is Hybrid rice?
Hybrid rice is
the commercial rice crop from F1 seeds of cross between two
genetically dissimilar parents. Good rice hybrids have potential
of yielding 15-20% more than the best inbred variety grown
under similar conditions. To exploit the benefits of hybrid
rice, farmers have to buy fresh seeds every cropping season
We need to go for hybrid
rice because yield levels of semi-dwarf varieties of the green revolution
era have plateaued. more and more rice to be produced on less land
and with less inputs. demand for rice is rapidly increasing with
the increase in population, especially in less developed countries.
rice hybrids have shown 15-20% higher yield potential than inbred
rice varieties under farmers' field conditions. hybrids have shown
their ability to perform better under adverse conditions of drought
How is Hybrid
Rice is a strictly
self-pollinated crop. Therefore, for developing commercial rice
hybrids, use of a male sterility is essential. Male sterility by
genetic or non-genetic means makes the pollen unviable and such
rice spike-lets are incapable of setting seeds through selfing.
Thus, a male sterile line can be used as female parent of a hybrid.
A male sterile line, when grown side with a pollen parent in an
isolated plot, can produce a bulk quantity of hybrid seed due to
cross pollination with the adjoining fertile pollen parent. The
seed set on male sterile plant is the hybrid seed which is used
for growing the commercial hybrid crop.