Quantitative trait loci regulate the concentrations of steryl ferulates in brown rice

Nakano, Hiroshi; Takai, Toshiyuki; Kondo, Motohiko

doi:10.1002/cche.10099

Cited by 13 publications

(33 citation statements)

References 20 publications

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“…These results corroborate the findings of Kato et al (2017) who compared the GO concentration between Indica and Japonica varieties, reporting there are quantitative trait loci (QTL's) responsible for GO concentrations; the authors also referred a significantly higher GO concentration in Japonica types compared with Indica types (Kato et al, 2017). Nakano et al (2018) studied the genetic differences between Japonica and Indica types regarding the major compounds of GO (24-MCAF, and CAF), reporting there are alleles from Japonica type varieties that can be used to improve GO concentration on Indica types. Those findings can contribute to the genetic improvement of rice regarding its GO content.…”

Section: Rice Bran Go Contentsupporting

confidence: 88%

“…Stress conditions as temperature or drought may also be a factor affecting the GO content, and 4.5 o C temperature increase resulted in higher GO values, mainly on the 24MCAF fraction (Britz et al, 2007); the sterol content and steryl ester fractions of two cultivars seemed to increase when subjected to water stress through 3, 6, 9 and 12 days (Kumar and Krishna, 2015). Genetics also plays an important role regarding the GO content, as some specific alleles may be responsible for GO concentration (Kato et al, 2017;Nakano et al, 2018). Nakano et al (2018) studied the progenies from the cross of indica and japonica germplasm, by analysing 80 lines concluded that alleles from the japonica type may improve GO, 24MCAF and CAF concentrations in indica types, while indica type alleles may be used to improve CAF concentrations in japonica types.…”

Section: Introductionmentioning

confidence: 99%

“…Genetics also plays an important role regarding the GO content, as some specific alleles may be responsible for GO concentration (Kato et al, 2017;Nakano et al, 2018). Nakano et al (2018) studied the progenies from the cross of indica and japonica germplasm, by analysing 80 lines concluded that alleles from the japonica type may improve GO, 24MCAF and CAF concentrations in indica types, while indica type alleles may be used to improve CAF concentrations in japonica types.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

et al. 2020

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Gamma-oryzanol is a compound present on rice bran, which has been studied for its bioactive properties, including its cytotoxic activity. The gamma-oryzanol biosynthesis occurs on the lipidic membrane of the plant and can be influenced by edaphoclimatic grown conditions. Two Portuguese rice varieties (Ceres and Maçarico) from 6 growing environments were analysed in order to explore the influence of the growing conditions on the gamma-oryzanol content, its constituents, and cytotoxic effect against 4 human tumour cell lines (NCI-H460, HeLa, HepG2, and MCF -7). The overall variability of gamma-oryzanol concentration was from 1.56 g / Kg to 3.19 g / Kg, Ceres reveals higher values than Maçarico; those concentrations also varied with the growing environment. The environment was also determinant for the individual concentration of the 3 gamma-oryzanol compounds (cycloartenyl ferulate, 24-methylenecycloartanyl ferulate, and campesteryl ferulate). A cytotoxic effect was observed for all the tested tumour cell lines and also varied with the growing environment.

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Section: Rice Bran Go Contentsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

et al. 2020

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“…In addition, there are apparent variations in the contents of these compounds among rice cultivars (Bergman & Xu, 2003;Heineman et al, 2008;Huang & Ng, 2011;Kato et al, 2017;Ng et al, 2013). Several quantitative trait loci have been identified for the contents of gOZ (Kato et al, 2017;Nakano et al, 2018) and vitamin E derivatives (Zhang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Distribution of γ-oryzanol in the outer layers of brown rice and its variation among cultivars

Kato

Horibata

2020

Plant Production Science

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Rice (Oryza sativa L.) bran accumulates many compounds that are associated with the promotion and maintenance of human health, such as γ-oryzanol (gOZ) and γ-aminobutyric acid (GABA). These beneficial compounds in the bran fraction are mostly removed in polished rice. The present study sought rice cultivars with high concentrations of gOZ, and also of GABA, in polished rice, and examined the distribution of gOZ content in the outer layers of brown rice. The effects of germination treatment were also examined as a means to enrich gOZ and GABA in polished rice. GABA concentration showed no significant variation among 19 cultivars in polished rice, whereas a wide variation was detected in brown rice, for which cultivar Kinuhikari had the highest amount. Germination treatment for 5 h significantly enhanced GABA concentration. gOZ concentrations also showed a wide variation among cultivars in both brown rice and polished rice, with no clear correlation. Hattan, a sake-brewing cultivar, exhibited the highest gOZ concentration in polished rice. This cultivar involved higher gOZ in the outermost layer of polished rice, whereas it had a lower content in the bran fraction. This permeation of gOZ into polished rice might be related to the endosperm properties characteristic to sake-brewing cultivars. In contrast to GABA, gOZ concentration did not increase with germination treatment in brown rice or polished rice. Because the gOZ concentration in polished rice was insufficient even in the Hattan cultivar, breeding and/or other processing techniques are needed to obtain gOZ-enriched polished rice. Percentages of γ-oryzanol (gOZ) content in different layers and the core of brown rice. (a) Comparison among layers and the core in each of six rice cultivars, and (b) comparison among six cultivars in each of the layers and the core. Means with the same letter did not differ significantly at the 0.01 probability level, within each cultivar (a) and within each layer or the core (b). See text for layers and core.

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“…18,19 More recently, we have identified QTLs for the concentration of γ-oryzanol using the CSSLs. 14…”

Section: Introductionmentioning

confidence: 99%

Identification of Quantitative Trait Loci for the Concentrations of Phenylpropanoid Glycosides in Brown Rice

2019

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Rice (Oryza sativa L.) is a staple food for most of the world’s population, as it is eaten by nearly half of its inhabitants. Phenylpropanoid glycosides derived from plants have various biomedical effects. The comparison of the concentrations of the four major phenylpropanoid glycosides in brown rice, i.e., 6-O-feruloylsucrose (1), 3′,6-di-O-sinapoylsucrose (2), 3′-O-sinapoyl-6-O-feruloylsucrose (3), and 3′,6-di-O-feruloylsucrose (4), between a conventional japonica-type cultivar Koshihikari and a high-yielding indica-type cultivar Takanari revealed that they were 57–162% higher in Koshihikari than in Takanari. To identify quantitative trait loci (QTLs) for the concentrations of these compounds (1–4), reciprocal chromosome segment substitution lines derived from a cross between Koshihikari and Takanari were analyzed. We identified QTLs for the concentrations of compound 1 on chromosome 2 and of compound 2 on chromosome 4 in the reciprocal genetic background. The concentrations of these compounds were increased by the Koshihikari alleles and decreased by the Takanari alleles. Therefore, the favorable alleles of Koshihikari are available to ameliorate the lower concentrations of compounds 1 and 2 in Takanari. The combinations of QTLs identified in the present study together with those of other biologically active compounds make it possible to breed health beneficial cultivars.

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Quantitative trait loci regulate the concentrations of steryl ferulates in brown rice

Cited by 13 publications

References 20 publications

Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

Distribution of γ-oryzanol in the outer layers of brown rice and its variation among cultivars

Identification of Quantitative Trait Loci for the Concentrations of Phenylpropanoid Glycosides in Brown Rice

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