CHARACTERS IN AX UPLAXD-EGYPTIAX COTTON HYBRID. 
45 
correlation of which an axis or leaf character is the first member, 
while bract length becomes the first member in correlations with 
other bract characters and with the flower, boll, and seed characters. 
Table 12. — Coefficients of correlation in the second generation of the Eoldon-Pima 
hybrid uhich are regarded as significant, having amounted to three and one-half or 
more times the probable error of the coefficient. 
[The signs given in the column headed " Expected sign " show whether a positive or negative correlation 
was to be expected if coherence occurred. For pedicel length and bract number of teeth the "'ex- 
pected " signs indicate the relations of the means of the Holdon and Pima populations grown in 1917 
and 1918. For all other characters the relations of the parental means of 1919 are indicated.] 
Correlation. 
Character pair. 
Expected 
sign. 
Axis length and— 
Internode length 
Internode number 
Fruiting branch: 
Length 
Internode 
Leaf extension 
Pedicel length 
Bract: 
Number of teeth ... 
Dentation 
Fiber color 
Internode length and— 
Internode number 
Fruiting branch: 
Length 
Internode 
Leaf length 
Pedicel length 
Bract dentation 
Internode number and — 
Fruiting branch length. 
Callus color 
Bract: 
Number of teeth 
Dentation ! 
Boll apex 
Fruiting branch length and— 
Fruiting branch internode. 
Leaf length 
Pedicel length 
Bract: 
Length 
Number of teeth ; 
Dentation 
Calvx dentation 
Boll diameter 
Fruiting branch internode 
and— 
Bract number of teeth 
Boll length 
Midlock furrow 
Leaf length and— 
Lobe index 
Leaf extension 
Bract length 
Boll diameter 
Leaf index and— 
Lobe index 
Vein angle 
Leaf extension 
Lobe index and vein angle 
Vein angle and— 
Leaf ext ension 
Petal color 
Leaf extension and— 
Bract length 
Fiber color 
Callus color and — 
Petiole hairiness 
Calyx glands 
Corolla index 
Boll: 
Diameter 
Index 
Coeffi- 
cient. 
Character pair. 
+0.831 
+ .715 
-i- .620 ! 
+ .226 
+ .172 ! 
+ .218 
+ .198 ! 
+ .257 ( 
+ . 178 
+ .300 
+ 
.596 
+ 
.307 
+ 
.199 
+ 
.259 
+ 
.181 
+ 
.388 
+ 
.182 
i + .201 
| + .250 
+ .213 
+ .362 
+ .214 
+ .183 
+ .178 
+ -184 II 
+ .201 
- .201 
+ .182 
+ .210 
+ .179 
- .195 
- .264 
- .282 
+ .301 
+ .205 
- .183 
+ .750 
+ .502 
- .422 
+ .566 
+ .197 
- .200 
- .297 
+ .186 j 1 
- .218 ! 
+ .20s 
+ .187 ! ; 
Petiole hairiness and — 
Bract: 
ConnatioD 
Tooth spread 
Pedicel length and— 
Bract: 
Length 
Number of teeth 
Bract length and— 
Bract number of teeth 
Calvx dentation 
Boll: 
Length 
Diameter 
Bract connation and— 
Calyx glands 
Lint index 
Calvx dentation and— 
"Petal spot 
Boll length 
Midlock furrow 
Calyx glands and— 
Petal color 
Stigma index 
Boll index 
Corolla length and— 
Corolla index 
Petal: 
Color 
Spot 
Stamen length 
Pistil length 
Boll apex 
Corolla index and pistil length. 
Petal color and— 
Pistil length 
Fiber length 
Stamen length and— 
Anther color 
Pistil length 
Stigma index 
Boll diameter 
Anther color and stigma index. 
Pistil length and— 
Stigma index 
Lock number t 
Boll apex 
Stigma index and lock number. 
Lock number and— 
Boll diameter 
Midlock furrow 
Boll length and— 
Boll: 
Diameter 
Index 
Apex 
Fiber length 
Boll diameter and— 
Boll index 
Lint index 
Boll index and boll apex 
Boil apex and fiber length 
Fil er length and liber color — 
Correlation. 
Expected Coeffi- 
sign. cient. 
■0.247 
- .187 
+ .208 
4- .312 
+ .187 
+ .195 
+ .186 
+ .187 
- .253 
+ -178 
- .220 
+ .174 
+ .230 
- .200 
+ .242 
+ .187 
- .485 
4- .214 
+ .244 
+ .242 
+ .470 
- .185 
- .243 
I 
.197 
.277 
.254 
.197 
.246 
.180 
.222 
.466 
.182 
.212 
.216 
.202 
.193 
- .703 
- .504 
+ .175 
+ .376 
+ .214 
+ .448 
- .172 
