Cotton Genomics and Genetics 2015, Vol.6, No.1, 1-6
3
The results of phenotypic and genotypic correlation
showed that nodes to 1
st
fruiting branch and
monopodia per plant has no significant positive
association with any trait at both genotypic and
phenotypic levels, sympodia per plant showed positive
significant correlation with boll per plant, boll weight
and yield at both genotypic and phenotypic levels,
Plant height showed no positive significant
association with any of the traits. Boll weight showed
strong association with the yield at both levels.
CLCuD showed negative association with yield at
both levels (Table 2; Table 3).
Table 2 Genotypic correlation coefficients of various traits of 18 genotypes/strains of cotton
VARIABLES
NFFB
MPP
SPP
BPP
PLH(cm)
BW (g)
CLCuD (%)
Yield (kg/ha)
NFFB
1
MPP
-
0.2204
1
SPP
-
0.001
-
0.0926
1
BPP
0.2629
-
0.0731
.9172 **
1
PLH (cm)
-
0.2409
-
0.1935
0.1275
0.0995
1
BW (g)
0.1181
-
0.2992
.818 **
.8027 **
-
0.1026
1
CLCuD (%)
-
0.1351
-
0.1608
0.175
0.2306
0.2685
-
0.0622
1
Yield (kg/ha)
0.3425
-
0.0909
.8718 **
.8501 **
0.2302
.7228 **
-
0.02
1
Table 3 Phenotypic correlation coefficients of various traits of 18 genotypes/strains of cotton
VARIABLES
NFFB
MPP
SPP
BPP
PLH(cm)
BW (g)
CLCuD (%)
Yield (kg/ha)
NFFB
1
MPP
-
0.2019
1
SPP
0.0013
-
0.1024
1
BPP
0.2459
-
0.0542
.8559 **
1
PLH (cm)
-
0.2308
-
0.183
0.1253
0.0875
1
BW (g)
0.1185
-
0.1684
.6792 **
.6895 **
-
0.0998
1
CLCuV (%)
-
0.1296
-
0.151
0.1496
0.2109
0.262
-
0.0587
1
Yield (kg/ha)
0.3162
-
0.1015
.769 **
.7381 **
0.2264
.5765 *
-
0.0322
1
Path coefficient analysis revealed that all traits
influenced directly and positively on yield except for
bolls per plant (Table 4). Nodes to first fruiting
branch showed positive indirect response to on yield
while all other traits indirectly showed negative
response to yield. Sympodia per plant positively and
indirectly influenced the yield through, plant height,
boll weight and CLCuD while all other traits showed
negative indirect effect on yield. Bolls per plant
showed negative direct effect on yield while it
showed positive indirect effect on yield via Nodes to
first fruiting bud per plant, Plant height, Boll weight
and CLCuV but for monopodia per plant it showed
negative indirect effect. For plant height the
characters like sympodia per plant and CLCuV
positive indirect effect on yield while all other
characters showed negative indirect response to yield.
For Boll weight the characters like Nodes to first
fruiting, sympodia per plant, Plant height, Boll
weight and CLCuV showed positive indirect effect
on yield while all other characters responded
negatively and indirectly. CLCuV showed negative
indirect response to yield via all characters except
sympodia per plant and plant height (Table 4).
Table 4 Direct (diagonal) and indirect (off
-
diagonal) effects of various plant traits in cotton
VARIABLES
NFFB
MPP
SPP
BPP
PLH(cm)
BW (g)
CLCuD (%) Yield (kg/ha)
NFFB
0.8265
-
0.0916
-
0.0016
-
0.3312
-
0.1142
0.0666
-
0.012
0.3425
MPP
-
0.1821
0.4157
-
0.1416
0.092
-
0.0918
-
0.1688
-
0.0143
-
0.0909
SPP
-
0.0009
-
0.0385
1.529
-
1.1553
0.0604
0.4615 0.0156
0.8718
BPP
0.2173
-
0.0304
1.4023
-
1.2597
0.0472
0.4529 0.0205
0.8501
PLH (cm)
-
0.1991
-
0.0804
0.1949
-
0.1253
0.4741
-
0.0579 0.0239
0.2302
BW (g)
0.0976
-
0.1244
1.2507
-
1.0111
-
0.0486
0.5642
-
0.0055
0.7228
CLCuV (%)
-
0.1116
-
0.0668
0.2676
-
0.2905
0.1273
-
0.0351 0.0891
-
0.02
