Collection of Variability

Q. Given below are the steps involved in plant breeding:

(a) Selection and testing of superior recombinants
(b) Cross hybridisation among the selected parents
(c) Collection of germplasm
(d) Testing, release and commercialisation of new cultivars
(e) Evaluation and selection of parents

Choose the option that has the correct sequence of steps.

1. c → a → e → b → d
2. a → d → c → e → b
3. b → a → d → c → e
4. c → e → b → a → d

Q.

In-plant breeding programs, the entire collection having all the diverse alleles for all genes in a given crop is called?

1. Germplasm collection

2. Cross hybridization among all the selected parents

3. Evaluation and selection of parents

4. Selection of superior recombinants

Q. Arrange the following steps of a plant breeding programme in the correct order.

I. Selection and testing of superior recombinants
II. Collection of variability
III. Cross hybridisation between the selected parents
IV. Evaluation and selection of parents
V. Testing, release and commercialisation of new cultivars

1. $II\to IV\to III\to I\to V$
2. $I\to IV\to II\to III\to V$
3. $IV\to II\to V\to III\to I$
4. $III\to IV\to I\to V\to II$

Q. Grafting of tissue(s) or organ(s) between individuals of different species is called

1. autograft
2. isograft
3. xenograft
4. allograft

Q.

Norman Borlaug is associated with

1. Green Revolution

2. White Revolution

3. Yellow Revolution

4. Blue Revolution

Q.

Desired improved variety of economically useful crops are raised by

1. Mutation

2. Biofertilizer

3. Hybridization

4. Natural selection

Q. 1. Explaine the plant breeding and it terms
2.explain the animal breeding and classification of animal breeding

Q. In pollen banks, pollen grains are stored at _______ ̊C temperature.

1. 196
2. 54
3. -196
4. -54

Q.

Botanical Gardens are meant for

1. aesthetic value

2. knowing origin of plants

3. checking erosion and pollution

4. protecting rare plants and to maintain gene pool

Q.

In high yielding hybrid crop varieties to exploit hybrid vigour, the farmers need to purchase fresh hybrid seen every year, because

1. they are not allowed to grow their own seed

2. the hybrid vigour is lost due to inbreeding depression

3. the government of India has accepted Dunkels proposals

4. it is cheaper to purchase fresh seed

Q. How is alien dna introduced in a plant cell

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

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

Q. Match the columns and choose the correct option

	I		II
1.	Totipotency	(a)	Breeding crops with higher levels of nutrients
2.	Micropropagation	(b)	Plant grown from hybrid protoplast
3.	Somaclone	(c)	Producing large number of plants through tissue culture
4.	Somatic hybrid	(d)	Capacity to gene rate a whole plant from an explant
5.	Biofortification	(e)	Plants genetically identical to original plant

1. 1-d, 2-c, 3-e, 4-b, 5-a
2. 1-c, 2-b, 3-e, 4-d, 5-c
3. 1-d, 2-e, 3-a, 4-d, 5-c
4. 1-a, 2-e, 3-b, 4-d, 5-c
5. 1-d, 2-e, 3-b, 4-a, 5-c.

Q.

Which of the following is not used for crop improvement?

1. Inbreeding

2. Introduction

3. Hybridization

4. Mutations

Q. What is meant by germplasm collection?

Q.

Describes the objectives of plant breeding.

Q. Briefly describe various steps involved in plant breeding.

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

Q. What are the steps involved in plant breeding?

Q. Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of.

1. Vitamin-B
2. Vitamin-C
3. Omega-$3$
4. Vitamin-A

Q. Germplasm collection is

1. Collection of all species of the area in herbarium or botanical garden
2. Collection of modern varieties of a crop
3. Collection of plants or seeds having diverse alleles of all the genes of a crop
4. Collection of seeds or pollen of rare and threatened species of a group or area

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. Explain the steps in the process of plant breeding.

Q. It is easier to culture plant cells in vitro as compared to animal cells. Given reason.

Q. Which of the following statements is not correct regarding plants breeding?

1. It reduces the dependence on fungicides and bactericides.
2. It provides somaclonal variation.
3. It involves self-pollination of plants.
4. It is independent of germplasm collection

Q. Describe the objectives of plant breeding.

Q. A collection of all the alleles of all the genes of a crop plant is called:-

1. Germplasm collection
2. Protoplasm collection
3. Herbarium
4. Somaclonal collection

Q. What is plant breeding? List the two steps the classical plant breeding involves.

Q. In plant breeding, the entire collection of plants/seeds having the diverse alleles of all genes in a particular organism is called ____.

1. Gene bank
2. cDNA library
3. Genomic library
4. Germplasm

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

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