Improvement in anaerobic germination potential and grain yield of rice (oryza sativa) through seed priming

Senapati, Swetaleena; Kuanar, SR; Sarkar, Ramani Kumar

doi:10.3329/sja.v17i1.42760

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…Thus, it is an economical and environmentally friendly choice ( Kumar and Ladha, 2011 ; Zhang et al., 2015 ). Despite the risk of low germination in DSR caused by soil flooding ( Senapati et al., 2019 ), its cost-effectiveness and convenience have made it a widespread practice globally ( Yang et al., 2019 ). However, modern rice varieties do not germinate well when submerged in water, due to the lack of coleoptile elongation and the negative impact of long periods of oxygen deprivation on root and shoot development ( Magneschi and Perata, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Genomic landscape of the OsTPP7 gene in its haplotype diversity and association with anaerobic germination tolerance in rice

Aung

Maung

et al. 2023

Front. Plant Sci.

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Early season flooding is a major constraint in direct-seeded rice, as rice genotypes vary in their coleoptile length during anoxia. Trehalose-6-phosphate phosphatase 7 (OsTPP7, Os09g0369400) has been identified as the genetic determinant for anaerobic germination (AG) and coleoptile elongation during flooding. We evaluated the coleoptile length of a diverse rice panel under normal and flooded conditions and investigated the Korean rice collection of 475 accessions to understand its genetic variation, population genetics, evolutionary relationships, and haplotypes in the OsTPP7 gene. Most accessions displayed enhanced flooded coleoptile lengths, with the temperate japonica ecotype exhibiting the highest average values for normal and flooded conditions. Positive Tajima’s D values in indica, admixture, and tropical japonica ecotypes suggested balancing selection or population expansion. Haplotype analysis revealed 18 haplotypes, with three in cultivated accessions, 13 in the wild type, and two in both. Hap_1 was found mostly in japonica, while Hap-2 and Hap_3 were more prevalent in indica accessions. Further phenotypic performance of major haplotypes showed significant differences in flooded coleoptile length, flooding tolerance index, and shoot length between Hap_1 and Hap_2/3. These findings could be valuable for future selective rice breeding and the development of efficient haplotype-based breeding strategies for improving flood tolerance.

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Section: Introductionmentioning

confidence: 99%

Genomic landscape of the OsTPP7 gene in its haplotype diversity and association with anaerobic germination tolerance in rice

Aung

Maung

et al. 2023

Front. Plant Sci.

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“…His result revealed that seed priming improved the seedling establishment under anaerobic conditions. Recently, it was observed that rice seed priming followed by sun drying can improve anaerobic germination (Senapati et al, 2019). Angaji et al (2010) identified a few tolerant genotypes of over 8000 genotypes screened for the tolerance of flooding during germination.…”

Section: Introductionmentioning

confidence: 99%

Mining Favorable Alleles for Rice Coleoptile Elongation Length Sensitivity to Exogenous Gibberellin Under Submergence Condition

Abdulmajid

Ali

Eltahawy

et al. 2020

J Plant Growth Regul

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High sensitivity of rice coleoptile elongation length to exogenous gibberellin is a beneficial trait to utilize superior rice cultivars that could not be used originally under water direct-seeded conditions. In the present study, we mined favorable alleles for the trait by combining the phenotypic data of 358 rice accessions with their genotype data of 262 simple sequence repeat (SSR) markers via genome wide association mapping method. Totally, 17 SSR marker loci significantly associated with gibberellin sensitivity index (GSI) of coleoptile elongation length under 10 cm depth of water, were detected by general linear model and mixed linear model across two years, with percent phenotypic variation explained larger than 10%. Twenty nine favorable alleles for GSI on the 17 loci were discovered with phenotypic effect value (PEV) larger than 0.1 cm/cm and RM6869-110 bp showed the largest PEV (0.27 cm/cm). Based on PEV of marker-alleles having positive effects on GSI, seven parental combinations were predicted to improve GSI. In addition, 7 loci for GSI were co-located with loci associated with coleoptile elongation length per se, and one locus (RM1182 on chromosome 5) was co-located with that associated with coleoptile elongation length after gibberellin-soaked seed, under germination condition of 10 cm depth of water. These favorable allele(s) could be used to improve two target traits simultaneously.

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Leaching and volatilization of nitrogen in paddy rice under different nitrogen management

Islam,

Rahman,

Alam

et al. 2024

Nutr Cycl Agroecosyst

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Improvement in anaerobic germination potential and grain yield of rice (oryza sativa) through seed priming

Cited by 5 publications

References 11 publications

Genomic landscape of the OsTPP7 gene in its haplotype diversity and association with anaerobic germination tolerance in rice

Genomic landscape of the OsTPP7 gene in its haplotype diversity and association with anaerobic germination tolerance in rice

Mining Favorable Alleles for Rice Coleoptile Elongation Length Sensitivity to Exogenous Gibberellin Under Submergence Condition

Leaching and volatilization of nitrogen in paddy rice under different nitrogen management

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