Characteristics of Photosynthesis and Antioxidation in Rice Photo-oxidation Mutant 812HS

Xu, Jingang; Chuangen, Lu; Liu, Li; Lu, C; Ma, Jing; Shi-jian, Xia; Chen, Guoxiang; Gao, Zhengyuan

doi:10.3724/sp.j.1006.2016.00574

Cited by 8 publications

(8 citation statements)

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“…Comparatively, grain shape would be an index more suitable for eld selection before harvest. Correlations between milling quality and grain shape traits were previously noted by phenotypic correlation with cultivars (Xu et al 2004). It's notable that QTL mapping with single set of introgression lines have provided some different views (Hu et al 2011;Li et al 2004;Zheng et al 2007).…”

Section: Introductionmentioning

confidence: 79%

Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Emelin

Qiu

Fan

et al. 2023

Preprint

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Milling quality (MQ) and grain shape (GS) of rice (Oryza sativa L.) are correlated traits and both determining farmers’ final profit. More than one population under multiple environments may provide valuable information for breeding selection on this MQ-GS correlations. However, suitable analytical methods for reciprocal introgression lines with linkage map for this kind of correlation remains unclear. In this study, our objectives were (1) to provide a set of reciprocal introgression lines (composed by two BC2RIL populations) suitable for mapping by linkage mapping using markers/bins with physical positions; (2) to test mapping effect by MQ-GS correlation dissection by different mapping methods; (3) to perform genetic and breeding simulation to pyramid favorite alleles of QTLs for representative MQ-GS traits. Finally, with four analysis methods and data collected under five environments, we identified about 28.4 loci in average for MQ-GS traits. It’s notable that 52.3% of these loci were commonly detected by different methods and eight loci were novel. There were also nine regions harboring loci for different MQ-GS traits which may be underlying the MQ-GS correlations. Background independent (BI) loci were also found for each MQ and GS trait. All these information may provide useful data for rice molecular breeding.

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Section: Introductionmentioning

confidence: 79%

Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Emelin

Qiu

Fan

et al. 2023

Preprint

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“…The 812HS rice line (Oryza sativa L. indica cultivar) was grown in pots under natural light (PFD 2500-3000 µmol·m -2 ·s -1 ) and shade (PFD 600-800 µmol·m -2 ·s -1 ). The flag leaves were spread and collected (Xu et al, 2016). The samples were immediately frozen in liquid nitrogen and kept at -80°C until the protein extraction step (Yang et al, 2006).…”

Section: Rice Materialsmentioning

confidence: 99%

Proteomics analysis of the photo-oxidation mutant 812HS rice (Oryza sativa L.) exposed to high light intensity

Lv¹,

Ma²,

Yuan³

et al. 2016

Plant Omics

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The 812HS rice line, a mutant of two-line sterile rice, exhibits leaf photo-oxidation during the tillering-jointing stage since its chloroplasts are susceptible to damage induced by strong sunlight. To determine the proteomic response to light intensity, the 812HS rice line was exposed to natural light and shade (about one fourth natural light), and two-dimensional electrophoresis in combination with matrix-assisted laser desorption/ionization time-of-flight/time-of-flight mass spectrometry was used to compare the proteomic expressions in the rice leaves. Although over 1000 reproducible proteins were detected, only 9.61 % of them displayed differential expression with 1.5-fold abundance. A search of the National Center for Biotechnology Information database revealed 53 proteins, 34 down-regulated and 19 up-regulated under highlight. Among these identified proteins, six ones were related to disease and defense, implying the defense and protection mechanism was built under strong light stress. The increase in S-adenosylmethionine synthetase involved in the biosynthesis of the phytohormone ethylene might contribute to the phenotypic modulation from green to etiolation in photo-oxidation-sensitive leaves. These results suggest the existence of a complex regulatory mechanism of the proteomes in photo-oxidation-sensitive 812HS rice under light stress.

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“…Grain size and shape are closely linked to head rice recovery. Increased grain length, length to width or length‐to‐thickness ratio negatively regulates rice milling quality, whereas increased grain width and thickness could improve rice milling quality (Wang et al ., 2005; Xu et al ., 2004). Usually, japonica varieties with short grains could produce higher HRY than indica varieties, although there are some exceptions (Goodman and Rao, 1985).…”

Section: Introductionmentioning

confidence: 99%

The elite eating quality alleles Wx^b and ALK^b are regulated by OsDOF18 and coordinately improve head rice yield

Zhu,

Liu,

Jiao

et al. 2024

Plant Biotechnology Journal

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SummaryHead rice yield (HRY) measures rice milling quality and determines final grain yield and commercial value. Here, we report that two major quantitative trait loci for milling quality in rice, qMq‐1 and qMq‐2, represent allelic variants of Waxylv/Waxyb (hereafter Wx) encoding Granule‐Bound Starch Synthase I (GBSSI) and Alkali Spreading Value ALKc/ALKb encoding Soluble Starch Synthase IIa (SSIIa), respectively. Complementation and overexpression transgenic lines in indica and japonica backgrounds confirmed that Wx and ALK coordinately regulate HRY by affecting amylose content, the number of amylopectin branches, amyloplast size, and thus grain filling and hardness. The transcription factor OsDOF18 acts upstream of Wx and ALK by activating their transcription. Furthermore, rice accessions with Wxb and ALKb alleles showed improved HRY over those with Wxlv and ALKc. Our study not only reveals the novel molecular mechanism underlying the formation of HRY but also provides a strategy for breeding rice cultivars with improved HRY.

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Characteristics of Photosynthesis and Antioxidation in Rice Photo-oxidation Mutant 812HS

Cited by 8 publications

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Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Proteomics analysis of the photo-oxidation mutant 812HS rice (Oryza sativa L.) exposed to high light intensity

The elite eating quality alleles Wx^b and ALK^b are regulated by OsDOF18 and coordinately improve head rice yield

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Characteristics of Photosynthesis and Antioxidation in Rice Photo-oxidation Mutant 812HS

Cited by 8 publications

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Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Identification and designed QTL breeding of reliable QTLs for milling quality and grain shape in the reciprocal introgression lines in rice

Proteomics analysis of the photo-oxidation mutant 812HS rice (Oryza sativa L.) exposed to high light intensity

The elite eating quality alleles Wxb and ALKb are regulated by OsDOF18 and coordinately improve head rice yield

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Resources

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The elite eating quality alleles Wx^b and ALK^b are regulated by OsDOF18 and coordinately improve head rice yield