Yield Stability of Very Early Rice Genotypes Under
Rainfed Upland Ecosystem
Volume 3- Issue 5
Ashok Mishra1*, Meera Kar2 and Padmini Swain2
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- 1AICRP for Dryland Agriculture, OUAT, India
- 2ICAR-National Rice Research Institute, Cuttack, Odisha
*Corresponding author:
Ashok Mishra, Breeder and Officer-in-charge, AICRP on Potato, Directorate of Research, AICRP for Dryland
Agriculture, OUAT, Bhubaneswar-751003, Odisha, India
Received: July 01, 2018; Published: July 18, 2018
DOI: 10.32474/CIACR.2018.03.000171
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Abstract
A field experiment was carried out at All India Coordinated Research Project for Dryland Agriculture, Orissa University of
Agriculture and Technology, Phulbani to evaluate the newly developed early maturing rice genotypes and estimate their yield
stability. The trial was laid out in randomized block design with three replications for 5 years from 2012 to 2016 involving 26 rice
genotypes including-(a) 22 improved lines from AICRP for Dryland Agriculture, OUAT, Phulbani (ODR lines; ODR denotes ‘Odisha
dryland rice’), (b) one line from NRRI sub-centre, Hazaribag, DDR-121, (c) one exotic variety, ZHU 11-26 and (iv) two varieties from
NRRI, Cuttack, Vandana and N-22. Another set of experiment was carried out at ICAR-National Rice Research Institute, Cuttack to
evaluate the response of the genotypes towards drought stress. Highest mean grain yield was recorded in ODR 12-3 (30.43 q/ha)
followed by ODR 12C (27.42 q/ha) and ODR 41 (27.22 q/ha). ODR 12C exhibiting high mean yield along with highest slope can be
considered most adaptable. Long slender aromatic genotypes such as ODR 1, ODR 1-1, ODR 1-2 and ODR 1-3 had also high yield
coupled with slope >1.0, thus exhibited high stability. Drought score (DS), performed on the basis of Standard Evaluation System
(SES) scale, showed that ODR-55(1) is highly drought tolerant on the basis of leaf rolling and drying character (SES=0).
Keywords: Rice; Rainfed; Drought score; Yield stability
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