Mapping quantitative trait loci associated with arsenic accumulation in rice (<i>Oryza sativa</i>)

Zhang, Jing; Zhu, Yan; Zeng, Dali; Cheng, Wenjian; Qian, Qian; Duan, Guilan

doi:10.1111/j.1469-8137.2007.02267.x

Cited by 101 publications

(72 citation statements)

References 29 publications

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“…The similar results was reported by Zhang et al (2008) when they studied arsenic (As) accumulation at rice seedlings. For successful QTL mapping, Li et al (1995) reported that large phenotypic diVerence between the parents in the objective quantitative traits is not always prerequisite.…”

Section: Discussionsupporting

confidence: 86%

Mapping of QTLs associated with cadmium tolerance and accumulation during seedling stage in rice (Oryza sativa L.)

2008

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Cadmium (Cd) is a non-essential element and toxic to plants. To investigate the genetics of Cd tolerance and accumulation in rice, quantitative trait loci (QTL) associated with Cd tolerance and accumulation at the seedling stage were mapped using a doubled haploid (DH) population derived from a cross between a japonica JX17 and an indica ZYQ8. A total of 22 QTLs were found to be associated with shoot height (SH), root length (RL), shoot dry weight (SDW), root dry weight (RDW), total dry weight (TDW) and chlorophyll content (CC), and 10 and 12 QTLs were identiWed under the control and Cd stress conditions, respectively. For Cd tolerant coeYcient (CTC), 6 QTLs were detected on chromosomes 1, 3, 5, 8 and 10. Under Cd stress, 3 QTLs controlling root and shoot Cd concentrations were mapped on chromosome 6 and 7. One QTL for shoot/root rate of Cd concentration was identiWed on chromosome 3. The results indicated that Cd tolerance and accumulation were quantitatively inherited, and the detected QTLs may be useful for marker-assistant selection (MAS) and identiWcation of the genes controlling Cd tolerance and accumulation in rice.

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Section: Discussionsupporting

confidence: 86%

Mapping of QTLs associated with cadmium tolerance and accumulation during seedling stage in rice (Oryza sativa L.)

2008

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“…Genes involved in rice phosphate transport have also been shown to be regulated by arsenate exposure (37). Evidence from mapping of quantitative trait loci (QTL) has identified a region on chromosome 8 of rice, that is responsible for increasing shoot P concentration and decreasing grain As concentration (38). Additionally, in a different rice mapping population, a region on chromosome 5 has been identified as increasing shoot P concentration and deceasing shoot As concentration (39).…”

Section: Discussionmentioning

confidence: 99%

Arsenic Shoot-Grain Relationships in Field Grown Rice Cultivars

Norton

Islam

Duan

et al. 2010

Environ. Sci. Technol.

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Arsenic (As) accumulation in rice grains is a risk to human health. The mechanism of transfer of As from the shoot into the grain during grain filling is unknown at present. In this study As speciation in the shoot and grains at maturity were examined, and the relationships between phosphorus (P) and As, and silicon (Si) and As were established in a wide range of cultivars grown in As contaminated field trials in Bangladesh and China. No correlations were observed between shoot and grain speciation, with the inorganic form comprising 93.0-97.0% of As in the shoot and 63.0-83.7% in the grains. The percentage of dimethylarsinic acid (DMA) was between 1.4 and 6.6% in the shoot and 14.6 and 37.0% in the grains; however, the concentrations were comparable, ranging from 0.07 to 0.26 mg kg -1 in the shoots and 0.03 to 0.25 mg kg -1 in the grains. A positive correlation was observed between shoot As and shoot Si, however, no correlation was observed between shoot Si and grain As. A significant negative correlation was observed between shoot P and grain As concentrations. These results suggest that the translocation of As into the grain from the shoots is potentially using P rather than Si transport mechanisms. The findings also indicate that inorganic As and DMA translocation to the grain differ considerably.

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“…In plants, arsenic tolerance is critical for adaptation to specific soils and has determined plant distribution 4,5 ; the molecular mechanisms are analyzed mainly by studying proteins presumably involved in arsenate (As(V)) tolerance based on sequence homology with bacterial and yeast proteins 6,7 . Genetic approaches are little used to study As(V) tolerance mechanisms [8][9][10][11][12] , and the genes implicated in natural intraspecific variation are unknown [13][14][15] .…”

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confidence: 99%

Natural variation in arsenate tolerance identifies an arsenate reductase in Arabidopsis thaliana

et al. 2014

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The enormous amount of environmental arsenic was a major factor in determining the biochemistry of incipient life forms early in the Earth's history. The most abundant chemical form in the reducing atmosphere was arsenite, which forced organisms to evolve strategies to manage this chemical species. Following the great oxygenation event, arsenite oxidized to arsenate and the action of arsenate reductases became a central survival requirement. The identity of a biologically relevant arsenate reductase in plants nonetheless continues to be debated. Here we identify a quantitative trait locus that encodes a novel arsenate reductase critical for arsenic tolerance in plants. Functional analyses indicate that several non-additive polymorphisms affect protein structure and account for the natural variation in arsenate reductase activity in Arabidopsis thaliana accessions. This study shows that arsenate reductases are an essential component for natural plant variation in As(V) tolerance.

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Mapping quantitative trait loci associated with arsenic accumulation in rice (Oryza sativa)

Cited by 101 publications

References 29 publications

Mapping of QTLs associated with cadmium tolerance and accumulation during seedling stage in rice (Oryza sativa L.)

Mapping of QTLs associated with cadmium tolerance and accumulation during seedling stage in rice (Oryza sativa L.)

Arsenic Shoot-Grain Relationships in Field Grown Rice Cultivars

Natural variation in arsenate tolerance identifies an arsenate reductase in Arabidopsis thaliana

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