Lingayats and Vokkaligas, constituting about 17 percent and 15 percent of the state's 65 million population respectively, have dominated Karnataka politics for decades.
Riding on the “betrayal” platform Yeddyurappa led the BJP to win 110 seats in the May 2008 assembly polls and formed the first BJP government in the state with the help of six Independents.
However, his tenure was marked by many other firsts - all the wrong ones - and he was forced to quit as chief minister in July last year after the Lokayuta (ombudsman) N. Santosh Hegde - indicted him for bribery in a massive illegal iron ore mining scam.