1042 
Vol. XXVIII, No. 10 
Journal of Agricultural Research 
Table I gives for each progeny the total number of plants before thinning, and 
the number and percentage of individuals of which the terminal bud was aborted 
at some stage of development. The data also are combined for all progenies of 
aborted individuals and all progenies of normal individuals, taken as one array 
in each case. 
Table I.— Numbers and percentages of aborted plants in progenies of aborted and 
normal individuals of Pima cotton 
Progeny of plant 
No. 
Progenies of aborted plants 
Progenv of plant 
No. 
Progenies of normal plants 
Total in¬ 
dividuals 
Number 
aborted 
Percentage 
aborted 
Total in¬ 
dividuals 
; 
Number 
aborted 
Percentage 
aborted 
1. 
i 
43 
2 
I 4.6 
1_ 
37 
6 
16.2 
2_ 
34 
1 
! 2.9 
2_ 
43 
5 : 
11.6 
3.. 
44 
2 
4.5 
3_ 
48 
2 : 
4.2 
4_ _ J 
38 
2 
| 5.3 
4_ 
43 
1 ! 
2.3 
5_ 
47 
i 2-1 
5. . .. . 
53 
1 1 
1.9 
6. 
49 
3 
6. 1 
6. , _ 
45 
1 ! 
2.2 
7_ 
55 
0 
1 0 
7_ 
65 
4 ! 
6.2 
8.. 
49 
1 
2.0 
8_ 
41 
3 i 
7.3 
9_ 
39 
1 
2.6 
9_ 
50 
o ; 
0 
10 . 
35 
2 
5. 7 
10 . . , _ 
51 
l ! 
2.0 
11__ 
61 
0 
0 
11_ 
45 
0 ! 
0 
12 _ . 
46 
3 
6. 5 
12_ 
48 
2 i 
4.2 
Total, _ 
540 
18 
3. 33 ±0.52 
Total_ 
569 
26 j 
4. 56±. 059 
When all progenies of aborted and of normal plants, respectively, are con¬ 
sidered as one array, the latter give a slightly higher percentage of aborted indi¬ 
viduals, but the difference is not significant, being only 1.6 times its probable 
error. It is concluded that abortion of the terminal bud in this material is 
not an inherited character. 
