APfi 29 1924 
ON THE INHERITANCE OF THE FLOWERING 
TIME IN PEAS AND RICE. 
By 
YUZO HoshinO, Nogakushi. 
INTRODUCTION. 
The multiple-fiictor hypothesis, which was proposed by Nilsson-Ehle 
(1908) for the interpretation of the inheritance of quantitative and physiologi- 
cal characters and carried further by Lang (igri), seems to be gaining a 
steady acceptance in the scientific world. The investigators who have accept- 
ed the above hypothesis su[)port their views by the facts that the is inter- 
mediate between parents; that the F.^ shows a wider variation than the F-^, 
mostly varying within a combined range of the parents, but some producing 
transgressive variation; while in the Fg, some vary lilce the F.,, others, in 
several grades of variation ranges. The majority of the investigators, how- 
ever, do not explain the exact number and nature of the factors which may 
concern the heredity of the characters. 
So far as the author knows, there are only two works which touch on 
the latter subject. The one is Tschermak's (191 i) and the other is Pun- 
net and Bailey's (1914). Tschermak proposed, for the interpretation of 
his experimental results on the inheritance of the flowering time in peas, two 
alleromorpuic pairs ; Punnet and }5ailey, for the interpretation of their ex- 
periments on the inheritance of weight in poultry, four alleromorphic pairs. 
If we examine their work carefully, however, we can not readily accept their 
interpretations. We shall not enter here into a minute discussion of the sub- 
ject, but let us simply make the following remarks. In the work of Tscher- 
[Jour. of the College of Agr., Tohoku Imp. Univ., Sapporo, Vol. VI, Pt. 9, November, 1915] 
