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Identification of Iron Deficiency Induced Chlorosis Tolerant Lines from Wild Rice Germplasm
Version 1
: Received: 4 April 2023 / Approved: 5 April 2023 / Online: 5 April 2023 (11:34:36 CEST)
A peer-reviewed article of this Preprint also exists.
Kumar, R.; Yer, H. Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza. Crops 2023, 3, 184-194. Kumar, R.; Yer, H. Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza. Crops 2023, 3, 184-194.
Abstract
Transplanted rice cultivation has caused groundwater depletion in several regions globally. Direct-seeded rice under aerobic conditions is a water-saving alternative. However, under aerobic conditions, iron in the soil is oxidized from ferrous to ferric, which is not easily available for rice, resulting in iron deficiency induced chlorosis (IDIC) causing significant reduction in yield. Cultivated rice genotypes have limited variations for IDIC tolerance, while wild Oryza germplasm could be a potential source for IDIC tolerance. In this study, 313 Oryza accessions were evaluated for IDIC tolerance at the tillering stage under aerobic conditions and twenty IDIC tolerant lines were identified. The twenty lines showed no signs of chlorosis and had high levels of iron content and SPAD values, while eight cultivated controls exhibited varying degrees of chlorosis symptoms and low levels of SPAD and iron content. To confirm their tolerance, the selected lines were evaluated again in a subsequent year, and they showed comparable levels of tolerance indicating these lines were efficient in iron uptake and utilization resulted maintained high chlorophyll and leaf area index. These accessions may be useful for developing IDIC-tolerant cultivars for aerobic rice cultivation and future study of molecular basis of IDIC tolerance.
Keywords
Aerobic Rice; Chlorosis; Iron Deficiency; Oryza; Wild Germplasm; IDIC; SPAD
Subject
Biology and Life Sciences, Plant Sciences
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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