MAS Jr. Grade • 2019 • Paper-II
Disease and pest resistance is governed by
A)
Oligogenes
B)
Polygenes
C)
Monogene
D)
All of these
Qualitative disease and pest resistance is usually controlled by oligogenes (few major genes).
MAS Jr. Grade • 2019 • Paper-II
In plant breed homozygous individuals are represented as
A)
RR or rr
B)
HP or hp
C)
HH or hh
D)
FF or ff
Homozygous genotypes have identical alleles, denoted RR or rr in classic Mendelian notation.
MAS Jr. Grade • 2019 • Paper-II
The development of seed without sexual fusion of male and female gametes is known as
A)
Vegetative reproduction
B)
Apomixis
C)
Self-incompatibility
D)
Apospory
Apomixis is asexual seed formation without fusion of gametes, producing maternal clones.
MAS Jr. Grade • 2019 • Paper-II
Variation arises by-
A)
Gene Mutation
B)
Recombination
C)
Chromosomal Mutation
D)
All of these
Heritable variation arises from gene mutations, chromosomal aberrations and recombination during meiosis.
MAS Jr. Grade • 2019 • Paper-II
Gene silencing is caused by?
A)
DNA methylation
B)
Co- Suppression
C)
Antisense RNA
D)
All of these
Gene silencing can be triggered by DNA methylation, co-suppression and antisense RNA mechanisms.
MAS Jr. Grade • 2019 • Paper-II
Tristeza disease is commonly found in
A)
Guava
B)
Citrus
C)
Grapes
D)
Banana
Tristeza, caused by Citrus tristeza virus, is a devastating disease of citrus worldwide.
MAS Jr. Grade • 2019 • Paper-II
Phyllody in sesame is caused by
A)
Bacteria
B)
Mycoplasma
C)
Insects
D)
Virus
Sesame phyllody is caused by phytoplasma (earlier called mycoplasma-like organism) transmitted by leafhoppers.
MAS Jr. Grade • 2019 • Paper-II
NPOP stands for
A)
National Programme for Organic Production
B)
National Programme for Organic Policy
C)
National Programme for onion and garlic Production
D)
National Planning for Organic Production
NPOP stands for National Programme for Organic Production, implemented by APEDA for export certification and standards.
MAS Jr. Grade • 2019 • Paper-II
powdery mildew is serious problem which of the following crops
A)
Capsicum
B)
Cucurbits
C)
Pea
D)
Okra
Powdery mildew (Sphaerotheca fuliginea) is a serious disease of cucurbits causing white powdery growth.
MAS Jr. Grade • 2019 • Paper-II
Little leaf disease in brinjal is caused by a
A)
Virus
B)
Phytoplasma
C)
Fungus
D)
Bacterium
Little leaf of brinjal is caused by phytoplasma (mycoplasma-like organism), not true virus.
MAS Jr. Grade • 2019 • Paper-II
Which one of the following is a predominant nursery disease in vegetable crops?
A)
Anthracnose
B)
Damping off
C)
Blight
D)
Rust
Damping off caused by Pythium and Rhizoctonia is the most predominant nursery disease in vegetable seedlings.
MAS Jr. Grade • 2019 • Paper-II
Which crops is known as wonder crops and meat for the poor people?
A)
Sunflower
B)
Soybean
C)
Pea
D)
Arahar
Soybean is called wonder crop and meat for the poor due to ~40% protein and 20% oil content.
MAS Jr. Grade • 2019 • Paper-II
Ginning percentage in cotton is ?
A)
24-43 %
B)
50-60 %
C)
70 %
D)
10 %
Ginning percentage or lint outturn in cotton varies 24-43% depending on variety, average around 33%.
MAS Jr. Grade • 2019 • Paper-II
Duration of Boro Rice?
A)
January - July
B)
January - February to April-May
C)
July - September
D)
July - December
Boro rice is winter-sown November-January and harvested April-May, duration January-February to April-May.
MAS Jr. Grade • 2019 • Paper-II
High Density planting in pineapple accommodates plants about
A)
10000
B)
45000
C)
30000
D)
43500
High density paired-row planting in pineapple accommodates about 43500 plants per hectare (range 43000-45000) for higher productivity.
MAS Jr. Grade • 2019 • Paper-II
Synthetic variety is developed by
A)
Crossing inbred lines tested for SCA
B)
Mixing seeds of inbred lines
C)
Crossing inbred lines tested for GCA
D)
Mixing seeds of open-pollinated cultivars
Synthetic variety is produced by inter-mating several inbred lines pre-tested for GCA then bulk harvesting.
MAS Jr. Grade • 2019 • Paper-II
For cultivation of dioecious cucurbits male and female plant should be maintain in ratio of
A)
10:1
B)
25:1
C)
20:2
D)
10:2
For dioecious cucurbits like pointed gourd, 10% male plants (10:1 female:male) ensures adequate pollination.
MAS Jr. Grade • 2019 • Paper-II
Double-helical structure of DNA was given by whom?
A)
Jacob and Monod
B)
Watson and Crick
C)
H.G. Khorana
D)
None of these
Watson and Crick proposed the double-helical model of DNA in 1953 based on Franklin's data.
MAS Jr. Grade • 2019 • Paper-II
Method of selection in plants showing vegetative propagation is:-
A)
Pedigree selection
B)
Pure line selection
C)
Clonal selection
D)
Mass selection
Vegetatively propagated crops retain genotype via clones, so clonal selection is the standard method.
MAS Jr. Grade • 2019 • Paper-II
High temperature and longer light period induces __________ in cucumber
A)
Maleness
B)
Femaleness
C)
Fruit growth
D)
Fruit ripening
High temperature and long photoperiods promote maleness in cucumber, low temp short days promote femaleness.
MAS Jr. Grade • 2019 • Paper-II
Which one of the following fruit crops is highly susceptible to salinity?
A)
Date palm (Phoenix dactylifera)
B)
Ber (Zizyphus jujuba)
C)
Pomegranate (Punica granatum)
D)
Almond (Amygdalus communis)
Almond is highly salt sensitive, while date palm, ber and pomegranate are tolerant to saline soils.
MAS Jr. Grade • 2019 • Paper-II
Fruit setting in brinjal usually in the flower having
A)
Medium style
B)
Short Style
C)
Long and medium style
D)
Short & medium Style
In brinjal, long and medium styled flowers are fertile and set fruit; short-styled flowers are sterile.
MAS Jr. Grade • 2019 • Paper-II
Which of the following cucurbits is a viviparous crop?
A)
Iskut
B)
Pointed Gourd
C)
Ivy gourd
D)
Sweet gourd
Iskut or Chayote (Sechium edule) shows vivipary where seed germinates while still inside fruit.
MAS Jr. Grade • 2019 • Paper-II
Pure line selection is also called-
A)
Inbred selection
B)
Progeny selection
C)
Single line selection
D)
All of these
Pure line selection, proposed by Johannsen, is also called single line or individual plant selection.
MAS Jr. Grade • 2019 • Paper-II
Most commonly used test for estimating GCA in crop species is
A)
Progeny test
B)
Top cross test
C)
Single cross test
D)
Poly cross test
Top cross test, crossing lines with a broad-base tester, is the standard field method to estimate General Combining Ability (GCA).
