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प्रश्न
Explain the best-suited type followed by plant breeders at present?
उत्तर
Mutation breeding represents a new method of conventional breeding procedures as they have the advantage of improving the defect without losing an agronomic and quality character in agriculture and crop improvement. Mutation means the sudden heritable changes in the genotype or phenotype of an organism. Gene mutations are of considerable importance in plant breeding as they provide essential inputs for evolution as well as for recombination and selection. It is the only method for improving seedless crops.
संबंधित प्रश्न
Write a short note on ‘Mutational breeding’.
Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.
Name the following: The semi-dwarf variety of wheat is high-yielding and disease-resistant.
How has mutation breeding helped in improving the production of mung bean crop?
Briefly describe various steps involved in plant breeding.
List the two steps the classical plant breeding involves.
What are components of water potential? Explain
Describe the mass flow hypothesis for translocation of organic solutes (food) in plants.
Crosses between the plants of the same variety are called
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 |
The plant which is used for Studying hybrid vigour or heterocyst:
A collection of all the alleles of all the genes of a crop plant is called ______.
Name a man-made cereal? Trace how it was developed and where is it used?
What is emasculation? Why and when is it done?
Discuss the two main limitations of plant hybridization programme.
Give two important contributions of Dr. M. S. Swaminathan.
Suggest some of the features of plants that will prevent insect and pest infestation
Discuss the importance of testing of new plant varieties in a geographically vast country like India.
Match the following:
| Sr. No. | Column I | Column II | |
| (i) | Eutrophication | (a) | A soil erosion |
| (ii) | Biomagnification | (b) | carbon monoxide, methane |
| (iii) | Particulate pollutant | (c) | Prevention of extinction |
| (iv) | Conservation | (d) | Dust, smog |
| (v) | Gaseous pollutants | (e) | Accumulation of nonbiodegradable substances |
| (vi) | Deforestation | (f) | Death of aquatic ecosystem |
