Variation of grain nutritional quality among Thai purple rice genotypes grown at two different altitudes

Rerkasem, Benjavan; Jumrus, Suchada; Yimyam, Narit; Prom‐u‐thai, Chanakan

doi:10.2306/scienceasia1513-1874.2015.41.377

Cited by 27 publications

(16 citation statements)

References 27 publications

(32 reference statements)

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“…The highland rice germplasm may also contribute to satisfying the growing market interest in special quality rice, e.g., varieties with pigmented pericarp and novel bioactive compounds (Boonsit et al, 2010;Saetan 2010;Yodmanee et al, 2011;BRRD, 2012;Panomjan et al, 2016). However, the strong effect of genotype by environment interaction (G x E) on special quality traits and grain Zn density (Rerkasem et al, 2015) must be taken into account. Local rice varieties are named by a highly decentralized naming system, which is much less precise than the naming of varieties released from the national rice breeding programme.…”

Section: Discussionmentioning

confidence: 99%

Characterization of On-farm Rice Germplasm in an Area of the Crop’s Center of Diversity

Jamjod¹,

Yimyam²,

Lordkaew³

et al. 2017

CMUJNS

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The seed of rice (Oryza sativa L.) from the highlands of northern Thailand, which is located within the species' centre of diversity, constitutes some of the world's last local rice germplasm still retained on-farm, provides local farmers and communities with a readily accessible resource, and is a source of value-adding traits for rice breeding. This paper reports on the germplasm represented by 281 seed samples collected in 2013 from an area of the highlands between latitudes 17.76°N to 20.18°N and longitudes 97.76°E to 100.48°E. The samples were provided by farmers belonging to 10 ethnicities, in number that closely correlated with the groups' share of the highland population (r = 0.84; P < 0.01). Compared with the slender grain rice of the lowlands, the highland germplasm was distinctive in its grain shape, and classed as large grain type in the husk, and medium grain type as de-husked, brown rice. The rice, which was predominantly of non-glutinous grain type and grown mainly as upland rice, had generally higher iron concentrations than rice in the lowlands; thus demonstrating how an on-farm rice germplasm may directly benefit local farmers and communities who consume the rice they grow. In addition, potential value-adding traits were identified in varieties and seed samples with the highest zinc density and novel rice with pigmented pericarp and high anti-oxidative capacity.

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Section: Discussionmentioning

confidence: 99%

Characterization of On-farm Rice Germplasm in an Area of the Crop’s Center of Diversity

Jamjod¹,

Yimyam²,

Lordkaew³

et al. 2017

CMUJNS

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“…The positive correlation between total antioxidative activity of unpolished grain and its Zn concentration therefore suggested some promotional roles of the nutrient. Indeed, our previous investigation found that total antioxidant capacity in 9 pigmented rice genotypes varied in a multiple regression with anthocyanin and Zn concentration (Rerkasem et al, 2015a). This study also suggested DPPH method as the proper procedure to determine total antioxidative capacity among rice genotypes as FRAP method showed a limit detection of total antioxidant capacity in non-pigmented rice genotypes and in the pigmented genotype was not detected after 15 s polishing of rice grain due to very low amount of antioxidative compounds in non-pigmented genotypes in the bran layers.…”

Section: Discussionmentioning

confidence: 98%

“…This is an important process on mitigating their adverse effects on enzyme activity, integrity of polysaccharides, cell membrane and DNA and prevents cell death (Fridovich, 1983). Our previous investigation showed that the antioxidative capacity among different pigmented rice genotypes varied with Zn and anthocyanin concentration in a multiple regression (Rerkasem et al, 2015a).…”

Section: Introductionmentioning

confidence: 99%

Iron, Zinc and Total Antioxidant Capacity in Different Layers of Rice Grain among Different Varieties

Prom‐u‐thai¹,

Jamrus²,

Jaksomsak³

et al. 2016

IJAB

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In addition to being an important source of iron (Fe) and zinc (Zn) for rice consumers, rice also has a special value in its antioxidative capacity. This study explored how antioxidant capacity of the rice grain is associated with its Fe and Zn concentration, and how the relationship is affected by milling. Total antioxidant capacity and the concentration of Fe and Zn were determined in 5 rice genotypes in unpolished grain and after polishing for 15, 30, 45 or 60 s. Total antioxidant capacity of the unpolished grain was positively correlated with its Zn concentration both determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging (r = 0.60, p<0.05) and Fe reducing antioxidant power (FRAP) methods (r = 0.59, p<0.05), while the correlation with its Fe concentration was found by FRAP method (r= 0.62, p< 0.05), suggesting an involvement of the nutrients in anti-oxidative activity. The concentration of Zn, Fe and total antioxidant capacity determined by DPPH method declined with longer polishing, while FRAP method was not detected the capacity after 15 s polishing. The total antioxidant capacity determined by DPPH method remained positively correlated with Zn concentration regardless of polishing time from 0 s to 60 s (r = 0.62, p<0.001), but not with Fe (r = 0.12, not significant at p<0.05) concentration. These results suggested a possible role of Zn in some oxygen radicals scavenging system that was constant through different layers of rice grain tissue, but the involvement of Fe was less clear.

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“…Variasi pewarnaan dan kandungan antosianin juga ditunjukkan oleh variabel warna, semakin rendah tingkat kecerahan warna yang dikuantifikasi dalam variabel warna L*, maka semakin tinggi kandungan antosianin totalnya. Hal ini sesuai dengan Rerkasem et al (2015) yang menyebutkan tingkat kecerahan yang dikuantifikasi dalam variabel warna L* menunjuk-kan warna yang lebih intens yang ditemukan pada varietas lokal beras hitam KNL3 yang ditanam di dataran tinggi (L* = 22,85; kandungan antosianin = 62 mg/100 g) dan tidak pada varietas lokal KNL3 di dataran rendah (L* = 31,08; kandungan antosianin = 45 mg/100 g).…”

Section: Pengaruh Varietas Lokal Lokasi Dan Interaksi Keduanyaunclassified

“…Sedangkan 3 varietas yang lain (G1, G5, dan G6) justru memiliki kandungan antosianin yang lebih tinggi bila ditanam di dataran rendah dibandingkan bila ditanam di dataran sedang (Gambar 3). Perbedaan rerata suhu siang dan malam serta panjang hari di lokasi yang berbeda ketinggian, yang mempengaruhi perbedaan respon fisiologis tanaman, diduga sebagai faktor yang berpengaruh (Rerkasem et al 2015). Namun demikian, hasil analisis kandungan total antosianin dari tujuh varietas lokal, menunjukkan bahwa total kandungan antosianin di lokasi dataran medium lebih tinggi dibanding total kandungan antosianin di lokasi dataran rendah.…”

Section: Pengaruh Varietas Lokal Lokasi Dan Interaksi Keduanyaunclassified

Variation of Pigment and Anthocyanin Content of Local Black Rice from Yogyakarta on Two Altitude

Kristamtini¹,

Wiranti²,

Sutarno³

2018

BPN

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<p>There are several types of local black rice with different quality which well known in Yogyakarta. However, the altitude location affect to the quality and pigmentation of local black rice remains were unknown. The objectives of this research was to determine the variation of rice pigmentation and total anthocyanin content of Yogyakarta local black rice which planted on two different<br />altitudes location. This study was conducted from February to December 2015 with the experimental design using factorial experiment. The first factor is seven local black rice varieties from Yogyakarta (G) and second factor is two different altitude locations: lowlands (26 m asl) of Gulon, Sri Hardono, Pundong, Bantul (A1), and in medium lands (462 m asl) of Padasan, Pakembinangun, Pakem, Sleman (A2). The total anthocyanin content and rice pigmentation were observed. Three color variables for rice pigmentation, i.e. lightness (L*), greenness (a*), and yellowness (b*) were measured by Chroma Meter, Konica Minolta– Minolta CM-2006. The results showed that there was diversity on pigmentation and total anthocyanin content in the black rice grown at different altitude. Local variety Tugiyo Umur Panjang has any anthocyanin highest in the low altitude location (Bantul), while local variety Sembada Hitam was showed the highest anthocyanin at the height of the medium (Sleman). A positive<br />significant correlation was found among color variables, i.e. lightness (L*), greenness (a*), and yellowness (b*) and there was a negative significant correlation between total anthocyanin content and L*, a*, and b* color variables.</p>

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Variation of grain nutritional quality among Thai purple rice genotypes grown at two different altitudes

Cited by 27 publications

References 27 publications

Characterization of On-farm Rice Germplasm in an Area of the Crop’s Center of Diversity

Characterization of On-farm Rice Germplasm in an Area of the Crop’s Center of Diversity

Iron, Zinc and Total Antioxidant Capacity in Different Layers of Rice Grain among Different Varieties

Variation of Pigment and Anthocyanin Content of Local Black Rice from Yogyakarta on Two Altitude

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