Strategies for Enhancement in Food Production · Question 33

Somaclones are obtained by :

1. Tissue culture
2. Plant breeding
3. Genetic engineering
4. Irradiation

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

1. Downy mildew of grapes
2. Bacterial leaf blight of rice
3. Loose smut of wheat
4. Black rust of wheat

Consider the following four measures (i-iv) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common: (i) Spray with Bordeaux mixture (ii) Control of the insect vector of the disease pathogen (iii) Use of only disease-free seeds (iv) Use of varieties resistant to the disease Which two of the above measures can control the disease?

1. (i) and (ii)
2. (i) and (iv)
3. (ii) and (iii)
4. (iii) and (iv)

In cloning of cattle a fertilized egg is taken out of the mother's womb and:

1. In the eight cell stage the individual cells are separated under electrical field for further development in culture media
2. The egg is divided into 4 pairs of cells which are implanted into the womb of other cows
3. In the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows
4. From this up to eight identical twins can be produced

Which one of the following is a viral disease of poultry?

1. Salmonellosis
2. Newcastle disease
3. Pasteurellosis
4. Coryza

In maize, hybrid vigour is exploited by:-

1. Crossing of two inbred parental lines
2. Bombarding the seeds with DNA
3. Harvesting seeds from the most productive plants
4. Inducing mutations

Crop plants grown in monoculture are-

1. Characterised by poor root system
2. Highly prone to pests
3. Low in yield
4. Free from intraspecific competition

In Maize, hybrid vigour is exploited by-

1. Crossing of two inbred parental lines
2. Inducing mutations
3. Harvesting seeds from the most productive plants
4. Bombarding the protoplast with DNA

In order to obtain virus-free plants through tissue culture the best method is-

1. Anther culture
2. Protoplast culture
3. Meristem culture
4. Embryo rescue

Triticale, the first man-made cereal crop, has been obtained by crossing wheat with

1. Pearl millet
2. Sugarcane
3. Rye
4. Barley