Which grain is not typically used in the production of blended whiskeys?

Blended whiskeys are made from a combination of different spirits, which can include various grains. Typically, the grains used in the production of blended whiskeys are corn, rye, and barley, each contributing unique flavors and characteristics to the final product.

Corn is often the dominant grain in many whiskey formulas, particularly in American whiskey, while rye adds a spiciness that is distinctive in certain blends. Barley is essential for producing malt whiskey, which is sometimes included in blends.

Wheat, while it can be used in some whiskey recipes, particularly in softer styles or for specific types like wheat whiskey, is not a common grain in traditional blended whiskeys. Its use is less prevalent compared to the other grains listed, making it the correct answer for which grain is not typically associated with the production of blended whiskeys.