Enumeration of tilings of quartered Aztec rectangles

We generalize a theorem of W. Jockusch and J. Propp on quartered Aztec diamonds by enumerating the tilings of quartered Aztec rectangles. We use subgraph replacement method to transform the dual graph of a quartered Aztec rectangle to the dual graph of a quartered lozenge hexagon, and then use Lindstr"{o}m-Gessel-Viennot methodology to find the number of tilings of a quartered lozenge hexagon.