INHERITANCE OF WAXY ENDOSPERM IN MAIZE. 05 
The hybrid Dh 237 seems to be much more regular in behavior, at 
least as regards the proportions of white and colored seeds, though 
this hybrid produced ears segregating in a dihybrid ratio, as well as 
ears approximating a monohybrid ratio; usually in dealing with two 
color factors it is found that the inheritance of color is most irregular, 
the ratios often exhibiting a great range of variation. 
Fifteen ears that were assumed to be segregating approximately 
9 colored to 7 white are shown in Table XXX. These 15 ears had 
6,519 seeds with 43.0 per cent white, the deviation of 0.75 per cent 
being 1.55 times the probable error and no larger ae can be rea- 
sonably ascribed to chance. 
TABLE XXX.—Inheritance of aleurone color in all the maize ears expected to 
have 43.75 per cent of the seeds white. 
Number of Number of seeds. 
ears. 
Per- 
Nature of cross. D-+E, | centage 
OB rl eceor Ex: || Devia- white 
eee X- Total. | White.| pected tiGn , 
pected. white. i 
Hybrid Dh 237, Algeria x Chinese 
variety: 
Recand fan eas actaciteaanes 4 2 2,477'| 1,072] 1,083 —l1 0. 66 43.3 
Hybrid Dh 234 x Dh 237: 
rroreny ofear Noy tion. 22 )2-7- 6 3 2,020 879 854 25 1.65 43.5 
Hybrid Dh 237 X Dh 234: 
Progeny of ear No. 1131. ......-. MS acciescice 36 18 15 3 1.50 50.0 
Progeny of ear No, 1134...-..-..-.. 4 3 1, 986 839 868 —29 1.95 42.2 
TaN ET RN Me GR 15 8 6,519 | 2,808 | 2,850 —42 1.55 43.0 
CORRELATION BETWEEN ENDOSPERM TEXTURE AND 
ALEURONE COLOR. 
In several hundred crosses between American varieties of maize 
with horny endosperm and the Chinese variety with waxy endo- 
sperm a correlation has always been found to exist between the 
texture of the endosperm and the color of the aleurone. The results 
of a number of these crosses have been previously reported (7 and 4). 
The study of correlation which had been relegated to the back- 
ground upon the appearance of Mendelism with its theory of inde- 
pendent units received fresh impetus with the announcement of 
Bateson and Punnett that the mathematical regularity common in 
Mendelism was also to be found in the relationships between char- 
acters. These authors found that correlations were gametic, the 
parental combinations being found to occur in the gametes more 
frequently together than separated. To account for this difference 
in the gametic ratios they have assumed that the cells bearing the 
parental characters divide or reduplicate more frequently than the 
cells bearing the characters derived from different parents. For 
89356°—19——_5 
