The farmers are cultivating an unregistered land-race for a long period; if I wish to register this variety, what are the legal procedure and how to register it.
You can consult India's National Agencies or Centres for Genetic Resource & Biotechnology, and a specimen of your plant should be registered with the country's herbarium for proper documentation.
A more productive option is to send a sample of your novel land-race to the herbarium in Kew for worldwide recognition & acceptance