To make strawberry puree, place strainer over medium bowl; pour strawberries and syrup into strainer. Press mixture with back of spoon through strainer to remove seeds; discard seeds.
In 3-quart nonmetal bowl or pitcher, mix strawberry puree, fruit juice concentrate and wine.
Just before serving, stir in carbonated beverage. Serve in wine glasses over ice. Garnish each serving with strawberry half.