10 Questions
Which of the following best describes physical/mechanical techniques used in mutation breeding?
They determine shape, size, weight, and density of seeds.
Which of the following is the most effective technique in mutation breeding?
Visual/phenotypic techniques
What is chemical mutation breeding?
The development of new varieties by generating and utilizing genetic variability through chemical mutagenesis
Which of the following is not a type of chemical mutagen?
Gamma rays
What is the advantage of using chemical mutagens over physical mutagens?
Chemical mutagens can be applied without complicated equipment.
Which of the following is a type of physical mutagen?
Gamma rays
What is the most commonly used mutagenic agent in plant mutation breeding?
Gamma rays
How long are seeds or other plant propagules typically treated with physical mutagens?
Minutes
Which of the following challenges can chemical mutagens overcome?
Constraints of time and growing space
What is the advantage of using physical mutagens over chemical mutagens?
Physical mutagens involve the use of electromagnetic radiation.
Study Notes
- There are three main types of screening/selection techniques in mutation breeding.
- Physical/mechanical techniques determine shape, size, weight, density of seeds.
- Visual/phenotypic techniques are the most effective and involve selection for plant height, adaptation to soil, growing period, disease resistance, and color changes.
- Chemical mutation breeding involves the development of new varieties by generating and utilizing genetic variability through chemical mutagenesis.
- Chemical mutagens can be applied without complicated equipment and have a higher ratio of desirable mutants to undesirable mutants.
- Base analogues, intercalating agents, and alkylating agents are types of chemical mutagens.
- Chemical mutagens can overcome challenges such as high rates of chromosome aberrations and constraints of time and growing space.
- Physical mutagens involve the use of electromagnetic radiation such as gamma rays, X-rays, UV light, fast and thermal neutrons, beta and alpha particles.
- Gamma rays have become the most commonly used mutagenic agent in plant mutation breeding.
- Seeds or other plant propagules are typically treated with physical mutagens for seconds or minutes.
Take this quiz to test your knowledge on the different screening and selection techniques used in mutation breeding. Learn about the benefits and challenges of chemical and physical mutagens, and how they can be used to develop new plant varieties. Get familiar with the various types of chemical mutagens and electromagnetic radiation, and discover which ones are most commonly used in plant mutation breeding. Test yourself and see how much you know about this fascinating field of science!
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