Performance of a double cross hybrid can be predicted by taking the average performance of

The performance of a double cross hybrid can be predicted by taking the average performance of the inbreds involved in marking the double cross.
Double cross hybrids are the product of crossing two distinct single crosses.
The name of Donald F. Jones is probably most commonly associated with the double-cross technique, the method that made hybrid corn practical.
The performance of double-cross hybrids was predicted based on the performance of single and three-way crosses.