The chemical used for polyploidy breeding is colchicine. Colchicine is a mitotic inhibitor that prevents the formation of the spindle fibers during cell division. When applied to plants, colchicine induces polyploidy by doubling the chromosome number. Polyploidy is valuable in plant breeding as it can result in increased vigor, altered phenotypes, and enhanced traits, contributing to the development of new crop varieties with improved characteristics.
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24 Mins English English75 Questions300 Marks90 Mins English English30 Questions30 Marks27 Mins EnglishWho discovered the first CMS (Cytoplasmic Male Sterile) line in rice?
Match the following correctly
a Paddy | 1. Detasseling |
b red gram | 2. CGMS |
c Cotton | 3. GMS |
d Maize | 4. Emasculation and dusting |
The inbreeding depression in synthetic and composite varieties is
Mass selection is followed in the
Rapid multiplication of disease-free plants in a short period of time is possible by
Which cytoplasm in rice is most widely used as source of male sterility?
Pure line in homogeneous population
(A): Occurs in self-pollinated crop. (R): These are progenies of a single self-fertilized individual.
Who discovered the first CMS (Cytoplasmic Male Sterile) line in rice?
Match the following correctly
a Paddy | 1. Detasseling |
b red gram | 2. CGMS |
c Cotton | 3. GMS |
d Maize | 4. Emasculation and dusting |
The inbreeding depression in synthetic and composite varieties is
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