The cross of an inbreed line with an open pollinated variety is known as

The cross of an inbred line with an open pollinated variety is known as the Top cross.
Top cross- means the first generation of a cross between an open-pollinated variety and an inbred line, a foundation backcross, or a foundation single cross.
In the top cross, crosses are made between inbreds and either a tester or an open-pollinated variety. This is also known as an inbred-variety cross.