384 
LOCK : STUDIES IN PLANT BREEDING 
of Telephone, as regards the form of both the seeds and the foliage, 
and had wider pods. 42 : 1318= 3 2 : 1 ; so that it appears likely that 
there is Mendelian segregation of these characters, but that the form 
of seeds and of foliage and the width of pod are all to some extent 
correlated. It is possible that in the case of the reciprocal cross a 
similar phenomenon may have been overlooked owing to the bad 
conditions under which the corresponding generation was grown. 
D .—Further Generations. 
These were grown in the first place to test the accuracy of the 
sampling in F 2 , and, this being found accurate, to test the conformity 
to Mendel’s law in these later generations. It was also hoped to 
obtain improved strains by the selection of the parents yielding the 
largest crops and the finest seeds. 
1. Native pea No. 1 x Telephone .—The following table shows how 
far the constitution of the F 2 seeds could be determined on examin¬ 
ing their offspring in F 3 :— 
Number. 
Character 
lof FaSeeds. 
F 3 
Seeds born on F 2 Plants. 
Constitution 
of 
F. 2 Plant.* 
sm. y. 
sm. g. 
wr. y. 
wr. y. 
159.1.1 
sm. y. 
13 
3 
AaB 
. 2 
—- 
4 
— 
? 
.3 
99 
9 
— 
8 
— 
AaB 
.4 
99 
10 
4 
3 
[ - 
AaBb 
.5 
sm. g. 
j — 
9 
— 
[ 
AB 
.6 
>> 
— 
3 
— 
? 
.7 
wr. y. 
— 
9 
3 
aBb 
.8 
99 
;— 
11 
7 
aBb 
.9 
— 
— 
20 
— 
aB 
.10 
99 
— 
— 
13 
8 
aBb 
202.1.1 
sm. y. 
15 
—: ■ • 
-— 
| 
! AB 
. 2 
9 9 
9 
1 
1 
— 
AaBb 
• 3 
sm. g. 
— 
22 
— 
7 
A ab 
209.1.1 
sm. y. 
2 
— 
3 
— 
? 
.2 
7 
— 
1 
— 
? 
.3 ! 
99 I 
3 
— 
1 
— 
? 
.4 
» 
3 
2 
3 
“ 
AaBb 
* A == Smooth (Dominant), a = wrinkled (Recessive). 
B — Yellow (Dominant), b = green (Recessive). 
