Cut a piece of parchment paper to size of loaf pan, place in bottom of loaf and grease pan well.
In a medium sized mixing bowl, sift or whisk the 2 cups all-purpose flour, 2 ½ teaspoons baking powder, ½ teaspoon baking soda and ½ teaspoon salt.
In a separate mixing bowl, combine the 1 cup granulated sugar, 1 large egg, c3 Tablespoons canola oil, 2/3 cup orange juice and 2 teaspoons fresh orange zest.
Gently fold the dry ingredients into the wet ingredients and mix only until just combined. Fold in 1 1/3 cup fresh or frozen blueberries.
Pour batter into the prepared loaf pan. Bake at 350°F° for one hour, or until a toothpick inserted in the center of the loaf comes out clean.
Allow loaf to cool in pan 10-15 minutes before turning out onto a wire rack to cool completely; remove parchment paper from bottom of loaf when cool.
Combine all ingredients for glaze (1 ¼ cup powdered sugar, 2-3 Tablespoons orange juice,½ teaspoon orange zest) and drizzle on top of loaf; allow glaze to set before slicing.