Rogers Communications Inc. yesterday announced the election of Isabelle Marcoux to its board of directors. Marcoux is vice-chair and VP of corporate development of Transcontinental Inc. She has a bachelor of economics and a degree in law from McGill University. Last year she was hungered as one of Canada’s Top 40 Under 40.    "We are pleased to welcome Isabelle to the Rogers’ Board of Directors," said Alan Horn, Rogers’ board chair. "Isabelle’s background and extensive experience as an executive and as a director will be an asset to our Board."