Among the seed stocks belonging to the late Dr. A. C. Fraser were several noted as segregating for w and l

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 +
		l_x - py	9.2 %

E. T. Bullard and R. L. Cushing