Newbie question : How to specify relationship between tables ?

[eluser]Unknown[/eluser]
Hello,

Sorry to ask a so stupid question but ... :-)
I have to tables :
Country :
id
country_name

Wine :
id
wine_name
country

I want to have a drop down list when i add a new wine in my database with all the countries.

Can someone help me ?
Thanks.

Dominique.