Breeding Disease Resistant Plants

Q. Methods of breeding for disease resistance include

1. Conventional breeding methods like hybridisation and selection
2. Inducing mutations and then screening for resistance
3. Selection among somaclonal variants and genetic engineering
4. All of these

Q. Controlled mating followed by selection in order to obtain superior genotypes of domesticated animals is known as

1. Weeding
2. Feeding
3. Breeding
4. Heeding

Q.

____________ is a bacterial disease in plants.

Q.

Most cultivated plants are

1. Autopolyploids

2. Aneuploids

3. Haploids

4. Allopolyploids

Q. Choose the bacterial disease from the following:

1. Brown rust of wheat
2. Black rot of crucifers
3. Tobacco mosaic
4. Late blight of potato

Q. Breeding of crops with high levels of minerals, vitamins and proteins is called

1. Biomagnification
2. Micropropagation
3. Somatic hybridisation
4. Biofortification

Q. One of the most important reason why wild varieties of a species should thrive is that they are a good source of

1. Rare and highly sought after fruits of medical importance
2. Unsaturated edible oils
3. Highly nutritive animal feed
4. Genes for resistance to diseases and pests

Q. Define and explain variation with example.

Q. How can disease resistance be incorporated in crops?

1. None of the above
2. By crossing disease resistant wild relative with the crop variety
3. By domestication of the crops
4. By removing the R genes from the crops

Q. Which of the following is an important objective of biotechnology in agriculture section?

1. To produce pest resistant varieties of plants
2. To increase the nitrogen content
3. The decrease the seed number
4. To increase the plant weight

Q. Parbhani Kranti, a variety of bhindi (lady finger) is resistant to

1. Bacterial blight.
2. Yellow mosaic virus.
3. Black rot.
4. Leaf curl.

Q.

Which one of the following pair is incorrectly matched in respect to the "crop varieties for disease resistance"?

1. Cowpea - Bacterial blight

2. Cauliflower - Tobacco mosaic virus and leaf curl

3. Wheat - Leaf and stripe rust

4. Brassica - White rust

Q. Which of the following is an important objective of biotechnology in the field of agriculture?

1. To decrease the seed number
2. To produce disease resistant varieties of plants
3. To increase the nitrogen content
4. To increase the plant weight

Q. (a) Name the tropical sugarcane variety grown in South India. How has it helped in improving the sugarcane quality grown in North India?
(b) Identify 'a', 'b' and 'c' in the following table:

Q. What is genetic engineering? What are the proposed benefits of genetic engineering in crop improvement? What are the present constraints ?

Q. Name the following:
(a) The semi-dwarf variety of wheat is high-yielding and disease-resistant.
(b) Any one inter-specific hybrid mammal.

Q. Resistance is the ability to prevent the pathogen from causing disease.
(1) Elucidate the steps in breeding for disease resistance.
(2) Cite two examples for virus resistant plants.

Q. Which statement correct about centre of origin of plant : -

1. More diversity in improved variety
2. Frequency of dominant gene is more
3. Climatic condition more favourable
4. None

Q. Pusa Shubra is a variety of

1. Cauliflower
2. Chilli
3. Wheat
4. Cabbage

Q. Which of the following is a correct match between crop, variety and resistance to diseases?

1. Crop - Wheat, Variety - Himgiri, Resistance to disease - White rust
2. Crop - Brassica, Variety - Pusa Sadabahar, Resistance to disease - Black rot
3. Crop - Cowpea, Variety - Pusa Komal, Resistance to disease - Bacterial blight
4. Crop - Chilli, Variety - Pusa Swarnim, Resistance to disease - Chilly mosaic virus

Q. Differentiate between.
Autopolyploids and allopolyploids

Q. Cryobiology deals with

1. Physiology
2. Temperature effect
3. Anatomy
4. Characteristics of biomolecule

Q. Which of the following are ways of creating disease resistant varieties of crops?

1. Biotechnology
2. Traditional breeding
3. Chemical fertilizers
4. Mutation breeding

Q. How can we make our crops disease resistant?

1. By spraying insecticides and pesticides
2. Eliminating wild species
3. Destroying diseased ones
4. By crossing them with their wild relatives

Q. Match column I (crop) with column II (corresponding disease resistant variety) and select the correct option from the given codes.

Q. Methods of breeding for disease resistance include

1. Inducing mutations and then screening for resistance
2. Conventional breeding methods like hybridisation and selection
3. Selection among somaclonal variants and genetic engineering
4. All of these

Q. Arrange the process of creating disease resistant plant varieties in the correct order.

1. New cultivars
2. Screen germplasm
3. Hybridisation
4. Screen progeny

Q. How did plant techniques help north Indian farmers to develop cane with desired characters?

Q. Arrange the process of creating disease resistant plant varieties in the correct order.

1. New cultivars
2. Screen germplasm
3. Hybridisation
4. Screen progeny

Q. Ability of an organism to resist disease is called as host resistance.

1. True
2. False
3. Ambigous
4. Data insufficient