Heat oven to 375 degrees. Grease muffin cups. In large bowl, combine flours, baking powder, salt and sugar. Stir to blend. In medium bowl, beat together egg, yogurt, oil and rind. Blend yogurt mixture into flour mixture. Fold in berries. Fill muffin cups 2/3 full and bake 20 - 30 minutes depending on muffin size. Bake until golden.