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Pune University - SY BSc (Sem - I) VOC SEED TECHNOLOGY : Paper - IV, April 2010

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Total No. of Questions : 4] P296 [3717] - 141 S.Y. B.Sc. SEED TECHNOLOGY Hybrid Seed Production (Paper - IV) (Vocational) (Sem. - I) (New Course) Time : 2 Hours] Instructions to the candidates: 1) 2) 3) [Total No. of Pages :2 [Max. Marks : 40 All questions are compulsory. Figures to the right indicate full marks. Draw neat labelled diagrams wherever necessary. Q1) Attempt the following : a) What is heterosis? b) Define gametophytic male sterility. c) What is self incompatibility? d) Define gametocides. e) Give the types of variety. f) What is planting ratio? g) Comment on pollen viability. h) What do you mean by maintainer line-B? i) Give any two significance of apomixis. j) [10 1 = 10] Define detasseling. Q2) Attempt any two of the following : [2 5 = 10] a) Explain genetic basis of inbreeding depression. b) What is cytoplasmic male sterility? Add a note on their use in hybrid seed production. c) Describe any two types of pollination. P.T.O.

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Additional Info : S.Y. B.Sc. Seed Technology (Semister - I) : Hybrid Seed Production (Paper - IV) (New Course) (Vocational), Pune University
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