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Silk

Santhosh Kumar 03/11/2023
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Silk mind map Context Researchers in China Model proposal Explain cocoon colour variations Source: TH Silk reeling From cocoons of silk moth (Bombyx mori) Classification based on feed Domestication Over 5,000 years ago From wild moth (Bombyx mandarina) In China Types of silk Mulberry Long, fine, smooth threads Non-mulberry Shorter, coarser, harder threads Mulberry Silk Ancestral Species Bombyx mandarina Domesticated Species Bombyx mori Spread From China, Korea, Japan, Russia To around the world including India Size comparison Smaller in wild Larger when domesticated Fibre length Shorter in wild Up to 900 metres in domesticated Cocoon colour range From brown-yellow in wild To various colours in domesticated Yellow-red Gold Flesh Pink Pale green Deep green White Flying ability Exists in wild Lost in domesticated Pigmentation Observed in wild Lost in domesticated India's silk production 2nd largest producer After China Non-mulberry silk 30% of India's silk production Silk Colour Carotenoids and flavonoids In mulberry leaves Absorbed by silkworms Transport to silk glands Bound to silk protein Domesticated cocoons Water soluble colour Fades over time Chemical compounds Made by the mulberry leaves Cocoon colour mutations Responsible for different colours

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