3. Among the seed stocks belonging to the late Dr. A. C. Fraser were several noted as "segregating for w and l." Seed from a few of these cultures was planted in the greenhouse for student use and they were found, without exception, to be segregating for a dwarf as well as for w or l. The dwarf was later identified as pigmy and the white seedling as w1. Lebedeff, News Letter of March 6, 1938, reported 4.8% recombination between w and py, assuming one w py, none of which were actually found. Among 413 seedlings we likewise found no w py plants, further indicating the close linkage between these loci.

  ++ + py w + w py Total
+  py 212 98 103 0 413
w  +  
  w - py 10.1 % (assuming l w py)

The origin of the luteus in this material is unknown. There is no record of outcrossing and so far as we can determine, it first appeared in S4 of the cross +/w × py/py. Whatever luteus this may be, it is also linked with pigmy, as indicated by the following data:

  ++ + py l + l py Total
+  py 635 253 292 2 1182
l  +  
  lx - py 9.2 %  

E. T. Bullard and R. L. Cushing