By which method was a new breed 'Hisardale' of sheep found by using Bikaneri ewes and Marina rams?

1. Mutational breeding

2. Cross breeding

3. Inbreeding

4. Outcrossing

Subtopic:  Animal Husbandry |
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Inbreeding depression is -

1.  Reduced motility and immunity due to close inbreeding
2.  Decreased productivity due to mating of superior male and inferior female
3.  Decrease in body mass of progeny due to continued close inbreeding
4.  Reduced fertility and productivity due to continued close inbreeding
Subtopic:  Animal Husbandry |
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In mung bean, resistance to yellow mosaic virus, and powdery mildew was brought about by:

1. Mutation breeding

2. Biofortification

3. Tissue culture

4. Hybridization and selection

Subtopic:  Breeding for Disease Resistance |
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Select the incorrect statement regarding inbreeding:

1. Inbreeding helps in elimination of deleterious alleles from the population

2. Inbreeding is necessary to evolve a pure-line in any animal

3. Continued inbreeding reduces fertility and leads to inbreeding depression.

4. Inbreeding depression cannot be overcome by out-crossing.

Subtopic:  Animal Husbandry |
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Consider the following four statements (I-IV) and select the option which includes all the correct ones only :

I.  Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc.
II.  Body weight-wise, the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than that produced by a cow per day through its milk.
III.  Common button mushrooms are a very rich source of vitamin C.
IV.  A rice variety has been developed which is very rich in calcium.
 

1.  Statements (I), (III) and (IV) 

2. Statements (II), (III) and (IV) 

3. Statements (I), (II) 

4. Statements (III), (IV) 

Subtopic:  Single Cell Protein |
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Green revolution in India occurred during -
1.  1970's
2.  1980's
3.  1950's
4.  1960's

Subtopic:  Plant Breeding & Its Steps | Impact: Green Revolution |
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The name of Norman Borlaug is associated with-

(1) Green Revolution

(2) White Revolution

(3) Yellow Revolution

(4) Blue Revolution

Subtopic:  Impact: Green Revolution |
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Which of the following is generally used for induced mutagenesis in crop plants ?

1. Gamma rays (from cobalt 60)

2. Alpha particles

3. X rays

4. UV (260 nm)

Subtopic:  Breeding for Disease Resistance |
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Three crops that contribute maximum to global food grain production are -

(1) Wheat, rice and maize

(2) Rice, maize and sorghum

(3) Wheat maize and sorghum

(4) Wheat, rice and barley 

Subtopic:  Impact: Green Revolution |
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Why is vivipary an undersirable character for annual crop plants -
1. It reduces the vigour of the plant
2. The seeds exhibit long dormancy
3. It adversely affects the fertility of the plant
4. The seeds cannot be stored under normal conditions for the next season

Subtopic:  Breeding for Disease Resistance |
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