E-content for B.Sc.III GENETICS AND PLANT BREEDING 2022-2023

UNIT	Presentation	Reading material	Video link
UNIT-I: GENETICS-I
1. Mendelian inheritance: Mendel's Laws of inheritance. Explanation and examples of Monohybrid cross, dihybrid cross (back cross and test cross) 2. Gene interaction and epistasis (Allelic and non-allelic) explanation and examples of, 9:7, 9:3:4, 12:3:1 and 15:1 ratios, Collaborator gene (comb shape in fowl) 3. Sex determination: Discovery of sex chromosomes chromosomal theory of sex determination, sex determination in insects (XOXX), Birds (ZW- ZZ method), Animals (Drosophila and Man), and Plants (Melandrium and Asparasgus).	PPT1 PPT2	PDF
UNIT –II: GENETICS-II
1. Linkage: (Definitions and significance) Coupling and repulsion hypothesis. Type of linkage (maize and drosophila), Sex linked inheritance: Definition classification (x-linked, ylinked and xy-linked) 2. Sex linked inheritance in Drosophila (white eye colour), Man (Hemophilia, colour blindness and holandric gene-hypertrochosis) and Birds (barred feathers) 3. Genetic variations: Polyploidy, Euploidy-Autoployploidy and Allopolyploidy with reference to Raphanobrassica and Hexaploid wheat, Aneuploidy (Hyper and Hypoploidy), Syndromes in human i) Down's syndrome ii) Edward’s syndrome iii) Patau's syndrome iv) Turner’s syndrome v) Klinefelter’s syndrome.	PPT3	PDF
UNIT –III: PLANT BREEDING-I
1. Introduction and objectives of plant breeding, methods of plant breeding: Selection-Mass selection, pure line selection and clonal selection, 2. Hybridization: definition, objectives, various steps in hybridization, applications,3. Heterosis and hybrid vigour: definition, effects, utilization and limitations.	PPT4 PPT5	PDF
UNIT –IV: PLANT BREEDING -II
1. Plant introduction and acclimatization, types, advantages and disadvantages, 2.: objectives, procedure, applications, Mutational breeding with reference to groundnut 3. Male sterility: Genetic Male Sterility (GMS), Cytoplasmic Male Sterility (CMS), Role of Biotechnology in crop improvement (brief account)	PPT6 PPT7	PDF	ACCLIMATIZATION Mutational breeding CMS GMS