Replying to a query from reporters here, he said Mulayam had passed on the "fruit of his life's struggle" to his son Akhilesh and he could never go "against" him.
Singh said every father had the right to "admonish" his son, adding that his statement should not be misinterpreted.
The senior leader refused to comment on the Quami Ekta Dal's (QED) merger with the SP, saying it was a decision of the party high-command.