The breeding of japonica rice in northern China: An 11-year study (2006–2016)

Cui, Yue; Zhu, Meng-meng; Xu, Zhenbo; Chen, Wenfu

doi:10.1016/s2095-3119(19)62799-1

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…This meant that the higher the PC of a rice variety, the lower the HR or recovery rate. This correlation has also been recognized across many studies (Nguyen Ngoc De, 2008;Liu et al, 2015;Sreenivasulu et al, 2015;Zhou et al, 2015;Yue et al, 2020). The cause of this phenomenon can be explained by the disjointed arrangement of starch granules in the chalkiness area.…”

Section: Correlation Analysis Of Quality Characteristicssupporting

confidence: 64%

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Correlation among Quality Characteristics in Medium-Grain Rice

Tam,

Be Tu,

Pha

et al. 2023

vjas

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Rice (Oryza sativa L.) grain attributes, such as grain length and shape, milling quality, and physicochemical quality, are crucial for varietal development and subsequent farm adoption. Thus, it is crucial to comprehend the phenotypic range of these grain attributes and how they relate to one another. Therefore, this study analyzed the main grain quality traits in medium-grain rice, namely the amylose content (AC), gelatinization temperature (GT), gel consistency (GC), ratio of head rice (HR), and percentage of chalkiness (PC). Correlations among the major quality characteristics were then calculated through Pearson correlation matrix analysis. The results showed that AC was highly connected with GC, and PC and HR (GC) showed a strong correlation. The correlation between GT and GC was average. The other quality traits did not correlate significantly. The phenotypes of the grain quality traits provide a basis for improving the quality of medium-grain rice populations.

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Section: Correlation Analysis Of Quality Characteristicssupporting

confidence: 64%

“…PC and AC had a low correlation, with the correlation coefficient being +0.31. This low correlation was also confirmed in the studies of Nkori Kibanda & Luzi-Kihupi (2007), Zhu et al (2020), andYue et al (2020).…”

Section: Correlation Analysis Of Quality Characteristicssupporting

confidence: 63%

Correlation among Quality Characteristics in Medium-Grain Rice

Tam,

Be Tu,

Pha

et al. 2023

vjas

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“…Rice is a staple food for more than 65% of China’s population, making China both the largest producer and consumer of rice in the world ( Huang et al., 2021 ). However, rice acreage in China has stagnated since the beginning of the twenty-first century, and the yield has reached a plateau as well ( Cui et al., 2020 ). Before new high-yielding varieties are developed and adopted ( Cheng et al., 2007 ), optimizing fertilizer input and increasing fertilizer efficiency are long-term strategies to sustain rice production in China without compromising yield ( Peng et al., 2009 ; Chen et al., 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Simplified panicle fertilization is applicable to japonica cultivars, but splits are preferred in indica rice for a higher paddy yield under wheat straw return

Shu,

Zhang,

Wang

et al. 2024

Front. Plant Sci.

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IntroductionThe panicle fertilization strategy for japonica and indica rice under wheat straw return (SR) has not been updated, especially on the elaboration of their impacts on spikelet differentiation and degeneration. This study aimed to verify the hypothesis that SR increases spikelet number by reducing spikelet degeneration and to explore the possibility of simplifying panicle fertilization.MethodsIn three consecutive years, four varieties of japonica and indica rice were field-grown in Yangzhou, Jiangsu Province, China. Six panicle fertilization rates and split treatments were applied to SR and no straw return (NR) conditions.ResultsThe results showed that SR promoted rice yield significantly by 3.77%, and the highest yields were obtained under the T2 (split panicle fertilization at the panicle initiation (PI) and spikelet primordium differentiation (SPD) stages) and T1 (panicle fertilization only at the PI stage) treatments, for indica and japonica rice, respectively. Correlation and path analysis revealed that the number of spikelets per panicle was the most attributable to yield variation. SR significantly increased the concentration of alkali hydrolyzable N in the soil 40 days after rice transplantation, significantly increased the nitrogen accumulation per stem (NA) during the SPD-pollen mother cell meiosis (PMC) stage, and increased the brassinosteroids level in the young panicles at the PMC stage. SR also reduced the degeneration rate of spikelets (DRS) and increased the number of surviving spikelets (NSS). The dry matter accumulation per stem was more important to increasing the NA in japonica rice at the PMC stage, whereas NA was more affected by the N content than the dry matter accumulation in indica rice. In japonica rice, panicle N application once only at the PI stage combined with the N released from SR was enough to improve the plant N content, reduce the DRS, and increase the NSS. For indica rice, split application of N panicle fertilization at both the PI and SPD stages was still necessary to achieve a maximum NSS.DiscussionIn conclusion, under wheat SR practice, panicle fertilization could be simplified to once in japonica rice with a significant yield increase, whereas equal splits might still be optimal for indica rice.

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“…To date, there have been few systematic studies reporting the structure and properties of Japonica rice starch with amylose content higher than 20%. In recent years, considerable efforts have been paid to breeding techniques to modify the amylose content of Japonica rice (Cui et al, 2020). In this research, a Japonica rice starch with amylose content of 33.3% was compared with waxy and normal Japonica rice starches in terms of structural and functional properties.…”

Section: Introductionmentioning

confidence: 99%

Structural and functional characteristics of Japonica rice starches with different amylose contents

Luo

Cheng

Wei

et al. 2021

CyTA - Journal of Food

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Fully understanding the structures and properties of starches with different amylose contents is important to agriculture and food industries. Structural and functional characteristics of three Japonica rice starches differing in amylose content (<0.5%, 18.8%, and 33.3% for waxy, normal, and high-amylose varieties, respectively) were investigated using a range of characterization methods. As amylose content increased, the weight-average molecular weight, short-range order, relative crystallinity, and lamellar peak intensity of starch decreased. High-amylose starch contained a lower proportion of A chains than waxy and normal starches. High-amylose starch displayed a C-type crystalline structure, different from the A-type crystalline structure of waxy and normal starches. Compared with waxy and normal starches, high-amylose starch exhibited higher granule size (volume-average diameter), pasting temperature and higher resistant starch content, but lower peak viscosity, breakdown viscosity, swelling power, and rapidly digestible starch content. These results can provide reference for the exploitation of Japonica rice starches. Características estructurales y funcionales de los almidones de arroz Japonica con diferentes contenidos de amilosa RESUMENPara la agricultura y la industria alimentaria es importante comprender plenamente las estructuras y las propiedades de los almidones con diferentes contenidos de amilosa. Por ello, el presente estudio se propuso investigar las características estructurales y funcionales de tres almidones de arroz Japonica que difieren en su contenido de amilosa (<0.5%, 18.8% y 33.3% para las variedades cerosa, normal y con alto contenido de amilosa, respectivamente), utilizando varios métodos de caracterización. Así, pudo constatarse que, a medida que el contenido de amilosa aumenta, disminuyen el peso molecular medio, el orden de corto alcance, la cristalinidad relativa y la intensidad del pico laminar del almidón. Por otra parte, se comprobó que el almidón de alta amilosa contiene menor proporción de cadenas A que los almidones cerosos y normales, y que presenta una estructura cristalina de tipo C, diferente de la estructura cristalina de tipo A de los almidones cerosos y normales. En comparación con los almidones cerosos y normales, en el almidón de alta amilosa se constató un mayor tamaño de gránulo (diámetro medio del volumen), mayor temperatura de pegado y mayor contenido de almidón resistente, aunque posee menor viscosidad máxima, menor viscosidad de ruptura, menor poder de hinchamiento y menor contenido de almidón rápidamente digerible. En conclusión, estos resultados pueden servir de referencia para el aprovechamiento de los almidones de arroz Japonica.

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The breeding of japonica rice in northern China: An 11-year study (2006–2016)

Cited by 9 publications

References 18 publications

Correlation among Quality Characteristics in Medium-Grain Rice

Correlation among Quality Characteristics in Medium-Grain Rice

Simplified panicle fertilization is applicable to japonica cultivars, but splits are preferred in indica rice for a higher paddy yield under wheat straw return

Structural and functional characteristics of Japonica rice starches with different amylose contents

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