Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology. - Biology


Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.



Important steps involved in conventional breeding technology:-

(i) Selection of parent plant with desired combination of characters

(ii) Hybridisation of selected plants

(iii) Selection and evaluation of hybrids

(iv) Testing and release of new varieties for commercial production

Concept: Plant Breeding
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2015-2016 (March) All India Set 1

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Give reason :
Emasculation is done in a flower which is selected as female parent.

What is ‘biofortification’?

What is plant breeding?

How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.

Plant breeding technique has helped sugar industry in North India. Explain how.

In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.

(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra

What is emasculation?

What are transgenic plants? Explain with any two examples

In an agricultural field there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:
(a) White rust
(b) Leaf and stripe rust
(c) Black rot
(d) Jussids

Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus improve the crop yiel.

What is heterosis?

What are analogous organs? Describe with one example from the plant kingdom.

Define the term water potential.

What are components of water potential? Explain

Definition and importance of Imbibition

Describe the mass flow hypothesis for translocation of organic solutes (food) in plants.

What is Biofortification? Explain selective breeding with suitable example.

Give a reason for the following: 

Bagging is essential in artificial hybridization.

Answer the following question.
How did plant breeding techniques help north Indian farmers to develop cane with desired characters?

Give an account of mutation breeding with examples.

Describe briefly various steps of plant breeding methods.

While studying the history of the domestication of various cultivated plants _______ were recognized earlier.

Plants having similar genotypes produced by plant breeding are called

Importing better varieties and plants from outside and acclimatizing them to the local environment is called

Crosses between the plants of the same variety are called

Which one of the following crop varieties correct matches with its resistance to disease?

Variety Resistance to disease
a) Pusa Komal Bacterial blight
b) Pusa Sadabahar White rust
c) Pusa Shubhra Chilli mosaic virus
d) Brassica Pusa swarnim

Explain the best-suited type followed by plant breeders at present?

Column - I contains names of host plant while Column - II contains names of viral dieases. Find the correct option.

  Column-I   Column-II
(I) Banana (p) little leaf
(II) Sugarcane (q) bunchy top
(III) Papaya (r) leaf roll
(IV) Brinjal (s) grassy shoot
    (t) leaf curl

Smooth leaved and necterless cotton varieties are NOT affected by ____________.

In hybridization experiments 'true breeding' means off-springs show ____________.

The science of changing and improving the heredity of plants is called ______

Which method of plant breeding has been used to develop a powdery mildew-resistant variety of moong beans?

Sonora – 64 is a variety of ______.

Give any four advantages of mutation breeding.

Animal husbandry and plant breeding programmes are the examples of:

The biggest constraint of plant breeding is:

Breeding of crops with high levels of minerals:

Mechanism of fast Speciation in crop plants is ______.

If a diploid cell is treated with colchicine then it becomes:

Polyploidy leads to the rapid formation of new species because:

The plant which is used for Studying hybrid vigour or heterocyst:

Shakti, Rattan and protina are three important lysine-rich varieties of:

Which one of the following pathogens causes cancer disease?

The biggest constraint of plant breeding is ______.

Sugarcane which grow in North India, and which do not grow in north India. 

Match the columns-

  Column A   Column B
A. Kalyan Sona 1. Rice
B. Pusa sawani 2. Wheat
C. IR - 8 3. Okra

Mutations in plant cells can be induced by ______

Which of the following is not an objective of Biofortification in crops?

The agriculture sector of India employs about ______.

A collection of all the alleles of all the genes of a crop plant is called ______.

What is meant by ‘hidden hunger’?

Discuss the two main limitations of plant hybridization programme.

It is said, that diseases are spreading faster due to globalisation and increased movement of people. Justify the statement taking the example of H5N1 virus.

How the resistance in crops can be developed?

Write two varieties of sugarcane having high sugar content.

Bioforified crops are ______.


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