What is viability?

What is a protoplast? Which chemical stain is used to test its viability?

Discuss about seed viability.

In Oxadis, the seed viability ranges from :

After pollination viability of pollen grains of wheat/ rice is about

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for bredding programmes ?

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for bredding programmes ?

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for bredding programmes ?

Seed having the longest viability is