Differences in Viscosity of Superior and Inferior Spikelets of Japonica Rice with Various Percentages of Apparent Amylose Content

Ma, Zhao-hui; Cheng, Huang; Nitta, Youji; Aoki, Naohiro; Chen, Yun; Chen, Heng-xue; Ohsugi, Ryu; Lyu, Wen-yan

doi:10.1021/acs.jafc.7b00048

Cited by 25 publications

(25 citation statements)

References 28 publications

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“…Peak viscosity provides a measure of the extent to which starch granules swell in the presence of water, heat, and shear. Breakdown viscosity measures the resistance of starch to fragmentation during cooking and gives an indication of the ease of cooking as well as palatability (Ma et al, ). Setback viscosity, on the other hand, measures the ability of heated starch to recover its viscosity upon cooling and provides an indication of the texture of cooked rice.…”

Section: Introductionmentioning

confidence: 99%

Impact of alternative irrigation practices on rice quality

et al. 2019

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Background and objectives:Current global concerns about water scarcity present a need to investigate more water-efficient rice production methods. Alternate wetting and drying (AWD) is fast emerging as a water-saving irrigation practice, but its effects on rice quality are largely unknown. To ascertain the impact of water-saving irrigation practices on rice quality, three irrigation treatments, namely continuous flooding with cascade delivery (four fields); continuous flooding with multiple-inlet delivery (four fields); and AWD with multiple-inlet delivery (four fields), were established on 12 production-sized (16.2 ha) fields in 2017. Findings: Results of rice quality evaluations showed that irrigation treatment had a significant (p < 0.05) effect on chalkiness. Samples harvested from the AWD fields had slightly greater mean chalkiness (5.6%) than samples harvested from the two continuously flooded fields (5.1-5.2%). Milling yields were not affected (p > 0.05) by irrigation treatments. The average milled rice and head rice yields across irrigation treatments were 73% and 59%, respectively. Regarding pasting properties, while peak and breakdown viscosities were not affected (p > 0.05) by the irrigation treatments, setback viscosity (SB), which is often linked with cooked rice texture, was impacted. Among the irrigation treatments, mean SB was least for the AWD treatment (146 cP), while the mean SB for the continuously flooded fields was similar at 168-169 cP. Conclusions: In summary, the use of AWD with multiple-inlet delivery did not impact milling yields of rice relative to the conventional practices of continuous flooding. However, rice harvested from the AWD treatment fields had slightly greater chalkiness and lesser SB. Significance and novelty: This study addresses a gap in literature concerning the impact of emerging water-saving irrigation techniques, especially AWD as it involves subjecting rice to a certain level of water stress, on rice grain quality characteristics. K E Y W O R D Salternate wetting and drying, chalkiness, milling yields, pasting properties, physicochemical properties 816 | GRAHAM-ACQUAAH et Al.

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Section: Introductionmentioning

confidence: 99%

Impact of alternative irrigation practices on rice quality

et al. 2019

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“…AKI‐ dep1 exhibited significantly lower breakdown, higher final viscosity and setback values than those of AKI‐ DEP1 (Table ). Previous studies demonstrated that rice with high palatability has a higher breakdown and a lower final viscosity and setback than low‐palatable varieties (Ma et al, ). Thus, we inferred that AKI‐ dep1 showed lower palatability than that of AKI‐ DEP1 .…”

Section: Resultsmentioning

confidence: 98%

Effects of DEP1 on grain yield and grain quality in the background of two japonica rice (Oryza sativa) cultivars

et al. 2019

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Plant architecture is an accessible approach to achieving high‐yield potential. The DENSE AND ERECT PANICLE 1 (DEP1) gene regulating panicle morphology, grain number per panicle, and nitrogen uptake and metabolism has been widely used for the breeding of high‐yield rice in northern Chinese japonica varieties. However, there has been no consensus on the genetic effects of dep1 on grain yield and quality under different genetic backgrounds and growing environments. In the present study, we developed two sets of near‐isogenic lines (NILs) of DEP1 (AKI‐dep1, AKI‐DEP1, LG5‐dep1 and LG5‐DEP1), each carrying the DEP1 region from either 'Liaogeng5' (LG5) or 'Akitakomachi' (AKI) in the AKI and LG5 backgrounds. Our results demonstrated that AKI‐dep1/LG5‐dep1 exhibited erect panicle and enhanced grain number per panicle, thereby consequently increasing grain yield, whereas they possessed inferior grain appearance compared with AKI‐DEP1/LG5‐DEP1 in the same background. However, the effects of dep1 on grain processing quality and eating and cooking quality varied with the background. These results provide useful information for high‐yield erect panicle rice breeding by marker‐assisted selection.

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“…Elastic index and the overall quality of balance of rice decreased and increased, respectively. Ma et al (2017) also found that the accumulated density of starch in inferior grain was much lower compared with the superior grain. As the elasticity of the surface layer was smaller, and the stickiness and quality of balance were higher, the overall palatability of the superior grains improved greatly.…”

Section: Differences In Intergranular Texture Characteristics and Tmentioning

confidence: 85%

“…Xu, Li, Qian, Wang, and Yang (2016) compared the accumulation of starch granules between superior and inferior grains in japonica rice, wheat, and maize, and reported that the distribution ratio of large starch granules in inferior grain was higher than that in superior grain, which lead a large gap between the starch granules. Ma et al (2017) also found that the accumulated density of starch in inferior grain was much lower compared with the superior grain. Therefore, it can be concluded that, as the degree of grain filling is high, the starch granules are arranged closely, making conditions favorable for heat conduction, and thereby, the degree of gelatinization of the starch.…”

Section: Differences In Intergranular Texture Characteristics and Tmentioning

confidence: 85%

Comparison of the chemical and textural properties of germ‐remaining soft rice grains from different spikelet positions

Chen

Lyu

et al. 2019

Cereal Chem

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Background and objectives Rice with very low amylose content tends to have a good taste, while germ‐remaining rice is nutritive because it retains nutrient‐rich embryos. We cultivated a batch of new germ‐remaining rice varieties with very low amylose content, and good nutrition and taste. We tested the differences in taste quality between superior and inferior grains. Findings The plumule ratio of superior grain was significantly higher than that of inferior grain. The elasticity of the surface layer and whole layer of superior grains was greatly reduced, whereas quality of balance (stickiness/hardness) and tackiness were increased. The proportion of apparent amylose content (AAC) and amylopectin long‐chain branching (Fb3) decreased, whereas the proportion of medium‐length branches (Fb1+2) increased significantly. Correlation analysis showed that small value of aspect ratio and low proportion Fb3, especially the former, can improve the quality of balance of rice. Moreover, plumule ratio showed a high correlation with grain shape and filling degree. Conclusions Therefore, for the specially developed rice, plumule ratio and edibility can be improved by promoting grain plumpness and weight ratio of the embryo, especially the inferior grain. Significance and novelty For rice taste improving, the contribution of grain filling was greater than that of chemical changes in the endosperm composition, and breeders should pay attention to grain shape improvement and filling to improve the taste of rice.

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Differences in Viscosity of Superior and Inferior Spikelets of Japonica Rice with Various Percentages of Apparent Amylose Content

Cited by 25 publications

References 28 publications

Impact of alternative irrigation practices on rice quality

Impact of alternative irrigation practices on rice quality

Effects of DEP1 on grain yield and grain quality in the background of two japonica rice (Oryza sativa) cultivars

Comparison of the chemical and textural properties of germ‐remaining soft rice grains from different spikelet positions

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