. But we show here that the mechanical properties of silkworm silks can approach those of spider dragline silk when reeled under controlled conditions. [1] 

The Genome Sequence of Silkworm, Bombyx mori 

We performed threefold shotgun sequencing of the silkworm ( Bombyx mori ) genome to obtain a draft sequence and establish a basic resource for comprehensive genome analysis. [2] 

The genome of a lepidopteran model insect, the silkworm Bombyx mori

Bombyx mori, the domesticated silkworm, is a major insect model for research, and the first lepidopteran for which draft genome sequences became available in 2004. Two independent data sets from whole-genome shotgun sequencing were merged and assembled together with newly obtained fosmid- and BAC-end sequences. [3]

Rearing Performance of Some Popular Bivoltine Silkworm (Bombyx mori L.) Breeds during Spring Season

Twelve popular bivoltine silkworm (Bombyx mori L.) breeds viz., CSR2, NB4D2, SK-1, CSR4, DUN6, SH6, SK-6, CSR19, SK-28, DUN22 and SK-31, were evaluated for their performance during spring 2012 and 2013. The data generated in respect of different traits during two years was recorded replication wise and pooled. The pooled data was analyzed statistically and subjected to multiple trait evaluation index using Mono’s evaluation index method. Analysis of variance showed significant [4]

Non-target Host Immune Gene Modulation in Transgenic Silkworm Bombyx mori Endowed with RNAi Silence BmNPV Genes

Aim: To reveal differential expression of host- response genes activated after nuclear polyhedro virus infection in transgenic silkworm Bombyx mori larva and to show an influence of ‘BmNPV transgenes’ on expression pattern of host- response genes.[5]

Reference

[1] Shao, Z. and Vollrath, F., 2002. Surprising strength of silkworm silk. Nature, 418(6899), pp.741-741.

[2] Mita, K., Kasahara, M., Sasaki, S., Nagayasu, Y., Yamada, T., Kanamori, H., Namiki, N., Kitagawa, M., Yamashita, H., Yasukochi, Y. and Kadono-Okuda, K., 2004. The genome sequence of silkworm, Bombyx mori. DNA research, 11(1), pp.27-35.

[3] International Silkworm Genome Consortium, 2008. The genome of a lepidopteran model insect, the silkworm Bombyx mori. Insect biochemistry and molecular biology, 38(12), pp.1036-1045.

[4] Buhroo, Z.I., Malik, M.A., Ganai, N.A., Kamili, A.S. and Mir, S.A., 2017. Rearing Performance of Some Popular Bivoltine Silkworm (Bombyx mori L.) Breeds during Spring Season. Advances in Research, pp.1-11.

[5] Varada, B., Pradeep, A.N.R., Awasthi, A.K., Sivaprasad, V., Ponnuvel, K.M. and Mishra, R.K., 2017. Non-target Host Immune Gene Modulation in Transgenic Silkworm Bombyx mori Endowed with RNAi Silence BmNPV Genes. Biotechnology Journal International, pp.1-12.

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