INHERITANCE OF WAXY ENDOSPERM IN MAIZE. 89 
When the colored horny plants are crossed with the colored waxy 
plants, 6 of the 16 zygotic combinations are expected to exhibit all 
4 classes, and since there are three classes of waxy, 14 combinations 
result, as shown in Table XLII. Of these 14 ears, 12 are expected to 
have colored and white in the proportion of 3 to 1 and horny and 
waxy seeds in equal numbers, while the remaining 2 ears are expected 
to have colored and white seeds in the proportion of 9 to 7, with equal 
numbers of waxy and horny seeds. The 14 classes of ears are ex- 
pected to be divided into five groups, with different degrees of cor- 
relation, as follows: Twenty ears with no correlation, 27 ears with 
a correlation of 0.615 between colored and horny, 9 with a correla- 
tion of 0.270 between colored and horny, 9 with a correlation of 0.615 
between colored and waxy, 3 with a correlation of 0.270 between col- 
ored and waxy. The classes of zygotes are represented in Table XL. 
TABLE XL.—Classes of zygotes on the all-colored ears resulting from crossing 
the hybrids Dh 234 and Dh 237. 
Hybrid Dh 234. 
Gametes. 
CRE. CRh. Cr. Crh 
RR Ni pied en ban atinn, Okan Oit he@wuilh @ 
SMe cc MC we a gL ©) @ 
B Gif [EL we ae Se PSE pe a PR ca in I Q) @ ® 
4) OL). aoe SAGE EC OE SRE SoG SRE c ECE eR CRE ACeee ona raaEn (3) @) 
The italic letters in the column boxes of the table represent the 
gametic combinations formed by the hybrid Dh 234, and those in the 
left-hand column represent the gametic combinations formed by the 
hybrid Dh 237. The figures 3, 1, 1, and 3 preceding the italic letters 
in the left-hand column indicate the proportion in which each of 
these gametic combinations are formed in the hybrid Dh 237. 
Owing to the reduplication of certain combinations, resulting in an 
association of the color factor C’ and the endosperm texture //, there 
was no reduplication in the hybrid Dh 234. 
Each circle in the table represents one of 16 zygotic combinations 
formed by crossing the two hybrids Dh 234 and Dh 237. The 
circles are numbered for convenience of reference. Thus, owing to 
the reduplication, the zygotic combinations represented by circles 
1, 2, 3, and 4 are present on the ears three times as often as the com- 
binations represented by circles 5, 6, 7, and 8. It must be borne in 
mind that two factors are required to produce colored seeds; these 
factors are represented by the letters ( and &. 'The endosperm tex- 
tures horny and waxy are represented by the letters 7 and h. 
