SylbV01-00-00. pmd

BLOCK 2: Physiological genetics
Unit 1:
Genetics of Physiology in silkworm
Genetic control of hormonal mechanism. Role of voltinism genes on
determination of quantitative characters. Maternal inheritance and
its biochemical aspects. Genetic analysis of cocoon colours; physiology
of pigments, genetic relation in terms of pigment permeability and
transmission.
Unit 2:
Biochemical genetics in silkworm
Genetic basis of enzymes – amylase – esterase – alkaline phosphatase –
acid phosphatase – proteins and blood cells – haemocytes –
ultrastructure of silkprotein synthesis – glutinous protein of the mucous
gland. Importance of developmental, physiological and biochemical
genetics in silkworm management, nutrition and breeding.
VII. Practicals
• Silkworm embryo testing and preparation of slides;
• Embryonic development in non – diapausing eggs;
• Embryonic development in diapausing eggs;
• Linkage maps and regional differentiation of the chromosomes;
• Induction of parthenogenesis in silkworm, 
Bombyx mori
L.;
• Maternal inheritance in mulberry silkworm;
• Inheritance of voltinism and moultinism in silkworm;
• Maternal inheritance and biochemical aspects;
• Genetics of cocoon colours in
 Bombyx mori
L.;
• Sex determination in mulberry silkworm;
• e-group alleles as a tool of developmental genetics;
• Silkworm nutrition in relation to breeding;
• Preparation of artificial diets for mulberry silkworm, 
Bombyx mori
L.;
• Biochemical genetics: genetic basis of enzymes;
• Estimation of amylase activity in different races of silkworm;
• Determination of nad-dependent sorbitol dehydrogenase activity in the diapausing
eggs of 
Bombyx mori
L.;
• Assessment of environmental influence on expression of quantitative traits;
• Study of induction of polyploidy in silkworm.

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Sericulture