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18. Morphogenetic Response of Assorted Rice Genotypes to Salinity in Tanzania

Author

Barnabas Sitta, Sophia Kashenge, Sang-Bok Lee, Kang Kyung-Ho, Victoria Bulegeya, Mbaraka Batare, and Rebecca Mwakapala

Abstract

Salinity, where salts concentrate on the soil surface causing severe decline of crop yields, is a worldwide problem. In Tanzania salinity is one of the major soil degradation challenges affecting over 3.5 million hectares limiting agriculture productivity of various crops including rice. Most of the varieties grown are sensitive to salts and inadequate tolerant cultivars available in the country. A hydroponics mass screening technique using Yoshinda Solution was used to test the 102 genotypes in NaCl- saline treated and non-treated solution at Tanzania Agricultural Research Institute (TARI-Dakawa Centre). Different salt concentrations (4 dSm-1, 6 dSm-1, 8 dSm-1 and 10 dSm) were used and the experiment was done in three replications. The genotypic variability for salinity tolerance was observed as less salt injury symptoms, low Na+ accumulation and Na+/K+ ratio in plant tissues and high biomass accumulation (fresh weight and dry weight). Results revealed further those 28 genotypes (28.45%) out of 102 showed tolerance to salinity, at high salinity level of 10dSm-1. Lines namely SR35266-2-18-2-1, SR35250-1-19-1-1, SR23364-128-1762-1-HV-1-1, SR35230-1-12-1-1, SR23364-128-1986-1-HV-1-1, SR34590-HB3433-4-1-1, SR35266-2-7-1-1, PBR1000922-1 and SR34053 (#5-52)-1-4-2-10-3-3 showed high performance under high salt conditions. Others includes SR35266-3-1-5-1, SR34574-2-10-3-1-2-1, SR35278-2-10-1-1, SR35250-2-3-1-1, SR35266-3-2-3-1, SR35266-3-2-4-1, SR23364-133-184-1-HV-1-1, SR34592-HB-1-HV-1, and SR34042F3-22-1-1-5-3 indicated tolerance to salt and had high dry matter as well. All the genotypes had increased levels of Na+ and differential performance was observed in some genotypes under saline and non-saline conditions. Among these three lines namely SR35266-2-7-1-1, SR23364-128-1762-1-HV-1-1, and SR34590- HB3433-4-1-1expressed high dilution ability as the K+ and Na+ concentrations were lower compared to other genotypes. The study, therefore, suggests that the lines can be used in breeding programs to develop varieties with potential to salt tolerance and other traits.

Published
2022
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34. An Observational Study Using Ultrasound to Assess Allowable Needle Insertion Range of Acupoint CV12

Author

Chu, Hongmin, primary, Kim, Jaehyo, additional, Park, Seongjun, additional, Kim, Jaehyun, additional, Lee, Jung-Han, additional, Ha, Won-Bae, additional, Jung, Hyun-Jong, additional, Yang, Seung-bum, additional, Kim, Cheol-hyun, additional, Park, Jun Yong, additional, Kang, Kyung-ho, additional, Lee, Sangkwan, additional, and Lee, Sanghun, additional

Published
2022
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43. Correlation and Path Coefficient Analysis of Yield and Component Traits of KAFACI doubled haploid Rice (Oryza sativa L) Genotypes in Malawi

Author

Elias Jeke, Tenyson Mzengeza, Kang Kyung HO, and Cornwell Imanic

Subjects
food and beverages
Abstract

The present study exhibits a yield and yield component traits correlations and path coefficient analysis in some KAFACI doubled haploid and other rice {Oryza sativa L} genotypes. The experiment was laid out in a Randomized Complete Block Design {RCBD} with 3 replications at Lifuwu Agricultural Research Station trial fields during the 2018/2019 and 2019/2020 rainy seasons. Eight selected traits namely number of productive tillers per hill, spikelets per panicle, panicle length, days to 50% flowering, days to maturity, 1000 grain weight, and grain yield were considered in this study. ANOVA table illustrated significant differences (p

Published
2021
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