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Third Semester M.Sc. Degree Examination, December 2025BotanyBO 531: PLANT BREEDING, HORTICULTURE AND BIOSTATISTICS.



Third Semester M.Sc. Degree Examination, December 2025
Botany
BO 531: PLANT BREEDING, HORTICULTURE AND BIOSTATISTICS

(2024 Admission)

Time: 3 Hours
Max. Marks: 75

Answer these questions in one or two sentences. 

Each question carries 1 mark.


1. Who introduced maize in India?
2.Name an organization in India for plant introduction.
3.  What is BSI?
4.What is Super Rice?
5.Define somaticplastic sterility?
6.What is a chemical mutagen? Give example.
7.What is Arboriculture?
8.What is MAP in Horticulture?
9.Define probability.
10. What is LSD in Biostatistics?

(10 × 1 = 10 Marks)


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


11] Comment on Primary plant introduction.
               OR

12. What are microcenters? Explain.


13.Explain zygotic sterility. How can we overcome this in plant breeding?
                         OR

14 Describe a green house and its uses.
       

 15.Give an account of garden tools.
                              OR
16. What is a soil mixture? How is it prepared?


17. Name the different soil types used for planting?
                       OR
18. What is Integrated Pest management?


19.What are Ogives? Mention its uses?
                          OR
20.Define PCA and its importance in Biostatistics.

        (5 × 2 = 10 Marks)

3. Answer the following in not more than 150 words.


21. Give an account of National Centers of plant breeding. Cite a few international centers  of plant breeding.
                     OR
22. Give an account of methods to overcome self incompatibility.

23. What is open pollinated cultivar? How is it different from pure line cultivar?
                         OR
24. What is the role of intergeneric hybridization in plant improvement?


25. Give an account of back cross breeding technique and its achievements in plant breeding.
                         OR

 26. Comment on polyploidy breeding and its types. 

27. Describe how double cross can be achieved.. 
                          OR
28   Explain how synthetic crosses are produced. 

29. Explain the principle of resistance breeding. 
                     OR

30.Give an account of National Biodiversity Policy.


31 Describe the different method of cutting techniques used in plant propagation.
                     OR 
32. Explain the method of setting up of a vegetable garden.

33. What is test of significance? Explain the types of statistical methods used for test of significance.
                         OR
34. Briefly explain probability and its uses in biostatistics.

(7 x 5 = 35 Marks)
IV.Answer the following in not more than 250 words. 

35. Explain heterosis breeding. Give a note on its achievements.
OR
36. Describe mutation breeding and its achievements.


37. Briefly explain harvesting and post harvesting technology of horticultural crops.
OR
38. Construct a histogram from a biological data. Give an account of statistical tools used in Biological research.
(2 x 10 = 20 Marks)

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