POTATO BREEDING AND SELECTION. 13 
Table I.— Record of potato crosses made at Burlington, Vl., in 1909 — Continued. 
Parentage of cross. 
Num- 
ber of 
flowers 
crossed . 
Num- 
ber of 
seed 
balls de- 
veloped. 
Percent- 
age of 
success. 
Number 
of tuber- 
bearing 
seedlings. 
10 



5 



11 



16 



5 



8 



4 



7 



8 



7 



9 



79 
11 
13.9 
457 
3 



12 
2 
16.7 
50 
21 



17 
7 
41.2 
89 
14 
3 
21.4 
75 
13 
11 
84.6 
537 
58 
9 
15.5 
388 
85 
46 
54.1 
1,562 
17 



114 
55 
48.2 
1,873 
9 



10 



9 
1 
11.1 
4 
4 



20 
4 
20 
102 
15 
3 
20 
90. 
11 
7 
63.6 
373 
34 
5 
14.7 
221 
8 



2 



16 



16 
3 
18.8 
102 
3 
3 
100 
146 
10 
6 
60 
127 
8 
3 
37.5 
561 
10 
3 
30 
268 
14 
9 
64.3 
778 
15 
3 
20 

7 
2 
28.6 
30 
5 
2 
40 
13 
21 
9 
42.9 
340 
6 



13 
7 
53.8 
121 
14 
9 
64.3 
227 
9 
1 
11.1 
10 
9 



51 
12 
23.5 
480 
34 
2 
5.9 
60 
6 
1 
16.7 
39 
62 
26 
41.9 
990 
12 
2 
16.7 
49 
15 



14 
4 
28.6 
154 
6 



12 

41.7 
122 
4 
3 
75 
66 
44 



13 



9 



4 



11 
5 
45.5 
242 
3 



14 
6 
42.9 
133 
19 
10 
52.6 
237 
27 



4 

. 

5 



6 



9 
6 
66.7 
144 
9 



9 
1 
11.1 
38 
16 



9 
2 
22.2 
57 
12 



37 
22 
59.5 
553 
12 
8 
66.7 
457 
3 



9 
4 
44.4 
76 
Average 
number 
of seed- 
lings per 
seed ball. 
Factor X Keeper 
Factor X Gastold 
Factor X Apollo 
Factor X Keeper 
Factor X Norcross 
Factor X Alexander's No. 1 Red 
Factor X Solatium efubcrosum Lind 
Factor X Round Pinkeye 
Factor X Solarium maglia 
British Queen X Star of the East 
Up-to-Date X Fuerst Bismarck 
Up-to-Date X Keeper 
Up-to-Date X Norcross 
Up-to-Date X Early Silverskin 
Up-to-Date X Empire State 
Up-to-Date X Irish Seedling 
Up-to-Date X Round Pinkeye 
Delaware X Keeper 
Delaware X Round Pinkeye 
G em of Aroostook X Keeper 
Gem of Aroostook X Rand's Peachblow. 
Gem of Aroostook X Round Pinkeye 
Blight Proof X Fuerst Bismarck 
Blight Proof X Apollo 
Blight Proof X Early Silverskin 
Blight Proof X Garnet Chili 
Green Mountain X Apollo 
Green Mountain X Keeper 
Green Mountain X Early Silverskin 
Green Mountain X Round Pinkeye 
Green Mountain X Alexander's No. 1 Red 
Green Mountain X Apollo 
Harris Snowball X . Fuerst Bismarck 
Harris Snowball X Apollo 
Harris Snowball X Early Silverskin 
Harris Snowball X Round Pinkeye 
Holborn Abundance X Apollo 
Holborn Abundance X Early Silverskin 
Holborn Abundance X Irish Seedling 
Keeper X Fuerst Bismarck 
Keeper X Keeper 
Keeper X Norcross 
Keeper X Early Silverskin 
Keeper X Empire State 
Keeper X Irish Seedling 
Keeper X Round Pinkeye 
Keeper X Venezuela 
Norcross X Apollo 
Norcross X Keeper 
Norcross X Round Pinkeye 
Rural New Yorker No. 2 X Early Silverskin 
Star of the East X Round Pinkeye 
Alexander's No. 1 Red X Irene 
Alexander's No. 1 Red X Apollo 
Alexander's No. 1 Red X Keeper 
Alexander's No. 1 Red X Factor 
Professor Maerker 652 X Apollo 
Professor Maerker 652 X Keeper 
Professor Maerker 652 X Solanum (tuberosum Lind 
Professor Maerker 652 X Solanum maglia 
Professor Maerker 652 X Alexander's No. 1 Red 
Rural Blush X Star of the East 
Manly X Irene 
Manly X Alexander's No. 1 Red 
Early Excelsior X Apollo 
Early Excelsior X Keeper 
Early Excelsior X Solanum (tuberosum Lind 
Early Excelsior X Keeper 
Early Excelsior X Solanum ctubcrosum Lind 
Empire State X Fuerst Bismarck 
Empire State X Keeper 
Empire State X Solanum maglia 
Garnet Chili X Keeper 
Garnet Chili X Fuerst Bismarck 
Garnet Chili X Early Silverskin 
Garnet Chili X Rand's Peachblow 
Round Pinkeye X Keeper 
Venezuela X Keeper 
Venezuela X Solanum maglia 
Whiton's White Mammoth X Keeper 











415 

25 

12.7 
25 
48.8 
43.1 
34 

31 


4 

25.5 
30 
53.3 
44.2 



34 
48.7 
21.2 
18.7 
89.3 
86.4 

15 
6.5 
37.8 

17.3 
25.2 
10 

40 
30 
39 
38.1 
24.5 

38.5 

24.4 
22 




48.4 

22.2 
23.7 




24 

38 

28.5 

25.1 
57.1 

19 
