Screening Rice (O. Sativa L.) in Salinity Gradient to Identify Performance During Vegetative Stage for Salinity Stressed Environments
Journal of Plant Sciences
Volume 7, Issue 6, December 2019, Pages: 144-150
Received: Oct. 6, 2019;
Accepted: Oct. 28, 2019;
Published: Nov. 5, 2019
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Andrew Abiodun Efisue, Department of Crop & Soil Science, University of Port Harcourt, Port Harcourt, Nigeria
Ella Elizabeth Igoma, Department of Crop & Soil Science, University of Port Harcourt, Port Harcourt, Nigeria
Salinity is one of the leading abiotic factors constraint rice production and efforts are being made by scientists to mitigate their effects on rice productivity. The objectives of this study are to identify salinity tolerant rice that is eco-salinity specific to ameliorate the salinity stress. The study comprises 16 advanced breeding lines and Pokkali a universal check was used in potted experiments. Four experiments were established concurrently in two replications in a randomized complete block design. The first experiment is none stressed ECO, the second (EC2) at 2.0 dSm-1, three (EC3) and four (EC4) at 3.0 dSm-1 and at 6.0 dSm-1, respectively. The genetic materials used in this study were replicated in all the experiments. Significant variations were observed among the genotypes based on their reaction to salinity stress at different salinity gradients. Genotype like IR84105-5-B-1-B-1 is constantly showing high tillering ability across salinity concentration gradients. The most stable genotypes were IR84931-9-B-2-B-3, and IR84931-9-B-1-B-3. The biplot indicates the possibility of two mega environments, which are (EC0 and EC3) and (EC2 and EC6), respectively for salinity stress. The results from this study has identified promising genotypes IR84105-5-B-1-B-1, and IR84105-5-B-1-B-5 for high tillering ability across the gradients, which is one of the major grain yield components and the most stable genotypes were IR84931-9-B-2-B-3 and IR84931-9-B-1-B-3 across the salinity gradients, which could be deployed to these regions.
Andrew Abiodun Efisue,
Ella Elizabeth Igoma,
Screening Rice (O. Sativa L.) in Salinity Gradient to Identify Performance During Vegetative Stage for Salinity Stressed Environments, Journal of Plant Sciences.
Vol. 7, No. 6,
2019, pp. 144-150.
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