scholarly journals Characterization of eating quality and starch properties of two Wx alleles japonica rice cultivars under different nitrogen treatments

2020 ◽  
Vol 19 (4) ◽  
pp. 988-998 ◽  
Author(s):  
Shuang-jie HUANG ◽  
Chun-fang ZHAO ◽  
Zhen ZHU ◽  
Li-hui ZHOU ◽  
Qing-huan ZHENG ◽  
...  
Keyword(s):  
Eating Quality ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Starch Properties ◽  
Nitrogen Treatments

scholarly journals Genomic Regions Involved in Differences in Eating and Cooking Quality Other than Wx and Alk Genes between indica and japonica Rice Cultivars

Rice ◽  
2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Kiyosumi Hori ◽  
Keitaro Suzuki ◽  
Haruka Ishikawa ◽  
Yasunori Nonoue ◽  
Kazufumi Nagata ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Heading Date ◽  
Rice Cultivar ◽  
Eating Quality ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Substitution Lines ◽  
Chromosome Segment Substitution Lines ◽  
Chromosome Segments

Abstract Background In temperate rice cultivation regions, japonica rice cultivars are grown preferentially because consumers deem them to have good eating quality, whereas indica rice cultivars have high grain yields and strong heat tolerance but are considered to have poor eating quality. To mitigate the effects of global warming on rice production, it is important to develop novel rice cultivars with both desirable eating quality and resilience to high temperatures. Eating quality and agronomic traits were evaluated in a reciprocal set of chromosome segment substitution lines derived from crosses between a japonica rice cultivar ‘Koshihikari’ and an indica rice cultivar ‘Takanari’. Results We detected 112 QTLs for amylose and protein contents, whiteness, stickiness, hardness and eating quality of cooked rice grains. Almost of ‘Koshihikari’ chromosome segments consistently improved eating quality. Among detected QTLs, six QTLs on chromosomes 1–5 and 11 were detected that increased whiteness and stickiness of cooked grains or decreased their hardness for 3 years. The QTLs on chromosomes 2–4 were not associated with differences in amylose or protein contents. QTLs on chromosomes 1–5 did not coincide with QTLs for agronomic traits such as heading date, culm length, panicle length, spikelet fertility and grain yield. Genetic effects of the detected QTLs were confirmed in substitution lines carrying chromosome segments from five other indica cultivars in the ‘Koshihikari’ genetic background. Conclusion The detected QTLs were associated with differences in eating quality between indica and japonica rice cultivars. These QTLs appear to be widely distributed among indica cultivars and to be novel genetic factors for eating quality traits because their chromosome regions differed from those of the GBSSI (Wx) and SSIIa (Alk) genes. The detected QTLs would be very useful for improvement of eating quality of indica rice cultivars in breeding programs.

scholarly journals Characterization of QTLs and Candidate Genes for Days to Heading in Rice Recombinant Inbred Lines

Genes ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 957 ◽  
Author(s):  
Youngjun Mo ◽  
Jong-Min Jeong ◽  
Su-Kyung Ha ◽  
Jinhee Kim ◽  
Changmin Lee ◽  
...  
Keyword(s):  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Heading Date ◽  
Additive Effect ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Breeding Programs ◽  
Days To Heading ◽  
Target Environment

Understanding the gene mechanisms controlling days to heading (DH) is important in rice breeding for adaption in the target environment. Using a recombinant inbred line population derived from the cross between two japonica rice cultivars, Koshihikari and Baegilmi, we identified three consistent quantitative trait loci (QTLs) for DH for two years, qDH3, qDH6, and qDH7 on chromosomes 3, 6, and 7, respectively. While Baegilmi contributed the allele for early heading at qDH6 and qDH7 with the additive effect of five days each, Koshihikari contributed the allele for early heading at qDH3 with the additive effect of three days. Notably, pyramiding two or more alleles for early heading at these QTLs accelerated heading effectively. Sequencing of Hd16, Hd1, and Ghd7, the previously known heading date genes underlying qDH3, qDH6, and qDH7, respectively, revealed that Baegilmi and Koshihikari carry different alleles at the three genes. Molecular markers were developed to screen the allelic compositions of the three genes among 295 Korean commercial rice cultivars. The results showed that few cultivars carry alleles for early heading at the three genes, highlighting that DH can be further accelerated and fine-tuned in breeding programs by combining the desirable alleles of Hd16, Hd1, and Ghd7.

scholarly journals The Influence of Nitrogen Application Level on Eating Quality of the Two Indica-Japonica Hybrid Rice Cultivars

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1663
Author(s):  
Xincheng Zhang ◽  
Liangbo Fu ◽  
Yishan Tu ◽  
Huifang Zhao ◽  
Liuhui Kuang ◽  
...  
Keyword(s):  
Hybrid Rice ◽  
Storage Proteins ◽  
Yield Potential ◽  
Eating Quality ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
N Level ◽  
Great Yield ◽  
Negative Effect

Indica-japonica hybrid rice cultivars show great yield potential but poor eating quality and require more nitrogen (N) input relative to japonica rice. However, the effect of N levels on the eating quality of indica-japonica hybrid rice is little known. A field experiment was carried out to investigate the effects of four N levels on two indica-japonica hybrid rice cultivars (Yongyou12 and Yongyou17) differing in eating quality. The results showed that the contents of amylose chains and water-insoluble storage proteins, especially prolamin, increased largely under a high N level, leading to deterioration of the rice-eating quality, although a low N level (100 N kg/ha) had a less negative effect on the eating quality. Moreover, both of the indica-japonica hybrids had high ratios of inferior grains (IG), and the ratio of IG increased with the N level. Grain weight and the immature ratio of IG were reduced and increased with the N level, respectively, which are also factors for deterioration of the eating quality. The two cultivars differed greatly in the responses of eating quality to the N level, with Yongyou17 being more sensitive than Yongyou12. The current results indicated that a high N level deteriorates the eating quality of indica-japonica hybrid rice mainly due to a large increase of IG.

Relationship between fatty acid composition and starch properties of 30 japonica rice cultivars

2018 ◽  
Vol 96 (2) ◽  
pp. 228-242 ◽  
Author(s):  
Sumiko Nakamura ◽  
Junji Katsura ◽  
Yasuhiro Maruyama ◽  
Ken'ichi Ohtsubo
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Starch Properties

scholarly journals Comparison of the Grain Quality and Starch Physicochemical Properties between Japonica Rice Cultivars with Different Contents of Amylose, as Affected by Nitrogen Fertilization

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 616
Author(s):  
Yajie Hu ◽  
Shumin Cong ◽  
Hongcheng Zhang
Keyword(s):  
Physicochemical Properties ◽  
Nitrogen Fertilizer ◽  
Grain Quality ◽  
Amylose Content ◽  
Eating Quality ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Relative Crystallinity ◽  
Cooked Rice ◽  
Peak Intensity

In order to determine the effects of nitrogen fertilizer on the grain quality and starch physicochemical properties of japonica rice cultivars with different contents of amylose, normal amylose content (NAC) and low amylose content (LAC) cultivars were grown in a field, with or without nitrogen fertilizer (WN). The relationships between the amylose content, starch physicochemical properties and eating quality were also examined. Compared with WN, nitrogen fertilizer (NF) significantly increased the grain yield but markedly decreased the grain weight. In addition, the processing quality tended to improve, but the appearance quality and eating quality deteriorated under NF application. The grain yield was similar between NAC and LAC cultivars. However, the grain quality and starch physicochemical properties were significantly different between NAC and LAC cultivars. The palatability of the cooked rice was significantly higher in the LAC than in NAC cultivar, which was due to its lower amylose content, protein content, hardness, and retrogradation enthalpy and degree, and its higher stickiness, peak viscosity, breakdown, relative crystallinity and peak intensity. The amylose content and protein content were significantly negatively correlated with the palatability. The amylose content was significantly positively correlated with the final viscosity and setback, and was significantly negatively correlated with the relative crystallinity, peak intensity, gelatinization enthalpy and breakdown. Palatability was significantly positively correlated with peak viscosity, breakdown and peak intensity, and was significantly negatively correlated with the final viscosity, setback, and retrogradation enthalpy and degree. Therefore, the selection of a low amylose content japonica rice cultivar grown without nitrogen fertilizer can reduce the amylose and protein contents, as well as improving the pasting properties, starch retrogradation properties and eating quality of the cooked rice.

scholarly journals Improving grain appearance of erect-panicle japonica rice cultivars by introgression of the null gs9 allele

2021 ◽  
Vol 20 (8) ◽  
pp. 2032-2042
Author(s):  
Dong-sheng ZHAO ◽  
Jin-yu LIU ◽  
Ai-qiu DING ◽  
Tao ZHANG ◽  
Xin-yu REN ◽  
...  
Keyword(s):  
Japonica Rice ◽  
Rice Cultivars

Characterization of Hungarian rice cultivars in nitrogen fixing associations with bacteria

2000 ◽  
Vol 28 (1-2) ◽  
pp. 9-16 ◽  
Author(s):  
Beatrix Rethati ◽  
Klara Dallmann ◽  
Ibolya K. Simon ◽  
Andor Balint ◽  
Bela Szajani ◽  
...  
Keyword(s):  
Rice Cultivars ◽  
Nitrogen Fixing

Red Rice (Oryza sativa) Biology. I. Characterization of Red Rice Ecotypes

1999 ◽  
Vol 13 (1) ◽  
pp. 12-18 ◽  
Author(s):  
José A. Noldin ◽  
James M. Chandler ◽  
Garry N. McCauley
Keyword(s):  
Flag Leaf ◽  
Natural Hybridization ◽  
Rice Cultivars ◽  
Red Rice ◽  
Cultivated Rice ◽  
Seed Shattering ◽  
Seed Moisture ◽  
Biology I ◽  
Plant Characteristics

Plant characteristics of red rice ecotypes obtained from Arkansas, Louisiana, Mississippi, and Texas, including 11 strawhulled, five blackhulled, two goldhulled, and one brownhulled type, were evaluated under field conditions. Most ecotypes were uniform and stable but manifested considerable genetic variability. Red rice plants had pubescent leaves, were taller with lighter green color, and produced more tillers and panicles per plant than rice cultivars ‘Lemont,’ ‘Mars,’ and ‘Maybelle.’ Most ecotypes were highly susceptible to seed shattering starting about 14 d after anthesis when seed moisture was more than 25%. Seeds of most ecotypes were highly dormant at harvest. Rice cultivars had a larger flag leaf and more total leaf area per plant at anthesis and produced more seeds per panicle than red rice. Some red rice ecotypes had plant characteristics closely related to cultivated rice suggesting natural hybridization with rice.

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