INHERITANCE OF WAXY ENDOSPERM IN MAIZE. 89 
COMPOSITION IN THE THIRD GENERATION OF THE HYBRID DH 234. 
Three ears were selected from the progeny of hybrid Dh 234 and 
planted the following season. Two of these ears are Nos. 1099 and 
1111, in Table XVIII. The third ear was a cross between the two 
hybrids Dh 234 and Dh 287, and since it was all colored it does not 
appear in Table XVIII. The progeny of this last-mentioned ear 
are considered later in connection with two similar ears borne on 
plants of the hybrid Dh 237. The ear numbered 1099 was a cross 
between two sister plants and had almost exactly the expected per- 
centage of white seeds. A self-pollinated ear secured from the male 
parent also was a close approximation to the expected 25 per cent. 
The ear numbered 1111 in Table XVIII was the result of self- 
pollination. This ear also had white seeds, closely approximating 25 
per cent. There were four classes of seeds on both the ears Nos. 
1099 and 1111. These four classes were planted separately. An ex- 
amination of the data failed to show any significant differences in 
the behavior of aleurone color due to the texture of the endosperm, 
making it possible to disregard the endosperm texture in analyzing 
the aleurone colors. 
The progeny from the two ears behaved practically alike, no sig- 
nificant differences being found. Hand-pollinated ears to the num- 
ber of 85 that had both colored and white seeds were obtained, 50 
ears being from the progeny of ear No. 1099 and 35 ears from the 
progeny of ear No. 1111. 
WHITE X COLORED. 
Twenty-nine of the 85 ears obtained from the progeny of ears Nos. 
1099 and 1111 were the result of crossing plants grown from the 
white seeds with plants grown from the colored seeds of the same 
ears (Table XVIII). The table is so arranged that the progeny 
from each of the four groups of each ear may be examined separately, 
if desired. In column 1 is found the number of the progeny ear 
from which the plants that produced the ears whose pedigree num- 
bers are there given were grown. In this same column are also found 
the symbol letters for the characters. Thus the first six ears in Table 
XVIII, which are separated from the remaining three groups by a 
total, are the result of crossing plants grown from the white waxy 
(WX) seeds with plants grown from the colored horny (CZ) seeds 
of ear No. 1099. The symbols mentioned first indicate the character 
of the seeds from which the female parents were grown. The ex- 
pected proportion of white seeds is 50 per cent. The 29 ears had 
11,949 seeds with 47.2 per cent white, the deviation being more than 
9.4 times the probable error. A deviation of this magnitude would 
not be expected to occur as the result of chance more than once in 
over a billion times. 
