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Plant Gene and Trait, 2013, Vol.4, No.3, 9
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14
Table 5 Direct (diagonal) and indirect effects of component characters on grain yield in veryhigh plant density (D
1
: 30 cm× 20 cm)
Characters
PH
DFF
LAF
LI
DI
FWI
NR
LR
NSB
TCC
PC
r
g
with
grain yield
PH
-0.822
0.552 -0.283
0.021
0.253
0.031 -0.006
0.120
0.004
0.095 -0.127
0.181
DFF
0.245
-1.851
0.303 -0.043 -0.139 -0.027
0.012
0.353
0.166
0.302
0.191
-0.281
LAF
0.226
-0.545
1.031
0.499 -0.101
0.021 -0.199 -0.073 -0.054 -0.387 -0.223
0.332
LI
-0.110
0.512
0.323
1.158
0.167
0.098 -0.254
0.103 -0.290 -0.228 -0.542
0.694*
DI
-0.703
0.867 -0.352
0.089
0.297
0.063 -0.005
0.002 -0.163
0.145 -0.244
0.346
FWI
-0.271
0.549
0.238
0.164
0.199
1.298 -0.218
0.048 -0.277 -0.140 -0.547
0.817*
NR
-0.016
0.068
0.620
0.121
0.005
0.061 -0.331
0.154 -0.123 -0.330 -0.471
0.466
LR
0.134
0.888
0.103 -0.022
0.000 -0.006
0.069 -0.735 -0.134 -0.110 -0.007
0.085
NSB
0.011
0.861
0.157
0.128
0.135
0.073
-0.114 -0.276
1.357
0.152 -0.372
0.515
TCC
0.079
0.586
0.417
0.037 -0.045
0.013 -0.014 -0.085
0.056
0.956 -0.246
0.347
PC
0.056
0.598
0.389
0.144
0.122
0.087 -0.204 -0.009 -0.224 -0.397
0.592
-0.064
Note: *Significance at 5 per cent level; **Significance at 1 per cent level; Residual effect = 0.332; r
g
= Genotypic correlation; PH: Plant
height; DFF: Days to 50 per cent flowering; LAF: Leaf area at 50 per cent flowering; LI: Length of the primary inflorescence; DI: Diameter
of the inflorescence; FWI: Fresh weight of the inflorescence; NR: Number of rachis per inflorescence; LR: Length of the rachis per
inflorescence; NSB: Number of secondary branches per inflorescence; TCC: Total carbohydrates content; PC: Protein content
Table 6 Direct (diagonal) and indirect effects of component characters on grain yield in high plant density (D
2
: 30 cm × 30 cm)
Characters
PH
DFF
LAF
LI
DI
FWI
NR
LR
NSB
TCC
PC
r
g
with
grain yield
PH
0.453
-0.001
0.194 -0.405 -0.361 -0.177
0.056 -0.260
0.580 -0.003 -0.041
0.499
DFF
0.000
-0.641
0.143
0.112
0.259
0.063
0.007 -0.250 -0.564
0.006
0.049
-0.583
LAF
0.152
-0.159
0.576 -0.164
0.144 -0.067 -0.150 -0.148 -0.211 -0.007 -0.015
0.177
LI
0.300
0.117
0.154
1.611
-0.398 -0.220 -0.075 -0.013
0.955 -0.003 -0.051
0.375
DI
0.297
0.302 -0.151 -0.442 -0.550 -0.129
0.160
0.052
0.753
0.001 -0.034
0.364
FWI
0.383
0.194
0.187 -0.644 -0.341
2.209 -0.029 -0.069
0.888 -0.003 -0.552
0.624
NR
-0.105
0.018
0.358 -0.190
0.363 -0.025 -0.242
0.148
0.100 -0.005 -0.023
0.301
LR
-0.262
0.358 -0.090
0.018 -0.064
0.332 -0.080
0.449
0.362
0.001 -0.002
0.235
NSB
0.209
0.287 -0.097 -0.464 -0.329 -0.147 -0.019
0.129
1.258
0.003 -0.636
0.415
TCC
0.087
0.251
0.262 -0.145
0.059 -0.051 -0.089 -0.048 -0.237 -0.006 -0.300
0.311
PC
0.241
0.411
0.114
-0.403
0.248
0.049 -0.072
0.128
0.600 -0.015 -0.077
0.131
Note: *Significance at 5 per cent level; **Significance at 1 per cent level; Residual effect = 0.266; r
g
= Genotypic correlation; PH: Plant
height; DFF: Days to 50 per cent flowering; LAF: Leaf area at 50 per cent flowering; LI: Length of the primary inflorescence; DI: Diameter
of the inflorescence; FWI: Fresh weight of the inflorescence; NR: Number of rachis per inflorescence; LR: Length of the rachis per
inflorescence; NSB: Number of secondary branches per inflorescence; TCC: Total carbohydrates content; PC: Protein content
negligible negative direct effects on grain yield in
normal, high and low plant density levels respectively.
Protein content showed high negative direct effects in
normal density, whereas in high plant density this trait
recorded negligible negative direct effects grain yield.
The estimate of residual effect reflects the adequacy and
appropriateness of the characters chosen for the path
analysis. In the present study, the residual effect was
low in all the four plant density levels indicating the
adequacy of characters chosen for the study to reflect
the grain yield.
4 Conclusion
Considering both correlation and path analysis together,
it could be concluded that fresh weight of the inflores-
cence, length of the primary inflorescence, number of