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Genes for cytoplasmic male sterility in plants are generally located in : -
A
Chloroplast genome
B
Mitochondrial genome
C
Nuclear genome
D
Cytosol
Detailed Solution
Cytoplasmic male sterility (CMS) is the inability of a plant to produce functional pollen, inherited through the female parent (maternally).
It is caused by changes (rearrangements forming new open reading frames) in the mitochondrial genome, which affect the energy supply needed for pollen development.
Nuclear restorer (Rf) genes can restore fertility.
CMS is widely used in producing hybrid seeds (e.g. maize, rice, sorghum), as it removes the need for manual emasculation.
So genes for cytoplasmic male sterility are generally located in the mitochondrial genome.
It is caused by changes (rearrangements forming new open reading frames) in the mitochondrial genome, which affect the energy supply needed for pollen development.
Nuclear restorer (Rf) genes can restore fertility.
CMS is widely used in producing hybrid seeds (e.g. maize, rice, sorghum), as it removes the need for manual emasculation.
So genes for cytoplasmic male sterility are generally located in the mitochondrial genome.