376 
LOCK : STUDIES IN PLANT BREEDING 
A summary of the plants raised in F.. follows, together with the 
total number of seeds which they produced of either colour :— 
Number. 
Seeds Sown. 
Nature 
of Plants : F . 
Seeds F* 
D. 
DR. 
R. 
Y. 
G. Bad. 
435.1 
2 
12y 
1 
22 
— 
— 
? 9 
— 
10 
244 
96 
62 
9 9 
6g 
6 
— 
171 
2 
435.1 
.3 
24y 
4 
185 
— ' 
30 
9 9 
. 
17 
346 
138 
13 
9 9 
12g 
. 
11 
mm 
307 
8 
435.3. 
.2 
12y 
. 
10 
199 
75 
21 
9 9 
6g 
3 
— 
71 
5 
435.4. 
,1 
12y 
9 
224 
(7)t 
12 
435.4 
. 2 
12y 
3 
91 
— 
9 9 
/ 
121 
39 
— 
9 9 
6g 
4 
■ _ 
126 
9 
435.4 
.3 
20y 
4 
127 
9 9 
11 
25 
79 
■ 
435.5 
.1 
20g 
12y 
4 
7 
17 
117 
170 
469 
51 
11 
4 
9 
9 9 
6g 
6 
— 
181 
— 
The above table repeats in rather greater detail the information 
given previously in Part I., page 309. 
Twenty-five green and 25 yellow seeds were taken at random from 
a large fresh sample of F 4 —offspring of heterozygotes —and were 
examined closely after removal of the testa. The green seeds were 
without exception of a deeper and more vivid green than the greenest 
of the 3 peas in Weldon’s Fig. 1,J being indeed quite green. The 
yellow seeds were all as yellow as those in Fig. 6, but of a darker shade 
—almost exactly the shade of the yellow ink used for printing the 
figure. It is to be noticed that all these seeds were produced 
upon plants of much more vigorous and healthy appearance than 
those of F 1 , a fact which suggests that the relatively “ bad ” results 
obtained in the earlier generations may have been due to the bad 
conditions of growth, or want of acclimatization. 
* Nearly all the seeds set down in this column had been attacked by a 
caterpillar, causing damage which rendered the discrimination of their colour 
a matter of uncertainty. 
f Not fully ripe. 
I Biometrica, I., 1902, Pt. II. 
