62 BULLETIN 754, U. S. DEPARTMENT OF AGRICULTURE. 
ears we would expect 8 to deviate in excess of three times the probable 
error. There is undoubtedly a tendency to produce an excess of 
white seeds among most of the groups expected to segregate in a 
normal Mendelian monohybrid ratio. This tendency to produce an 
excess of white seeds is more evident in the hybrid Dh 234 and its 
progeny than in the hybrid Dh 237. 
TABLE XN XVIII.—Inheritance of aleurone color in all the maize ears expected to 
have 25 per cent of the seeds white. 
| | 
| ae ot Number of seeds 
: Per- 
Nature of cross. | | D+E. oe 
Op. | Below | Be hiayaciasl white 
served.|_ ©X:_ | Total. | White.| pected | “5; ns = 
pected. | white. | “ | | 
Progeny of hybrid Dh 234: 
‘Ear DGS 10994 22. cae. Basle CE 15 3 7,252 1,888 1,813 75 3.01 26.0 
TD gre DSI e eT Hs Li Sh aes a a eg 10 5 5, 294 TESvs: S25") = Sate eae | © eee 25.0 
Progeny of hybrid Dh 237: 
mireNo 1129. eter Wei 7 3| 2,808] 740] 724 16| 1.02] 25.5 
BATENOME SO! ses aes Shee ea if 3 3, 750 905 937 — 32 1.79 | 24.1 
Progeny of Dh 234 X Dh 237: 
peaeNon 1M iG ee 18 9] 7,234] 1,833] 1,808 25| 1.00| 25.3 
Progeny of Dh 237 X Dh 234: 
arcNo. (iat. 29. he ae 9 5| 2,158 535 539| — 4 -29| - 24.7 
LFA Da NICaSE IS 2 be oe a al oe 8 22 7 9,420 | 2,402 | 2,355 47 1. 66 25.5 
Second generation: 
Eby brid Dir 2342 So eis Bee 46 13 |] 26,383 6,807} 6,596 211 4.45 25.8 
laly iol Dina y Ga ae eee eee 29 11 16, 947 | 4,307 | 4,237 70 1.84 25.4 
Potalicses ler tec | 163 59 [sabe 
81, 336 | 20, 740 | 20, 334 
406 | 4.88 
One explanation of this deviation would be that through mistakes 
in classification colored seeds were being included among the white. 
If this were the case, the white seeds planted and self-pollinated 
would be expected to result in some ears having colored seeds. The 
deviation is so small, however, that only one such ear-could be ex- | 
pected in growing and self-pollinating 200 of the so-called white | 
seeds. | 
If seeds bearing color had been classified as white, crosses between 
plants grown from the white seeds with plants grown from the 
colored seeds would be expected to result in some ears with a mono- 
hybrid ratio of white to colored seeds, instead of equal numbers of 
white and colored seeds. Several hundred ears representing the above 
crosses were obtained without finding any ears with a monohybrid 
ratio. 
The possibility, then, that some of the seeds classified as white 
were in reality colored is remote. In hybrids involving endosperm 
texture the significant deviations observed have been with the reces- 
sive class below the expected (5, 7, and 8). 
This significant departure above the expected number of recessives 
is not supported by the remainder of the progeny expected by the 
nature of the crosses to have equal numbers of white and colored 
seeds (Table X XIX). 
