Influencing Factors of Grain Nutritional Quality and its Genetic Improvement Strategy in Rice

Peng, Bo; Qing-xi, Zhang; Tian, Xiaoli; Sun, Yan; Huang, Xinhua; Rui, Pang; Wang, Quanxiu; Zhou, Wei; Yuan, Hongyu; Yang, Fang; Peng, Juan; Song, Hui-Long Li Xiao-Hua; A, Xinxiang

doi:10.32861/jbr.71.1.11

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Nutritional quality is mostly affected by protein, starch, fatty and amino acid, vitamin, and mineral contents. The protein in rice is high in quality, and easily digested and absorbed in the gut ( Peng et al., 2021 ; Li et al., 2022b ; Gopika et al., 2022 ; Riaz et al., 2018 ). Grain protein is the second largest nutritional component after carbohydrates, and its content largely affects nutritional quality.…”

Section: Introductionmentioning

confidence: 99%

OsG6PGH1 affects various grain quality traits and participates in the salt stress response of rice

Peng,

Liu,

Qiu

et al. 2024

Front. Plant Sci.

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Cytoplasmic 6-phosphogluconate dehydrogenase (G6PGH) is a key enzyme in the pentose phosphate pathway that is involved in regulating various biological processes such as material metabolism, and growth and development in plants. However, it was unclear if OsG6PGH1 affected rice grain quality traits. We perform yeast one-hybrid experiments and reveal that OsG6PGH1 may interact with OsAAP6. Subsequently, yeast in vivo point-to-point experiments and local surface plasmon resonance experiments verified that OsG6PGH1 can bind to OsAAP6. OsG6PGH1 in rice is a constitutive expressed gene that may be localized in the cytoplasm. OsAAP6 and protein-synthesis metabolism-related genes are significantly upregulated in OsG6PGH1 overexpressing transgenic positive endosperm, corresponding to a significant increase in the number of protein bodies II, promoting accumulation of related storage proteins, a significant increase in grain protein content (GPC), and improved rice nutritional quality. OsG6PGH1 positively regulates amylose content, negatively regulates chalkiness rate and taste value, significantly affects grain quality traits such as appearance, cooking, and eating qualities of rice, and is involved in regulating the expression of salt stress related genes, thereby enhancing the salt-stress tolerance of rice. Therefore, OsG6PGH1 represents an important genetic resource to assist in the design of high-quality and multi-resistant rice varieties.

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Section: Introductionmentioning

confidence: 99%

OsG6PGH1 affects various grain quality traits and participates in the salt stress response of rice

Peng,

Liu,

Qiu

et al. 2024

Front. Plant Sci.

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“…Rice is the most important staple food in China, providing 28% of the protein and 20% of the calories for the 8.5 billion people in the country (Peng et al 2020). Northeast China is a key rice-growing area that contributes to approximately 17.7% of the annual national rice production (National Bureau of Statistics 2020), accounting for 60% of China's high-quality exported rice (Leng 2011).…”

Section: Introductionmentioning

confidence: 99%

Rice yield benefits from historical climate warming to be negated by extreme heat in Northeast China

et al. 2023

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Rice is currently benefiting from climate warming in Northeast China, but whether such positive effects will continue in the future remains unknown. Using county-level rice yield and climate data in Northeast China from 1980-2015, we examined the impacts of individual and combined climate variables on rice yields, estimated climateinduced yield changes, and quantified the associated contributions of these climate variables. The results suggest that climate change has caused a 10.1% yield increase in Northeast China since 1980. The main reasons are the reduced chilling damage (+5.4%) and warming below the optimum growth temperature (+4.6%). The influence of warming beyond the optimum growth temperature (i.e., high-temperature extremes) is quite limited (-0.054%) at present. However, with continuous warming, the harmful impact of such high-temperature extremes will outweigh other positive climate effects when the temperature increases by 3.36°C. Therefore, high-temperature extremes cannot be ignored despite their influence on rice yield being quite limited in Northeast China. Climate change mitigation and heat tolerance breeding are thus necessary for rice production in Northeast China.

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Breeding priorities for rice adaptation to climate change in Northeast China

et al. 2023

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Breeding is an important adaptation strategy to sustain rice production in China.However, the breeding priorities for ideal adaptation to future climate stress remain unknown. Here, we established 15 scenarios representing the use of varieties with high-median-low levels of chilling sensitivity, heat sensitivity, and maturity-type properties based on 140 existing rice varieties, and assessed the effectiveness of these scenarios for climate change adaptation in Northeast China. Results showed that the average yield of low-chilling-sensitivity varieties will decline by 10.8-47.5% in the 2100s, depending on shared socioeconomic pathways (SSPs). If the increase in warming is greater than 1.7°C, low-heat-sensitivity varieties show higher yields than low-chilling-sensitivity ones, but the average yield will decline by 10.4-33.5% in the 2100s than that under baseline climate. Comparably, the contribution of varieties with an extended whole growth duration was at least 5 times greater than that of lowsensitivity varieties, resulting in a 50% yield increase relative to that at the baseline climate. Our study suggests that late-maturing varieties have considerable breeding potential relative to the varieties with low sensitivity to cold and heat stresses, and late maturity is thus recommended as the primary breeding target for adaptation to climate change in Northeast China.

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Influencing Factors of Grain Nutritional Quality and its Genetic Improvement Strategy in Rice

Cited by 5 publications

References 4 publications

OsG6PGH1 affects various grain quality traits and participates in the salt stress response of rice

OsG6PGH1 affects various grain quality traits and participates in the salt stress response of rice

Rice yield benefits from historical climate warming to be negated by extreme heat in Northeast China

Breeding priorities for rice adaptation to climate change in Northeast China

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