INHERITANCE OF ENDOSPERM COLOR IN MAIZE 
401 
fication and its F3 progeny. In some cases a photographic blue ray 
screen was used, 
Fi Generation Progeny 
CaHfornia Golden Pop pollinated by Zea Caragua gave uniformly 
white endosperm grains with perhaps the very faintest suggestion of 
yellow.^ This cross was repeated six times with similar results. The 
reciprocal cross has not yet been obtained. Crosses of Golden Pop 
pollinated with white endosperm Hopi gave similar results. 
F2 Generation 
Three independent classifications of the F2 progeny from California 
Golden Pop X Zea Caragua are given in Table 3. The first three 
ears were classified with the aid of a photographic blue ray screen. 
Table 3 
Endosperm Color of F2 Progeny of (Z 14XZ 21) 
Progeny No. 
ist Classif. 
2d Classif. 
3d Classif. 
Total 
Grains 
White 
Yellow 
White 
Yellow 
White 
Yellow 
(Z 14XZ 21)— I 
254 
82 
Practi 
cally 
336 
264 
108 
the same 
372 
( " )— 3 
285 
89 
374 
( " " )-4^ 
257 
79 
235 
lOI 
225 
III 
336 
( " " )— 5^ 
346 
73 
319 
100 
267 
152 
419 
( " " )— 64 
338 
98 
358 
79 
340 
96 
436 
346 
77 
316 
109 
259 
166 
425 
( " " )— 84 
248 
70 
235 
82 
214 
104 
318 
( " " )— 25a 
350 
146 
311 
185 
354 
142 
496 
( " " )-25h 
358 
129 
350 
137 
339 
148 
487 
( " " ) — 26a 
422 
126 
420 
128 
410 
138 
548 
( " " )— 26&5 
494 
109 
483 
121 
472 
132 
604 
( " " )— 28 
336 
91 
318 
109 
315 
112 
427 
( " " ) — 2gb 
478 
131 
460 
149 
438 
171 
609 
( " " )— 30 
390 
143 
406 
127 
388 
145 
533 
( " " )— 31 
373 
54 
313 
114 
316 
III 
427 
( " " )— 32 
332 
104 
332 
104 
331 
105 
436 
( " " )— 33 
427 
73 
371 
129 
386 
114 
500 
( " " )— 34a 
221 
52 
209 
64 
211 
62 
273 
( " )— 35 
309 
93 
295 
107 
280 
122 
402 
( " " )-36 
375 
95 
379 
91 
369 
lOI 
470 
( " " )— 37 
338 
97 
328 
107 
282 
153 
435 
3 The Fi white endosperm of these seeds is indistinguishable from that of seeds 
of several of the well known smooth white seeded varieties of pop-corn, when com- 
pared with them. From data on non-guarded crosses referred to later, the recip- 
rocal cross probably gives the same results, except the endosperm is opaque white 
instead of translucent white. 
4 Ears obtained from unbagged Fi plants allowed to intercross with other Fis of 
similar pedigree. 
^ One unclassified. 
