The son of Senegal's powerful former president has been convicted on corruption charges and sentenced to six years in prison and fined nearly $230 million.

Karim Wade, who served in the government of his father Abdoulaye Wade, was charged with illegally accumulating a fortune of at least $200 million.

Karim's supporters say the trial is part of a political vendetta being waged by President Macky Sall against his old rival.

On Saturday, Wade's Senegalese Democratic Party chose Karim Wade as their candidate for the next presidential elections. Karim Wade was soundly beaten when he ran in municipal elections in 2009.

The next election is expected in 2017, pending a referendum to reduce the presidential term from seven to five years.