Directorate of Rice Research (DRR), through All India Coordinated ...

DRR Annual Progress Report 2010, Vol.1 – Varietal Improvement
Evaluation of entries in IVT-VE-DS for drought tolerance under rainout shelter at
Hazaribagh during Kharif 2010
IET No. Days to
50%
flowering
Plant
Ht.
(cm)
Grains/
Panicle
(No.)
Chaffs/
Panicle
(No.)
1.7
Sterility
(%)
Grain
Yield
(G/plot)
Grain
Yield
(kg/ha)
RWC
(%)
22020 74 75.9 24 54 69.2 9.5 119 89.73 3
22021 76 58.0 9 40 81.6 2.1 26 89.27 5
22022 75 73.9 10 58 85.3 4.3 53 87.82 5
22024 NF 63.6 0.0 0 82.29 9
22025 92 73.6 25 30 54.8 5.5 68 89.54 5
22026 72 79.7 22 49 68.8 8.6 108 89.02 3
(RC) 71 81.2 38 38 49.7 27.2 340 90.01 3
22027 NF 54.9 0.0 0 85.58 9
(LC) 65 57.5 13 60 81.9 4.6 58 88.31 5
22028 86 71 9 58 86.0 3.2 39 89.60 5
22029 71 71.6 18 45 71.1 6.6 83 89.59 5
22030 NF 72.9 0.0 0 85.49 7
(NC) 74 65.0 20 71 78.2 2.9 36 91.96 7
22031 66 66.1 8 63 88.7 1.7 21 85.58 7
22032 75 69 23 39 62.7 8.9 111 86.53 3
22033 72 64.8 18 34 64.8 8 100 89.56 5
22034 76 64.9 28 34 54.8 21.6 270 86.90 3
22035 NF 63 0.0 0 72.44 9
22036 71 71.3 20 62 75.8 4.5 56 87.14 5
22037 76 70.8 22 37 62.8 8.6 108 92.41 3
22038 70 78.4 22 49 69.3 8.7 109 86.44 5
22039 NF 49.7 0.0 0 88.75 7
LC Brown
Gora
Gross Plot Size 0.8 m 2
Net Plot Size 0.8 m 2
Date of
Sowing
21.7.10
Drought
Score
(SES)
Drought at one or other crop growth stage during Kharif 2010 was reported at Hazaribagh,
Paramkudi and Bhubaneswar. Whereas, well distributed normal rainfall was received at other
locations ensuring good crop stand. At all the locations no major disease and insect pest damage
was reported. At Ranchi the yield of the entries was very poor, but no explanation provided, hence
not considered for analysis of mean of the entries. All the entries were also evaluated for drought
tolerance under rainout shelter at Hazaribagh. The drought stress was imposed at 2 stages one at
vegetative and another at reproductive stage. Under rain out shelter screening the checks Vandana
(regional) and Brown gora (local check) had drought tolerance scores of 3 and 5, respectively in 0-9
scale, while the national check Anjali had 7 score. Among the test entries IET Nos.22020, 22026,
22032, 22034 and IET 22037 had 3 score indicating that these entries had tolerance to drought. The
other 9 entries showed moderate tolerance to drought with a score of 5 in 0-9 scale. The data is
provided below.
The performance of the entries under drought stress and normal rainfall conditions are
discussed separately.