CHARACTERS IN AX UPLAND-EGYPTIAN COTTON HYBRID. 37 
mozygosity and hence an appreciably smaller variability in the 
progeny than in the progeny of an intermediate F 2 individual tor 
this Treason in cases where the extremeness of the highest or lowest 
parent individual was less than 80 no data on the variability ot the 
F progenies are given in the table. This leaves 8 characters m re- 
spect to which the F, parent individual giving the highest value had 
an extremeness of 80 per cent or greater and 15 characters in respect 
to which the F, parent individual giving the lowest value had an 
extremeness of 80 per cent or greater. 
Table 11 —Holdon-Pima cotton hybrids: Relation between the percentage eztrem, 
of the F 2 parent individuals which gave the highest and the lowest values for the severat 
characters and the variability of their F z progenies. 
rrhP a -Prqgp« of the coefficients of variation or standard deviations of the T>, progenies of thi 
F^ndhddSs^Wch Rvalues nearest the mean of the whole F ? population arc stated for com,,: n 
For the three graded characters-leaf callus color, petiole hairiness, and petal .^-Hgeg" 
deviations are Spared . For all other characters the comparison is of coefficients of a anation .] 
Character. 
Axis: 
Length 
lnternode number. 
Internode length.. 
Fruting branch: 
Length 
First internode 
Leaf: 
Length 
Width 
Index 
Lobe index 
Vein angle 
Callus color 
Petiole hairiness 
Petal color 
Boll: 
Lock number 
Length 
Diameter 
Index 
Relative extreme- 
ness of F j 
parents which 
gave the — 
Highest 
value. 
86.0 
100.0 
88.5 
88.0 
(-80.0) 
(-80.0) 
(-80.0) 
81.0 
85.5 
85.0 
87.5 
(-80.0) 
(-*0.0) 
(-80.0) 
(-S0.0) 
(-80.0) 
(-80.0) 
Lowest 
value. 
Coefficients of variation or standard deviations 
of F 3 progenies of Fj individuals which 
the— 
Highest 
value. 
Lowest 
value. 
95. 5 
-80.0) 
92.3 
81.5 
81.0 
91.5 
83.5 
88.0 
87.5 
100.0 
100.0 
81.0 
-80.0) 
93. 5 
88.0 
14.60 31.70 
4.60 17.70 
14.40 ' 12.10.20.10 
Value nearest the 
mean of the Fj 
population. 
Number 
Average of i 
C or a. mediate 
progenies. 
"0,34.70 
G.40 
6. 80 
7.80 
.89 
'33.00,55.50 
13.30 
19.50.17.30 
10.60 
14.60 
16.70 
: .45.1.43 
2.12 to 1.10 
.68 
12.30,5.40 
18.10 
10.00 
13.30 
23.30 
19.20 
14.30 
15.40 
11.60 
16.60 
11.70 
1.48 
1.32 
. 53 
7.60 
6.70 
9.00 
8.60 
11.40 
i Two progenies the F 2 parents of which gave the same value. 
2 Ei.^ht progenies the F 2 parents of which gave the same value. 
As compared with the average for the intermediates, the F 3 progeny 
of the highest V, parent gavealower coefficient oi variation or stand- 
ard deviation for six of the eight characters winch met the conditions 
stated in the proceeding paragraph, and the F, progeny of the Lowest 
F 2 parent gave a lower coefficient of variation or standard deviation 
for 8* of the 15 characters which met the conditions. 
Of the sever characters in respect to which the extremeness oJ both 
the highest and the lowest F, parent was 80 per cent or greater, onl} 
-omitting two cases In which there were two F, parent individuals which j 
progeny of one but not of the other having been less van ible than the progenies of tin mtermea] 
individuals. 
