INHERITANCE OF WAXY ENDOSPERM IN MAIZE. 8l 
on a 3-1 coupling and the 0.96 expected on a 7-1 coupling, though it 
is a closer approximation of the latter. The deviation of 0.06+-0.013 
from the 7-1 coupling is, however, 4.6 times the probable error. 
Ear No. 1764 has a reciprocal ear in No. 1799. This ear had a 
correlation of 0.7, a deviation of 0.10.03 from the expected 0.8, and 
differing from No. 1764 by 0.210.048, which is almost 4.5 times 
the probable error. A self-pollinated ear was obtained from the 
same plant that bore ear No. 1799. This self-pollinated ear is No. 
1800 (Table XXXVIII). The correlation of 0.834 observed on this 
ear is higher than the expected 0.766. The deviation of 0.068--0.02. 
from 0.766 is 3.4 times the probable error, which is rather large to 
be attributed to chance. The relations of these ears are shown in 
figure 14. 
Fic. 14.—Diagram showing the relations of ears Nos. 1764, 1799, and 1800. 
Since the female parent of ear No. 1764 was homozygous for waxy 
endosperm texture, the correlation of 0.91 represents the reduplica- 
tion in the gametes of the male parent. This reduplication is higher 
than the expected, the degree of correlation indicating the reduplica- 
tion to be closer to a 7-1 than a 3-1; in reality the series very closely 
approximates 4.5-1. The reciprocal ear of No. 1764—No. 1799—has 
a lower reduplication series than 3-1-1-3, being in reality 2.4-1. 
The correlation of 0.834 on ear No. 1800, the self-pollinated ear of 
the heterozygous colored horny parent, indicates a gametic series in- 
termediate between the 4.5-1 and 2.4-1. 
The expected correlation in self-pollinating a plant with a male 
gametic series of 203-44-45-206 and a female gametic series of 
168-71-80-191 is 0.788. Ear No. 1800, which represents such a self- 
pollinated ear, has a correlation of 0.834-+0.02, the deviation of 0.046 
from 0.788 being no larger than is to be expected. 
89356°—19——-6 
