80 GENETICS IN RELATION TO AGRICULTURE 
the close correspondence to expectation can be seen all along the line. | 
Moreover, these families represent crosses between many different 
starchy and sweet races, so that the observations are not based on a 
single hybrid. The deviation of the total ratio from the 3:1 ratio is 
very slight and falls far within the probable error set by mathematical 
conditions. 
Tasue VIII. —Summary oF INVESTIGATIONS ON INHERITANCE OF COTYLEDON COLORIN 
Pisum (After Johannsen) 
| 
Investigator Yellow Green | Total Ratio per 4 Probable errors 
| Le ES Neon sere 
Mendel, 1865...) 6,022. 2,001 8,023 3.0024:0.9976, +0.0130 
Correns, 1900..| 1,304 | 453 1,847 |3.0189 0.9811) +0.0272 
Tschermak,1900| 3,580 1,190 4,770 |3.0021:0.9979, +0.0169 
Hurst, 1904....] 1,310 445 1,755 2.9858 :1.0142) +0.0279 
Bateson, 1905..| 11,902 3,903 15,806 |3.0123 :0.9877/ +0.0093 
Lock, 1905.....) 1,438 514 | 1,952 [2.9467 :1.0533| +0. 0264 
Darbishire, 1909} 109,060 36,186 | 145,246 3.0035 :0.9965/ +0. 0030 
Totals....... 134,707 | 44,692 | 179,399 3.0035 :0.9965 +0.0028 
Taste IX.—SrGReGATION OF STARCHY vs. Swept ENpospermM In Maize 
Family No. | Starchy | Sweet | Total | Ratio 
(15 & 54) | 1,746 623 | 2,369 2.948 :1.052 
(15 xX 54) — 2 2,293 | 728 | 3,021 (3.036 :0.964 
(24 x 54) 2,288 | 801 3,089 2.963 :1.037 
(24 X 54) —1 ! 771 | 269 | 1,040 2.965 :1.035 
(5 X 18) | 1,509 | 492 | 2,001 3.017 :0.983 
(11 x 18) 873 | 319 1,192 2.930 :1.070 
(17 x 54) - 1 328 | 102 430 3.051 :0.949 
(18 X 58) —1 332 | 102 434 3.060 :0.940 
(7 X 54) 872 268 1,140 3.060 :0.940 
(8 X 54) 1,505 530 | 2,035 2.958 :1.042 
(8 X 54) -—1 | 3,524 1,163 | 4,687 3.008 :0.992 
(8x 54)-5 | 2,190 725 | 2,915 3.005 :0.995 
(OE 70) | 783 | 230 1,013 3.092 :0.908 
(19 xX #7) -—5 304 109 413 2.944 :1.056 
(19 x =8) 1,813 | 602 2,415 3.003 :0.997 
(60 — 5 X 54) 1,150 379 1,529 3.009 :0.991 
(60 — 3 X 54) | 799 | 267 1,066 2.998 : 1.002 
(60 — 8 X 54) | 451 | 13 589 3.063 :0.937 
| | a 
sLotalswer aac 7 23,531 | 7,847 | 31,378 2.9997 : 1.0003 
Probable error | +0.0062 
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