92 BULLETIN 754, U. S. DEPARTMENT OF AGRICULTURE. 
pected on theory, as all of the correlations obtained could be re- 
ferred to some of the expected degrees of association. 
The first ear shown in Table XLIV, No. 1856, has an exact recip- 
rocal in ear No. 1877, and the self-pollinated colored horny parent 
is ear No. 1878, both of the same table. All three of these ears show 
practically no correlation, and the Mendelian ratios approximate 
the expected proportions. This group can be said to fulfill the ex- 
pected results where either circles 4, 7, 12, 15 are crossed with circle 
8, or where circles 4 or 7 are crossed with circle 16 (Table XLII). 
The second group consists of ear No. 1860, its exact reciprocal ear 
No. 1874, together with the self-pollinated colored horny parent ear 
No. 1875 (Table XLIV). 
TABLE XLIV.—Correlation between the endosperm texture and the aleurone 
color of 12 ears of maize; bhe progeny of the cross Dh 3350. 
CoLORED WAXY X COLORED HORNY. 
Pedigree No. of— tas 
Number of seeds. ee ng Percentage 
Self-pollinated. = wees 
Progeny ear. ele pollinis g gs & 
on BS oD 
AS melee : 
~ j=} Gs} cm 
Be iS as |e) eo eee 
1 2 3 4 5 6 q 8 9 10 11 12 18 
18565 o8ce 5 yf Ee Se cere se Ee Wey foacas 525 69 74} 170{ 212 | 0.075 |0.067 | 45.6} 25.4 
ISGO RSE S75 SSE chs ee AS TAs 649 | 119 45 | 170} 315] .653 | .039 | 44.6] 25.3 
USGL IN@MCB CE Scalboosaaacse WeyAlsoose 450 51 58} 153] 188] .034] .074 | 45.4] 24.2 
1863......... BAVA O MR AEE Sees None....| 679 72 102 | 234 271 |—.114 | .059 | 45.0] 25.6 
US Seeas6on 1S 75 Se ie SIS et Se do....| 739] 148 38 | 237] 321) .670} .031 | 51.4} 24.5 
COLORED HORNY X COLORED WAXY. 
WS7Ae tes oery: All waxy..| None....} 1861..... 81 10 11 23 37 | 0.188 |0.053 | 40.6 | 25.9 
SASH sce clecce weecce ee 1S /Deeeee 1860..... 137 25 16 46 50 -259 | .120 | 51.8} 29.9 
N87 Secs ci None...... No one....}| None....| 377 86 36 | 115 | 140] .491 | .064} 53.4] 32.4 
Nevi(codesagee All waxy..| 1878..... 1856..... 424 51 50 | 175] 148 |—.074 | .076 | 53.3} 23.9 
COLORED HorRNyY X SELF. 
S7Oe ee eeeece Self acral aces act aameceateae 716 { 104} 194 47 | 371} 0.605 |0.042 | 21.1] 41.6 
1878....... SLI BA AG OR = oB 6 So or ASE laos see aos 496 32} 104 90 | 270 |—.040 | .080 | 24.6 | 27.4 
1S 5 abedeal bod CORES SS sGosneosne Seceeeeaae 136 19 42 9 66 .5388 | .077 | 20.6 | 44.8 
Since the self-pollinated ear from the colored horny parent of the 
above reciprocals had approximately 9 colored to 7 white seeds with 
a correlation of 0.605 between C and H, it could have come only from 
circle 15 (Table XL). The expected correlation upon self-polli- 
nating circle 15 is 0.570, of which 0.605--0.04 can reasonably be con- 
sidered an approximation. 
