GPB Qualifying Paper (2014-2015) UAS, Raichur

UNIVERSITY OF AGRICULTURAL SCIENCES

Written Qualifying Examination – Semester II (2014–15)

Master’s Degree Programme: Genetics and Plant Breeding
Duration: 3 Hours  Maximum Marks: 100

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Section – A

Answer any FIVE questions. Each question carries 10 marks.
(5 × 10 = 50 marks)

1. Define heterosis. Discuss its types and genetic basis.

2. Explain gene action and its importance in plant breeding.

3. Describe development and analysis of diallel crosses.

4. What are the factors affecting combining ability analysis?

5. Discuss the role of biometrical techniques in plant breeding.

6. Explain the application of cytoplasmic male sterility (CMS) in hybrid seed production.

7. Describe breeding methods in cross- and self-pollinated crops.

8. Explain analysis of variability and heritability in a breeding population.

9. Write notes on selection indices and their efficiency.

10. Discuss the use of molecular markers in plant breeding.

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Section – B

Answer any FIVE questions. Each question carries 10 marks.
(5 × 10 = 50 marks)

1. Describe the AMMI model of stability analysis.

2. Write about the elements of plant breeder’s success.

3. Explain marker-assisted breeding (MAB) with suitable examples.

4. Discuss the steps involved in marker-assisted backcross breeding.

5. Write about commercial success and issues related to genetically engineered crops.