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voltinism and biology of silkworm ppt

Recently, it has become possible to study the phylogeny at the level of nucleic acid, protein and terminal product, owing to rapidly developed molecular biology. Proc. Acad. Unit-S 9 Hrs. • The silkworm spins approximately 1 mile of filament and completely encloses itself in a cocoon in about two or three days. It is well known for genuine silk. 5. Genetic engineering of the silkworm, Bombyx mori, opens door to the production of new kinds of silk and to the use of silkworms as proteosynthetic bioreactors. History of Mulberry Silkworm: Bombyx mori is popularly called the Chinese silkworm or Mulberry silkworm moth. The insertion of foreign genes into silkworm genome and the control of their expression by diverse promoters have become possible but are not yet efficient enough for commercial use. Morphology of egg, larva, pupa and adult. the origin of the silkworm and differentia­ tion of the silkworm races because of a lack of more efficient technical methods for an approach to the problem. 14. Life Cycle 5. Biology of silkworm Bombyx mori - Life cycle of Bombyx mori. 12' Classification of silkworms based on moultinism, voltinism and geographical distribution. Jpn. 17. Due to its small size and ease of culture, the silkworm has become a model organism in the study of lepidopteran and arthropod biology. Pebrine Pebrine is a chronic and disastrous disease of the silkworm was responsible for the sudden collapse of the silkworm industry of … : its preventions through physical, mechanical and chemical means, integrated management of the pest. China is the native place of this moth, but now it is totally domesticated and successfully reared in … Silkworm genetics Genetics of the qualitative traits. Biology of Bombyx Mori: The mulberry silk moth, Bombyx mori belongs to the family Bombycidae. 3. Metamorphosis – Definition – types – significance. 13' Popular silkworm breds and hybrids of Karnataka and their economic traits. 16. Unit-G 10 Hrs. Diseases 7. 4 Fukuda, S. (1951) The production of the diapause eggs by transplanting the suboesophageal ganglion in the silkworm. voltinism and moultinism – popular mulberry silkworm varieties of Karnataka and India. Share Your PPT File. The larva of Bombyx mori, commonly called a silkworm, is host specific to mulberry. UNIT – II 1. thMorphology of Bombyx mori: Egg, larva (Newly hatched and V instar), pupa and moth. 4 0 obj Thus the lifecycle of a silkworm begins again. the major protozoan disease of the silkworm is the pebrine disease, so named due to the appearance of black peppery patches following infection. Integument: its structure and derivatives. Occurrence, nature of damage, prevention and control of other pests of silkworm like Pantatomid bug … • The silk is produced in two glands in the silkworm's head and then forced out in liquid form through openings called spinnerets. Economic Importance 6. External Features 4. 2. The purpose of this article is to review silkworm (Bombyx mori) as a genetic resources of Turkey. It was estimated that silkworm genome consist of about 4.8× 108 bp, its genetic information volume is about one sixth of human being. Biology, nature of damage and other hosts of Dermistes spp. • The silk solidifies when it comes in contact with the air. In this article we will discuss about the biology and life cycle of bombyx mori. There are over 450 morphological, physiological and biochemical characters recorded at present, among them 300 ( including multi-allele) had been located on 27 Ltfe cycle of silkworm Bombyx mori L. 15. The importance of silkworm in … Other Silkworm Moths. 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