Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
environmental and agronomic conditions. Genotypic correlations among the yield and the
biometrical traits were studied.
Trait
s
EH
DAT
DAS
ASI
CL
NRC
HSW
SP
GY
Correlation of yield and the associated traits under rainfed conditions
PH EH DAT DAS ASI CL NRC HSW SP
0.7952
**
-
0.8227
**
-
0.9291
**
-
0.7016
**
0.8998
**
0.8576
**
0.8009
**
0.8244
**
0.8415
**
-
0.8159
**
-
0.9511
**
-
0.7507
**
0.7585
**
0.6496
**
0.7697
**
0.4365
*
0.5137
**
1
0.862*
*
0.3603
*
-
0.7914
**
1
-0.3256
0.7834
**
-
0.783*
*
-
0.4877
*
1
0.2077 -0.1836
-0.3278
-
0.497*
*
-
0.508*
*
-
0.804*
*
-
0.4719
*
-
0.4984
**
-
0.592*
*
-
0.5362
**
417 | Page Managing genetic resources for enhanced stress tolerance
1
-0.87**
0.9999
**
0.9248
**
0.8655
**
0.7958
**
1
0.5051
**
0.8108
**
0.9889
**
1
0.9999
**
0.8762
**
1
0.9999
**
* Significance at 1 % level; ** Significance at 1 % level; Plant Height (PH); Ear height (EH); Days to 50%
tasselling (DAT); Days to 50% silking (DAS); Anthesis Silking Interval (ASI); Cob length (CL); No of rows per
cob (NRC); Hundred seed weight (HSW); Shelling % (SP); Grain Yield (GY).
The range of the grain yield varied from 5167 kg/ha to 7450 kg/ha. The hybrid VAH 21007
recorded highest yield of 7450 kg/ha under rainfed conditions. Plant height, ear height, cob
length, number of rows per cob, hundred seed weight and shelling percentage exhibited positive
association with yield at 1% significance level. Days to 50% tasselling and days to 50% silking
showed negative association with yield at 1% significance level. Cob length had positive
association with number of rows per cob, hundred seed weight and shelling percentage. Maize
is a cross pollinated crop and the prolonging of Anthesis to silking interval will lead to poor
seed set and it is proved by the negative association of ASI with yield. Water stress during
1