Third Semester M.Sc. Degree Examination, January 2023 Botany BO 231 PLANT BREEDING, HORTICULTURE AND BIOSTATISTICS

Third Semester M.Sc. Degree Examination, January 2023

Botany

BO 231 PLANT BREEDING, HORTICULTURE AND BIOSTATISTICS

Time: Three Hours

(2019 Admission Onwards)

I. Answer the following questions.

1.What is green super rice?

2.What are the functions of ICAR-NBPGR?

3.Give the importance of floral biology in plant breeding.

4.How do you develop a synthetic variety?

5.Where can you find gene-for-gene relationships?

6.Describe the significance of biodiversity policy.

7.What is Olericulture?

8.Describe the advantages of in door garden.

9.What is Students's t-test?

10. Explain Ogive graph.

(10 × 1 = 10 Marks)

11.Answer the following questions in not more than 50 words.

11. (a) Explain hybridization and mention it's procedure.

OR

(b) Write short notes on the concept of centers of origin proposed by Vavilov.

12. (a)

Describe cytoplasmic male sterility and its uses.

OR

(b) Explain the role of interspecific and intergeneric hybridization.

13. (a) What is seed certification? How is it done?

OR

(b) Describe split-plot design.

14. (a) Give a short account on organic fertilisers.

OR

(b) What is garden design and who does it?

15. (a) Describe briefly regression analysis.

OR

(b) Compare broad sense heritability and narrow sense heritability.

(5 x 2 = 10 Marks)

III.Answer the following questions in not more than 150 words.

16. (a) Compare the back cross and multiple cross methods of hybridization of

self-fertilized crops.

OR

(b) Distinguish between mass selection and pureline selection.

2

17. (a) Describe primary, secondary and microcenters of genetic diversity.

OR

(b) Explain the salient features of heterosis. Add notes on heterobeltiosis.

18. (a) Compare pedigree and bulk methods of breeding. Mention their merits and demerits.

OR

(b) Describe chromosome manipulation techniques used in plant breeding and its significance.

19. (a) Write notes on mutation breeding and its applications.

OR

(b) Distinguish between single-gene resistance and many-gene resistance.

20. (a) Give an account of floriculture and floral industry.

OR

b) Describe the common types of vegetative propagation techniques used in plants.

21. a) Discuss on the types of green houses and the equipments used in it.

OR

(b) Describe various hand tools used in horticulture. Mention their uses.

22. (a) Give a general account of the measures of dispersion. Add notes on their coefficients.

OR

(b) Give an account on chi square test and its applications.

(7 x 5 = 35 Marks)

IV. Answer the following questions in not more than 250 words.

23. (a) Give a detailed account of male sterility in crop plants.

OR

(b) Discuss on the types, methods, merits and demerits of selection as a breeding method.

24. (a) Describe the various post planting practices followed upto harvest.

OR

(b) Give a general account of probability distributions. Add notes on binomial and poisson distributions.

(2 x 10 = 20 Marks)