Identification and fine mapping of a new bacterial blight resistance gene, <i>Xa43(t)</i>, in Zhangpu wild rice (<i>Oryza rufipogon</i>)

Huang, Feng; He, Ning; Yu, Mingxiang; Li, D; Yang, Dewei

doi:10.1111/plb.13502

Cited by 5 publications

(4 citation statements)

References 41 publications

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“…Zhang [33] demonstrated that the introduction of wild rice alleles into cultivated rice significantly improved yield under drought conditions. Similarly, Huang [34] found that some wild rice species possess genes that confer resistance to bacterial blight. Yuan [35] also showed that wild rice germplasms also contain genes related to cold tolerance.…”

Section: Discussionmentioning

confidence: 98%

Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza

Kumar

Yer

2023

Crops

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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 the ferrous to ferric forms, which are not easily available to rice crops, resulting in iron-deficiency-induced chlorosis (IDIC) and causing significant reductions in yield. Cultivated rice accessions have limited variations in IDIC tolerance, while the wild Oryza germplasm could be a potential source of IDIC tolerance. In this study, 313 Oryza accessions were evaluated for IDIC tolerance at the tillering stage under aerobic conditions and 20 IDIC-tolerant lines were identified. The twenty lines showed no signs of chlorosis and had high levels of iron content and SPAD values, while the 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 that these lines were efficient in iron uptake and utilization, resulting in maintained high chlorophyll and leaf area index. These accessions may be useful for developing IDIC-tolerant cultivars for aerobic rice cultivation and future studies of the molecular basis of IDIC tolerance.

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Section: Discussionmentioning

confidence: 98%

Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza

Kumar

Yer

2023

Crops

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“…Zhang [28] demonstrated that the introduction of wild rice alleles into cultivated rice significantly improved yield under drought conditions. Similarly, Huang [29] found that some wild rice species possess genes that confer resistance to bacterial blight. Yuan [30] also showed that wild rice germplasm also contains genes related to cold tolerance.…”

Section: Discussionmentioning

confidence: 98%

Identification of Iron Deficiency Induced Chlorosis Tolerant Lines from Wild Rice Germplasm

Kumar¹,

Yer²

2023

Preprint

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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.

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“…Different rice varieties have multiple different BB resistance genes. The BB resistance gene Xa43 was recently identified in Zhangpu wild rice (Oryza rufipogon) (Huang et al, 2023). A new NLR disease resistance gene Xa47 has long-term resistance to rice BB disease (Lu et al, 2022b).…”

Section: Bacterial Blight Resistancementioning

confidence: 99%

Deciphering the roles of unknown/uncharacterized genes in plant development and stress responses

Wang,

Yuan

2023

Front. Plant Sci.

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In recent years, numerous genes that encode proteins with specific domains that participate in different biological processes or have different molecular functions have been identified. A class of genes with typical domains whose function has rarely been identified and another type of genes with no typical domains have attracted increasing attentions. As many of these so-called as unknown/uncharacterized (U/U) genes are involved in important processes, such as plant growth and plant stress resistance, there is much interest in deciphering their molecular roles. Here, we summarize our current understanding of these genes, including their structures, classifications, and roles in plant growth and stress resistance, summarize progress in the methods used to decipher the roles of these genes, and provide new research perspectives. Unveiling the molecular functions of unknown/uncharacterized genes may suggest strategies to fine-tune important physiological processes in plants, which will enrich the functional network system of plants and provide more possibilities for adaptive improvement of plants.

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Identification and fine mapping of a new bacterial blight resistance gene, Xa43(t), in Zhangpu wild rice (Oryza rufipogon)

Cited by 5 publications

References 41 publications

Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza

Genetic Variation in Tolerance to Iron Deficiency among Species of Oryza

Identification of Iron Deficiency Induced Chlorosis Tolerant Lines from Wild Rice Germplasm

Deciphering the roles of unknown/uncharacterized genes in plant development and stress responses

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