Quantitative assessment on the grain appearance of a new Japanese rice cultivar ‘Niji-no-kirameki’ with a novel heat-avoidance mechanism during ripening

Ishimaru, Tsutomu; Okamura, Masaki; Nagaoka, Ichiro; Yamaguchi, Hiromichi; Yoshimoto, Mayumi; Ohdaira, Youichi

doi:10.1016/j.stress.2022.100074

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…It has been investigated relationship between environmental factors and traits and some studies highlight the importance of environmental conditions in determining yield and quality. Genotypic and phenotypic correlation are noted (Tiwari et al) [51], as well as the impact of high temperatures on grain appearance (Ishimaru et al) [42] and the effect of water consumption and rainfall on yield (Semeskandi et al) [48]. Therefore, adding various environmental factors, such as precipitation, to the new analysis items may provide a deeper understanding of regional factors influencing traits.…”

Section: Discussionmentioning

confidence: 99%

“…Data from productivity tests has been used for understanding the relationships between traits, qualities, cropping regions, and environmental factors [40][41][42][43][44][45][46][47][48][49][50][51][52]. For instance, certain rice varieties show superior grain appearance under high-temperature conditions [42] (Ishimaru et al). AI-Daej (2022) [40] reported correlations among quality and mineral element contents.…”

Section: Discussionmentioning

confidence: 99%

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A semidwarf and late-flowering isogenic Kosihihikari d60Hd16: development, productivity, and regional suitability revealed by correlation-based network analysis

Tomita,

Honda

2024

Preprint

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Breeding rice varieties that are tolerant to weather variability and optimizing cultivation methods for each developed variety are challenging issues for global food problems. In this study, the late-flowering geneHd16of Koganebare was introduced into Koshihikari through backcrossing to create ’Koshihikari Hd16’. It was then crossed with ’Koshihikari d60’ to develop an isogenic Koshihikari containing bothHd16andd60. Productivity tests were conducted in nine prefectures in Japan for two homogeneous rice genotypes,Hd16(late flowering) andd60Hd16(short culm and late flowering). By analyzing the relationship between genotype, traits, and accumulation temperature, we reexamined the characteristics of each genotype and inferred the optimal growing areas. Correlation-based network analysis among yield, grain quality, and value of taste and traits showed that quality was positively correlated with panicle length and 1000-grain weight, and yield was strongly positively correlated with 1000-grain weight. d60 genotype was negatively correlated with culm length and lodging degree. These correlations were supported by partial correlation analysis and significant differences compared to the wildtype was identified. Principal component analysis ofd60Hd16revealed that Yamanashi and Ehime, which have longer panicle length and culm length, were suitable in terms of yield and quality, while Shimane, which is warmer and has shorter panicle length and culm length, was suitable in terms of eating quality. Moreover, Koshihikari d60Hd16 could express traits that are less prone to lodging degree while maintaining the same quality and yield as the wild type in cultivation of late-flowering strains. Thus, thed60andH16genotypes express stable traits adapted to a wide range of Japanese climatic conditions and growing environments. This study provides fundamental information for promoting new smart agriculture, in which improved varieties are deployed in different regions with different climatic conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A semidwarf and late-flowering isogenic Kosihihikari d60Hd16: development, productivity, and regional suitability revealed by correlation-based network analysis

Tomita,

Honda

2024

Preprint

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“…Superior eating quality of "Tsukiakari" and heat-avoidance mechanism in "Niji-no-kirameki" will give impacts on further development of new rice genotypes that highly meet the future demands of rice consumers, rice processing companies, and paddy farmers. in panicle temperature between "Niji-no-kirameki" and "Koshihikari" (subtraction of "Niji-no-kiraeki"-"Koshihikari") was not observed when the air temperature at 11:00-12:00 was up to 27℃, whereas it became negative when the air temperature was higher than 27℃ (Ishimaru et al 2022b), a study by Ishimaru et al (2022b) found a novel biological response of "Niji-no-kirameki" that prevents an increase in panicle temperature when rising temperatures occur during the ripening period. The difference in panicle temperature between "Niji-nokirameki" and "Koshihikari" was estimated to reach up to 1.6℃ on the day of extremely high temperatures due to a foehn wind on 15 August 2019.…”

Section: Future Prospectsmentioning

confidence: 95%

Development, Characterization, and Distribution of New, High-yielding, and Highly Palatable Japanese Rice Cultivars “Tsukiakari” and “Niji-no-kirameki”

Ishimaru

Nagaoka

KIM

2023

JARQ

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New High-yielding and Highly Palatable Japanese Rice Cultivars boxes and rice balls sold in supermarkets and convenience stores) and dining out has increased. In change reflecting the tendency of Japan's population to prefer time-saving cooking styles due to changes in social structure, i.e., increases in single-person and double-income households, the proportion of rice used for commercial purposes was 15.2% in 1985, reached 30.8% in 2020, and is projected to exceed 40% in 2035 (Ministry of Agriculture, Forestry and Fisheries, Japan 2021; Rice Stable Supply Support Organization 2015).There is a high demand for developing high-yielding varieties that are highly compatible with large-volume rice cooking. High yields are linked with cost-saving, and high compatibility will increase cooking efficiency. Rice

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“…In practical breeding, the use of MAS for rice blast resistance breeding based on the finding of blast high field resistance governed by major gene(s) is rapidly progressing in Japan [53][54][55][56]. However, to ensure specificity to the blast fungus race/strain/isolate and the stability and persistence of resistance expression, it is necessary to distinguish between conventional field resistance and high field resistance expressed by a major gene.…”

Section: Field Resistance and Its Use In Breeding For Rice Blast Resi...mentioning

confidence: 99%

Investigating the Mechanisms Underlying the Durability and Sustainable Use of Pb1 Gene-Mediated High Field Resistance to Rice Panicle Blast

Fujii,

Suzuki,

Nakamura

et al. 2023

Agronomy

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Rice blast, caused by Magnaporthe oryzae, poses a significant threat to rice production. Rice blast susceptibility has been observed in Japanese rice varieties with excellent eating quality. Enhancing blast resistance is essential to ensure minimal use of agricultural chemicals. Two types of blast resistance are observed: True resistance, which is a type of qualitative resistance expressed by a major gene, and field resistance, which is a type of quantitative resistance expressed by multiple micro-acting genes. ‘Resistance collapse’, in which a variety with a true resistance gene becomes diseased by blast fungus races compatible with the resistance gene, has been observed. Varieties carrying blast-resistance genes, such as Pb1 (panicle blast resistance 1), have been developed through DNA marker-assisted selection. In this review, we focus on the Pb1, which expresses strong quantitative resistance to panicle blast and has been widely used in Japan without showing ‘resistance collapse’ for 40 years. Pb1 is an ‘adult plant resistance gene’ that does not exert strong selection pressure on the blast population during the leaf blast stage, thus preventing the selective multiplication of Pb1-compatible blast strains. This epidemiological mechanism prevents ‘resistance collapse’. Interdisciplinary research and breeding are required to sustainably use genes that induce high field resistance.

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Quantitative assessment on the grain appearance of a new Japanese rice cultivar ‘Niji-no-kirameki’ with a novel heat-avoidance mechanism during ripening

Cited by 5 publications

References 27 publications

A semidwarf and late-flowering isogenic Kosihihikari d60Hd16: development, productivity, and regional suitability revealed by correlation-based network analysis

A semidwarf and late-flowering isogenic Kosihihikari d60Hd16: development, productivity, and regional suitability revealed by correlation-based network analysis

Development, Characterization, and Distribution of New, High-yielding, and Highly Palatable Japanese Rice Cultivars “Tsukiakari” and “Niji-no-kirameki”

Investigating the Mechanisms Underlying the Durability and Sustainable Use of Pb1 Gene-Mediated High Field Resistance to Rice Panicle Blast

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