254 INHERITANCE OF THE ELCAVERING TIME IN PEAS AND RICE 
mum frciivicncy class in the parent family later than in the parent fami- 
lies of J and K was not genetic but environmental, i. c. the flowering 
times of almost all individuals y;ro\vn in one row were retartled by some 
sorrounding condition, i)robably by the soil property of that row. (It is 
remarkable that the lloweriuLj times of two families, No. 68 and No. 83 
in Table 1 1, which were grown in the two rows next to the present fami- 
ly, appeared also to be retarded, esp.ecially that of No. 68, whose varia- 
tion range exceeded the variation range of G- P- in its upper end. But 
by raising offsprings of this latter family, it was found that this retard- 
ing in flowering was not genetic, see Table 17 R.). 
Table 1 6. 
M, N and 0- I'l all three raisings shown in the present table, we meet 
Avith the variation types of segregation in offsprings of a monohybrid grand- 
parent, jM'oducing three kinds of families, the earlier constant families, the 
later constant families, and the families variable within the combined range 
of the above two constants, just as we have seen in Table 13. According to 
our classification of constants, the earlier constants in this table must be of 
the early intermediate, -while the later constants must be of the i)seudo-late 
or late constant. The variation means of the later constants in all three raisings 
are very similar, but those of the earlier constants are more or less different, 
being in M the earliest, in JJ" the medium, and in 0 the latest. The order of 
difference in the variation means in the present cases corresponds with the 
order of the difference in the beginning of the range in the Fg parent families 
(see Table 11). This indicates that each of the F.^ grand-parent plants of 
the above three raisings contained a different determiner for the earlier con- 
stant character (early intermediate constant). 
Table 17. 
p. Here again we meet with the variation types of the monohybrid 
segregation. The parent family of this raising varied in a range earlier 
