80 Studies of Inheritaiwe in the Japanese Convolvulus 



(22 — 3) X (22 — 4) : The genotypic constitution of these hybrids is 

 very various, as will be seen in the above table. If we classify them 

 according to leaf- and flower-colour there should be 3 green-red, 1 green- 

 white, 3 yellow-red, and 1 yellow-white. Now according to this expec- 

 tation the deviation and the standard error are ± 2-250 and ± 1-985, 

 respectively, in green plants, and they are ± 4-500 and f 2-371, respec- 

 tively, in yellow ones. Thus the results agree almost entirely with our 

 expectation. 



(22 — 3) X (22 — 11): The genotypic constitution is here also various, 

 as seen in the above Table. The ratio of red and white should be 3 : 1 , 

 and the experimental result 7 : 2 shews that our expectation is almost 

 perfectly fulfilled. 



(31 — 1) X (31 — 5) : As the hybrids have the constitution GgDD and 

 ggDD, the ratio of green-red and yellow-red should be 1:1, and the 

 plants really obtained are 27 and 22 : thus here also our expectation has 

 been fairly well fulfilled. 



(31— 10) X (31— 9) : As the hybrids have the constitution GGDD 

 and GgDD, all jDlants should be green and the ratio of red and dark-red 

 1 : 1, and we have had 25 red and 24 dark-red, the results being thus 

 fairly well in accordance with our expectation. 



(44—2) X (44—10) : The hybrids have the constitution GgDD and 

 ggDD, so that green-red and yellow-red should be in the ratio 1 : 1. As, 

 however, the plants of these two kinds are 26 and 44, respectively, their 

 ratio seems to fit somewhat badly with the expectation, but the deviation 



