An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Leaf from resistant rice variety CO39 showing ability to resist formation of lesions when the Magnaporthe grisea strain carries the AVR1-CO39 avirulence gene. The dark spots are areas where plant cells have died to abort rice blast infections.