PLATE I 
A. —Showing the difference in growth habit between Kanred winter wheat (left) 
and Marquis spring wheat (right) at harvest time, when both are spring sown. 
B. —Showing the segregation for time of heading in the F3 plants from the 
MarquisXKanred cross, when seed from Fj heading classes was spring -sown. Left, 
Marquis; center, Fj hybrids, arranged in order of heading dates, from left to right; 
right, Kanred. 
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