Time Allowed: Three Hours Maximum Marks: 200
Candidates should attempt Questions 1 and 5 which are
compulsory and any THREE of the remaining questions, selecting at least ONE
question from each Section.
SECTION –A
1.
Answer any FOUR f the following in about
150 words each:-
(a)
Define heritability. Mention its laws and their
significance is plant breeding.
(b)
Explain hybrid vigour and its exploitation in
crops.
(c)
Differentiate between pure line selection and
recurrent selection.
(d)
Give physiological importance of diffusion and
osmosis.
(e)
Classify plant diseases.
2.
(a) Define cxytoplasmic inheritance, combining
ability, biotype peast and forecasting.
(b) How
a method of plant breeding differs with a breeding technique?
(c) Do the climatic requirements and the cultural practices of crop
production carry the same meaning or differ with one another? Explain in brief.
(d)
Give the procurement and processing constraints of food grains.
3.
Write short notes on the following in about 150
words each:-
(a)
Chromosomal aberrations
(b)
Control measures of diseases of food grains
during storage
(c)
Raising of ornamental flower corps
(d)
Importance of package of practices for
cultivation of vegetable crops
4.
(a) Give time of sowing and harvesting time,
seed rate and yield per hectare of crops namely wheat, cotton, potato, brinjal
and carrot.
(b) Mention time of planting, no
of plants required to plant one hectare, fertilizer (NPK) quantity per plant
and fruit yield / hectare of guava papaya, grapes and mango.
SECTION
–B
5.
Describe any four of the following in about 150
words each:-
(a)
Mode of action of pesticides
(b)
Cultivation and export significance of
chrysanthemum.
(c)
How evolution takes place in nature? Give its
significance.
(d)
Describe factors responsible for poor seed
germination and methods to improve germination.
(e)
Why back cross method of breeding is used for
incorporating disease resistance n plants? How will you transfer resistance
when the resistance controlling gene is recessive?
6.
Write short notes on any FOUR of the following
in 150 words each:
(a)
Methods of breaking seed dormancy
(b)
Meiosis
(c)
Male sterility
(d)
Plant propagation of fruit crops
(e)
Overcoming weather hazards to avoid crop damage
7.
Distinguish between the two in 150 words each:
(a)
Certified and registered seed
(b)
Sex linked and sex influenced characters
(c)
Inter-specific and inter-generic hybridization
(d)
Sexual and asexual reproduction
8.
Comment on any FOUR of the following in about
150 words each:
(a)
A multi line variety compared to a pure line
variety can resists disease spread better but it lacks purity of seed
(b)
Auxins and hormones play important role in plant
development and growth
(c)
Processed fruits and flower products fetch
higher gains than the unprocessed ones, provided quality standards are
maintained
(d)
Agriculture is a gamble in the dark
(e)
High yielding crop varieties boosted food grain
production besides saving foreign exchange.
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