Collection of Variability

Q. Prerequisite for effective exploitation of natural genes available in the populations is

1. Collection and preservation of wild varieties, species and their relatives
2. Selection of superior recombinants
3. Evaluation and selection of parents
4. Testing, release and commercialization of new cultivars

Q. In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :

1. Cross hybridisation among the selected parents
2. Germplasm collection
3. Selection of superior recombinants
4. Evaluation and selection of parents

Q. The collection of all the diverse alleles of all genes of a given crop is termed as itscollection.

1. germplasm
2. allele
3. genophore
4. genome

Q. What are the steps involved in plant breeding?

Q. Cryopreservation is germplasm protection by

1. Energy flow in different trophic leak
2. Both A and B
3. Crossing with wild varieties
4. Low temperature

Q. What is meant by germplasm collection? What are its benefits?

Q. Germplasm includes

1. Only improved varieties of crop
2. All cultivated varieties and wild relatives of a particular crop
3. All hybridized varieties only
4. Only mutant varieties of a crop

Q. Cryopreservation is the preservation of germplasm at very low temperature of around

1. $-{121}^0$C
2. $-{196}^0$C
3. $-0^0$C
4. $-{101}^0$C.

Q. The most convenient way to maintain plant germplasm is

1. Storing seeds
2. Tissue culture
3. Developing new varities
4. Treat plants to low temperature

Q. Explain the main steps in plant breeding?