H. MiYAZAWA 81 



and thr sUiidarH frmr Ikmii^ i !MMH) and ± 4ls;}, ri!»i>ectivt'ly, the 

 rv^ults may bo said U) Ih' in acconlancc with the t'XiK'ctation. 



(55— 15) X (38 — 1): Ah thi« hybridM havo thc^ conMlitutioii GgDd 

 and Qgdd, then' should he I gn*cii-nMl ami 1 ^nM-ii-whitc, and wr havt* 

 4grt*en-re<i and 7 groon-whito in n^ality. Thtmgh the empirical innnbtTs 

 are very small, the deviation and the standanl ermr are ± 1 ^(H) and 

 ± 1-658, re«jK»ctively, an<l our (>x|MH-tation is fulHlh'd. 



(56—1) X (38—1): As tho hybrids have thr constitution ggDd and 

 ggdd all i)lanUs should hv yellow, and the ratio of red and whit<' 1:1, 

 in fiict we have 27 yellow-ri'd and 21 ydlow-white. 



(59_10) X (16—9): The hybrids have always the constitution ggDd, 

 and we have 89 yellow-red. 



A X (16 — 4) : The hybrids have the constitution GgDd, and we have 

 10 green-red. 



A X (16 — 9): The hybrids have the constitution ggDd, and wv have 

 9 yellow-red. 



A X (88 — 1): As the hybrids have the constitution ggDd and ggdd, 

 all plants should be yellow and the ratio of red and white 1:1, indeed 

 we have 6 yellow-red and 8 yellow-white. 



(32 — 1) X B: All hybrids have the constitution GGDd, and we 

 have obtained 11 green-dark-red. 



When we examine all the above results we find some cases which 

 seem to fit badly with our theoretical expectation, though all these lie 

 within the range allowed by the theory, and such cases are no doubt due 

 to the small number of individuals included in each family. It may be 

 noticed moreover that, on the one hand, all kinds of plants which are 

 theoretically expected to occur in any family were found there to appear; 

 and on the other, in no single family plants of such kinds which should 

 not occur there accoi-ding to our theoretical expectation were ever found 

 to appear. 



Summary. 



1. The green colour of leaves is dominant to yellow, and the segre- 

 gation in F2 takes place accoixling to the 3 : 1 ratio. 



2. The factor producing the " hukurin " is present in the parent 

 with white flowers. This condition is dominant to full colour and in F., 

 the segregation occui-s according to the 3 : 1 ratio. 



3. The results mentioned in 1 and 2 agree with those obtained by 

 Takezaki. 



