H 54 
Journal of Agricultural Research 
Vol. V, No. as 
Tabi*3 II .—Deviation in litter size of the offspring from the parental generation in 
swine —Continued 
BOAR 12 
Size of litter of 
parents. 
Num¬ 
ber of 
mat¬ 
ings. 
Fi generation. 
Fa generation. 
Boar. 
Sow. 
Mean. 
Standard devia¬ 
tion. 
Mean. 
Standard devia¬ 
tion. 
12 
2 
1 
9 
O 
7 
O 
12 
4 
2 
9. 5 ± 0. 238 
. 5 ±0.118 
8. $ ± 0. 238 
. 5 dbo. 118 
12 
5 
2 
4 ± • 956 
2 ± .6745 
7 
0 
12 
6 
I 
8 
0 
10 
0 
12 
7 
5 
7 - 6 ± • 5 54 
1. 85 ± .3001 
9.2 ± .399 
1. 32 ib . 282 
12 
8 
6 
8. 82 ± .384 
1. 39 ± .27 
8. 5 ± • 671 
2.4 ± .473 
12 
9 
6 
6. S ± . 591 
2. I4± . 414 
7 - 83± -387 
1. 4 ± . 272 
12 
10 
1 
II 
0 
IO 
0 
12 
11 
2 
II 
0 
8. 5 ± .717 
i- 5 ± • S °5 
12 
12 
1 
IO 
0 
12 
0 
12 
13 
2 
7 
0 
9-5 ± -m 
I- 5 ± • 5°5 
BOAR 13 
13 
6 
3 
8. 66 ± 
o *493 
I- 25 ±°- 345 
»• 33 ± 
0.185 
0. 47±0.129 
13 
8 
2 
9*5 ± 
.717 
i- 5 ± • 5°5 
. 7 
± 
.956 
2 
± -6745 
13 
9 
2 
11. 5 ± 
.717 
*■ 5 ± • 5°5 
9 
± 
•956 
2 
± -6745 
13 
11 
1 
IO 
0 
6 
0 
13 
12 
2 
. 7*5 ± 
. 168 
• 5 ± • 245 
10 
dt 
•479 
1 
± -337 
13 
13 
5 
9. 6 ± 
. 526 
i- 74 ± - 37 i 
10 
± 
• 956 
2 
± - 6 745 
BOAR 14 
14 
8 
2 
9 
0 
10. 5 ± 0. 239 
0. 25 ±0. 1686 
14 
9 
1 
9 
0 
11 
0 
14 
12 
1 
7 
0 
3 
0 
BOAR IS 
*5 
8 
1 
12 
0 
8 
0 
INDIVIDUAL EVIDENCES OF SEGREGATION 
Table II is produced by treating the litter size as a detailed character 
and comparing the parental generation with offspring. The average of 
the Fi deviations is 1.87 ±0.0549, while the F 3 mean deviation is 1.92 ± 
0.0582. The probable errors make these two constants overlap, so that 
the individual treatment when lumped seems no more significant than 
when the deviations per generation are considered. Yet many individual 
evidences of segregation exist, and many times the F 2 generation from a 
particular cross is so small in numbers that only a fragmentary view of 
the segregable possibilities is obtained. 
