Designing New Screening Methods and Physiological Dissection of Anaerobic Stress Tolerance in Rice

Partheeban, C.; Srividhya, S.; Raveendran, M.; Vijayalakshmi, D.

doi:10.20546/ijcmas.2017.605.067

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…The root growth that is considered a critical trait for good anchorage of germinated seedlings under anaerobic conditions was observed with a mean value of 26.6 cm, ranging from 5.8 cm to 32.4 cm. The trait seedling dry weight has exhibited a mean value of 6.78 mg, ranging from 2 mg to 15 mg (17).…”

Section: Resultsmentioning

confidence: 99%

Exploring rice genotypes for anaerobic germination: Towards sustainable direct seeding

Vijaya Kumar Reddy,

Panda

et al. 2024

Plant Sci. Today

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Direct-seeded rice (DSR) production is the primary focus of this study, which explores the diversity of rice genotypes concerning their ability to withstand anaerobic germination conditions. Using advanced statistical analysis, a total of 250 rice cultivars were assessed for several anaerobic germination attributes. Significant variability was observed among genotypes for key traits including germination % (ARC14855, AG 387), shoot length and seedling dry weight, indicating potential donors for anaerobic germination tolerance. Trait association analysis, variability analysis, principal component analysis and cluster analysis were employed to uncover the genetic and phenotypic factors influencing anaerobic germination tolerance. The genotypes of cluster III could be used as donors for anaerobic germination studies, as the genotypes have revealed high average values for all the traits. The findings underscore the importance of genetic variability and heritability in breeding resilient rice varieties suited for DSR cultivation, offering valuable insights for enhancing rice cultivation practices in the face of challenges such as water scarcity and labour shortages. To improve the sustainability and productivity of paddy production systems, this research advances rice breeding procedures that aim to create varieties tolerant to anaerobic conditions.

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Section: Resultsmentioning

confidence: 99%

Exploring rice genotypes for anaerobic germination: Towards sustainable direct seeding

Vijaya Kumar Reddy,

Panda

et al. 2024

Plant Sci. Today

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“…In this study, the 10 potential genotypes identified exhibited significantly higher survival rates under limited oxygen conditions, characterized by increased germination, seedling growth, and biomass accumulation compared to other genotypes. Partheeban et al (2017) also reported greater seedling vigor in highly tolerant cultivars compared to moderate and susceptible ones under anaerobic stress. Furthermore, Mondal et al (2020) found that genotypes tolerant to anaerobic stress displayed higher amylase activities, resulting in increased germination and subsequent seedling growth.…”

Section: Variation In Performancementioning

confidence: 87%

Screening of potential donors for anaerobic stress tolerance during germination in rice

Mwakyusa,

Heredia,

Kilasi

et al. 2023

Front. Plant Sci.

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The rising cost of transplanting rice has made direct seeding an affordable alternative for rice establishment, particularly in Africa. However, direct seeding, while cost-effective, faces crop establishment challenges due to flooding. Uncontrolled water, driven by erratic rains in low-lying areas or uneven fields, limit germination. Rice possesses the unique ability of anaerobic germination, enabling it to sprout and emerge in oxygen-deprived conditions. Understanding rice’s response to anaerobic stress during germination is crucial for resilience breeding. Africa, although relying on direct seeding, has made limited progress in addressing flooding during germination compared to Asia. Anaerobic stress tolerance ensures successful crop emergence even in oxygen-limited environments and can help suppress weeds, a significant challenge in direct-seeded rice cultivation. This study aims to contribute by screening for potential rice donors exhibiting anaerobic stress tolerance. We screened 200 rice genotypes at Sokoine University of Agriculture (SUA) in Morogoro, Tanzania, primarily focusing on landraces with untapped potential. Using an alpha lattice design, we conducted two anaerobic experiments in September and October 2022, adding 7 cm of standing water immediately after dry seeding for flooded and maintaining a 2 cm water level after germination in the control for duration of 21 days. We identified potential donors based on selection index computed from genomic estimated breeding values (GEBVs) using eight variables: germination at 14 DAS, germination at 21 DAS, seedling height at 14 DAS, seedling height at 21 DAS, shoot dry matter at 21 DAS, root dry matter at 21 DAS, culm diameter at 21 DAS, and root length at 21DAS. Ten genotypes emerged as the most promising, exhibiting at least 70% germination in floodwater at 21 DAS and greater selection indices. These genotypes were like: Afaa Mwanza 1/159, Rojomena 271/10, Kubwa Jinga, Wahiwahi, Magongo ya Wayungu, Mpaka wa Bibi, Mwangaza, Tarabinzona, IB126-Bug 2013A, and Kanamalia with respective percentages of 75, 74, 71, 86, 75, 80, 71, 80, 70, and 73. These findings contribute to global efforts to mitigate the impacts of flooding during germination. These donors, will be potential to enrich the gene pool for anaerobic germination, providing valuable resources for breeding for flooding tolerance.

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Designing New Screening Methods and Physiological Dissection of Anaerobic Stress Tolerance in Rice

Cited by 2 publications

References 12 publications

Exploring rice genotypes for anaerobic germination: Towards sustainable direct seeding

Exploring rice genotypes for anaerobic germination: Towards sustainable direct seeding

Screening of potential donors for anaerobic stress tolerance during germination in rice

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