I was looking for a simple list and I found something even best. My source:Source http://en.wikipedia.org/wiki/2014_national_road_cycling_championships
It's obvious - and sad - the difference between Men and Women: in many countries female championships simply didn't take place...
Together with Tour de Suisse and Dauphiné, Nationals are a last test for the Tour de France teams' selections and a special goal for almost all riders. In some countries Nationals are very hard and competitive races, with tons of high level riders fighting for the jersey. In others riders are few and even fewer ride for important teams so things are a bit different. Reading the results however you can see that not always the top level riders win.
Here there is a very complete review: http://cyclingtips.com.au/2014/06/national-championships-round-up-2/
About the Tour de France I want to point out a few things: first of all, ok, Nationals are a last test but normally the Tour squad is more or less decided way earlier, they did specific training camp and recons of the most important stages so... well... it's weird when a rider previously selected get excluded because of the Nationals' result. I'm talking about David Millar of course. He didn't deserve that. It was going to be his last Tour and his last season. For him and for his fans, it isn't fair. Especially when the Tour starts from England.
And here I come to the second point: British Cycling did a lot to develop top British riders, now the Tour starts from England and the most of them are not selected: "I was selected for TdF last week, then they pulled me last night." Millar wrote on Twitter "Wiggo, Dowsett, Pete, Swifty, fancy a city break? I hear York's nice." "Disappointing to be seeing British riders not named for the Tour and even being pulled from line ups so close to the race."
Something wrong here.
Elite Men RR and TT
Elite Women RR and TT