In mung bean the resistance to yellow mosaic virus and powdery mildew were introduced by:

1. Mutations

2. Hybridization

3. Tissue culture

4. Genetic engineering

Subtopic:  Breeding for Disease Resistance |
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Pusa Shubhra, an improved variety of cauliflower, is resistant to:

1. White rust

2. Bacterial blight

3. Black rot

4. Leaf curl

Subtopic:  Breeding for Disease Resistance |
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To obtain a virus free plant, what can be used as an explant in micropropogation ?

1. Apical meristem

2. Axillary meristem

3. Either apical or axillary meristem

4. Embryo

Subtopic:  Plant Tissue Culture |
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In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:

(1) Benzyl amino purine

(2) IAA

(3) 2,4 - D

(4) NAA

Subtopic:  Plant Tissue Culture |
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Inbreeding depression in animals can be overcome by:

1. A single outcross

2. Out cross for many generations

3. Cross-breeding

4. Inter-specific hybridization

Subtopic:  Animal Husbandry |
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Identify the incorrectly matched pair:

 

Crop Variety

Resistant to

1.

Himgiri

Leaf and stripe rust

2.

Karan rai

White rust

3.

Pusa sadabahar

Bacterial blight

4.

Pusa shubhra

Black rot

Subtopic:  Insect & Pest Resistance |
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Meristem culture is especially important to obtain: 

(1) Drought resistant plants

(2) Virus free plants

(3) Biofortified plants

(4) Androgenic haploids

Subtopic:  Plant Tissue Culture |
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Consider the following statements:
 

I: Hairy leaves are associated with resistance to jassids in cotton and cereal leaf beetle in wheat.
II: Low aspartic acid, high nitrogen, and sugar content in maize leads to resistance to maize stem borers.
III. In wheat, solid stems lead to non-preference by the stem sawfly and smooth-leaved and nectar-less varieties of cotton do not attract bollworms.

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Subtopic:  Insect & Pest Resistance |
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Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

Column II

I. Pusa Swarnim

II. Pusa Shubhra

III. Pusa Komal

IV. Pusa Sawani

1. Cauliflower

2. Brassica

3. Okra

4. Cow pea

Codes

            I           II         III         IV

1.         1           2           3           4

2.         2           1           4           3

3.         2           1           3           4

4.         1           2           4           3

Subtopic:  Breeding for Disease Resistance |
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Which one is the wrong pairing for the disease and its causal organism?

(1) late blight of potato-Alternaria solani

(2) Black rust of wheat-Puccinia graminis

(3) Loose smut of wheat-Ustilago nuda

(4) Root-knot of vegetables-Meloidogyne sp.

Subtopic:  Breeding for Disease Resistance |
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