TLS Online TPP Program
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TLS Online TPP Program
#Question id: 39285
#Plant Biotechnology
Q. Statement I: Protoplast fusion can be used to develop male sterile lines even between sexually incompatible species.
Statement II: CMS lines developed through this method cannot be used with traditional CMS restorers.
TLS Online TPP Program
#Question id: 39286
#Plant Biotechnology
Q. Assertion: Cybrids can be produced by the irradiation of protoplasts from one of the fusion parents.
Reason: Irradiation effectively inactivates the nucleus of the donor protoplast, allowing only its cytoplasm to contribute to the fusion product.
TLS Online TPP Program
#Question id: 39287
#Plant Biotechnology
Q. Assertion: Cybridization is a valuable tool for transferring traits like cytoplasmic male sterility (CMS) and herbicide resistance in crops like rice and tobacco.
Reason: Cybrids contain the nuclear genome of only one species, which ensures the plant retains its primary species characteristics while gaining specific cytoplasmic traits.
TLS Online TPP Program
#Question id: 39288
#Plant Biotechnology
Q. Assertion: Cybrids allow for the combination of mitochondria from one species with chloroplasts from a different species.
Reason: This combination can be used to overcome deleterious effects, such as chlorophyll deficiency, found in some alloplasmic lines.
TLS Online TPP Program
#Question id: 39289
#Plant Biotechnology
Q. Assertion:Brassica napus lines carrying Ogura (radish) cytoplasm are highly efficient for commercial growth in cold climates without any modifications.
Reason: The presence of radish chloroplasts in these lines causes chlorophyll deficiency under low temperatures.
TLS Online TPP Program
#Question id: 39290
#Plant Biotechnology
Q. Assertion: Protoplast fusion between CMS B. napus (with radish cytoplasm) and normal B. napus can produce healthy male sterile plants.
Reason: The resulting cybrids can retain the radish mitochondria (for CMS) while replacing the radish chloroplasts with B. napus chloroplasts.