Download PTU B.Sc-Agriculture 2020 March 7th Sem 77099 Theory And Practices Of Plant Breeding Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) B.Sc-Agriculture 2020 March Previous Question Papers

1 | M-77099 (S2)-2407
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (Agriculture) (Sem.?7)
THEORY AND PRACTICES OF PLANT BREEDING
Subject Code : BSAG-PGB-703
M.Code : 77099
Time : 3 Hrs. Max. Marks : 90
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying THREE
marks each.
2. SECTION-B contains FIVE questions carrying SEVEN AND HALF marks each
and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying FIFTEEN marks each and
students have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a. Megasoprogenesis
b. Dichogamy
c. Inbreeding Depression
d. Genetic advance
e. Chiasmogamy
f. Inbred line
g. Composites
h. Physical mutagen
i. DAALs
j. Pure line
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1 | M-77099 (S2)-2407
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (Agriculture) (Sem.?7)
THEORY AND PRACTICES OF PLANT BREEDING
Subject Code : BSAG-PGB-703
M.Code : 77099
Time : 3 Hrs. Max. Marks : 90
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying THREE
marks each.
2. SECTION-B contains FIVE questions carrying SEVEN AND HALF marks each
and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying FIFTEEN marks each and
students have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a. Megasoprogenesis
b. Dichogamy
c. Inbreeding Depression
d. Genetic advance
e. Chiasmogamy
f. Inbred line
g. Composites
h. Physical mutagen
i. DAALs
j. Pure line
2 | M-77099 (S2)-2407
SECTION-B
2. What is self-Incompatibility and its different types? How it can be exploited in crop
improvement programme?
3. What is polyploidy breeding? Describe the methods of production of autopolyploid and
their importance in crop improvement.
4. Define mutations. What are the various means of inducing mutations? List the
achievements of mutation breeding in India.
5. Illustrate a generalized scheme for clonal selection in sugarcane. What are its merits and
demerits?
6. What is recurrent selection? List the various types of recurrent selection. Which scheme
do you prefer and why?

SECTION-C
7. What is male sterility? List the various types of male sterility systems operating in plants.
How CGMS is being used in developing hybrids in sorghum and rice?
8. Discuss in detail the pedigree method of handling the segregating generations along with
its merits. Also mention any one of its modification in detail.
9. Describe the genetic basis of heterosis along with objections and explanations. Discuss
the achievements in hybrid breeding in maize and pearl millet from Indian perspective.






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