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E. J. WELLHAUSEN 



genitors of the race Celaya. The other, C 126-5, has a fairly short ear and a 

 high row number and apparently is a segregant in the direction of Tuxpeno 

 which is the other probable progenitor of the race Celaya. 



If selection for ear type, using Celaya as the ideal, had been a factor in the 

 development of inbred lines, then both C 110-3 and C 126-5 probably would 

 have been discarded. Selection for type may be a mistake in those varieties 



i ' 





FiG. 27.5— Typical ears of the two inbreds C 110-3 {left) and C 126-5 {right). Both are from 

 the race Celaya, which probably originated from the hybridization of Tabloncillo and 

 Tuxpeiio. C 110-3 phenotypically appears to be a segregant in the direction of Tabloncillo 

 and C 126-5 appears to be a segregant in the direction of the tropical many-rowed cylindri- 

 cal dent Tuxpefio. 



which apparently have not reached equilibrium, or in which segregants close- 

 ly resembling one putative parent or other appear. It may be an especially 

 bad practice if the lines from the same variety are to be recombined into 

 hybrids. In the recombination of lines from the same variety, it remains to 

 be seen whether good hybrids can be more readily made by a recombination 

 of lines which phenotypically are opposite extremes, or from those lines 

 which resemble more closely the type of the variety from which they came. 

 Probably both types are needed. 



Hybrids and synthetics developed from Celaya lines were well adapted 

 to regions with supplemental irrigation, and to certain of the regions in Zone 



