Standard Rice Varieties with High Temperature Tolerance at the Ripening Stage in the Warm Region of Japan

Tamura, Katsunori; Kataoka, Takao; Nakanishi, Ai; Sato, Hiroyuki; Tamura, Yasuaki; Sakai, Makoto; Yamaguchi, Osamu; Wada, Takahiro; Tsubone, Masao; Tatara, Izumi; Tokuda, Shinji; Yoshida, Keiichiro; Koga, Junya; Nakayama, Miyuki; Fujii, Yasuhiro; Mitsukawa, Masahiro; Shimizu, Yasuhiro; Hasegawa, W.; Shiraishi, Makio; Nagayoshi, Yoshifumi; Matsuura, Satoshi; Wakamatsu, K.; Sato, Mitsunori; Sonoda, Junya; Takeuchi, Yoshinobu

doi:10.1626/jcs.87.209

Cited by 6 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They were selected as reference cultivars for each HTR based on their performance under high grain-filling temperatures (mean temperatures for 20 days after heading are typically around 27–28 °C). (Kaji et al, 2016; Tamura et al, 2018). The proposed models demonstrated that increasing HTR could reduce the occurrence of CG at high temperatures (>26 °C), and we found that a shift of HTR by one rank could decrease CG by more than 5%.…”

Section: Discussionmentioning

confidence: 99%

“…However, tolerance levels differed even among ‘heat-tolerant cultivars’. In 2018, MAFF established nine heat tolerance ranks (HTRs) to promote heat tolerance breeding and assigned several check cultivars to each HTR (MAFF, 1998; Kaji et al, 2016; Tamura et al, 2018). Rice breeders determine the HTRs of rice cultivars by comparing their proportions of CG in high-temperature settings (mean temperature for 20 days after heading of around 27 °C).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, assigned several check cultivars to each HTR as part of the Plant Variety Protection and Seed Act (No. 83 of 1998)(MAFF,1998; Kaji et al,2016; Tamura et al,2018). Rice breeders can now have a clear breeding target and determine the HTRs of new rice cultivars by comparing their proportions of CG in high-temperature settings (mean temperature for 20 days after heading of around 27 °C) with those of check cultivars.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effectiveness of heat tolerance rice cultivars in preserving grain appearance quality under high temperatures - A meta-analysis

Wakatsuki

Takimoto

Ishigooka

et al. 2023

Preprint

View full text Add to dashboard Cite

Background: Climate change, particularly rising temperatures, negatively affects rice grain quality, increasing chalky grain percentage (CG) and hampering rice grade and price. Heat-tolerant cultivars have been bred and released since the 2000s, but the effectiveness of heat tolerance in reducing the occurrence of CG has yet to be quantified. Objectives: This study aimed to measure the effectiveness of breeding for better heat tolerance in reducing the negative impact of high temperatures on rice quality. Methods: Through a systematic literature search, we developed a dataset including 1297 field observations covering 48 cultivars from five different heat-tolerant ranks (HTRs) at 44 sites across Japan. A linear mixed-effect model (LME) and a random forest model (RF) were fitted to the data to analyze the effect of HTR and climatic factors such as the cumulative mean air temperature above 26°C (TaHD), mean solar radiation and mean relative humidity for 20 days after heading on CG. Results: The LME model explained 63 % of the variation with a 14% RMSE. The RF partial dependence plot revealed that the logit-transformed CG response to climate factors was linear, supporting the assumption of LME. The statistical analysis showed that CG increased as a function of TaHD (P < 0.001), with significant differences among HTRs (P < 0.001). The strongest effect of TaHD was obtained for the lowest HTR and was found to decrease with increasing HTR. CG also increased with higher relative humidity (P < 0.001) and solar radiation (P < 0.01). Based on our modeling, we estimated that as TaHD increased from 20 to 80 degrees Cd (equivalent to a mean temperature increase from 27 degrees C to 30 degrees C), CG increased by 66 points for cultivars with the lowest HTR, 45 points for cultivars with an intermediate HTR, and 19 points for cultivars with the highest HTR. Raising HTR by just one step (from intermediate to moderately tolerant) is projected to increase the proportion of first-grade rice at a grain-filling temperature of 27 degrees C, but tolerance levels need to be improved further in case of stronger warming. Conclusions: The effect of high temperatures on CG was highly dependent on the cultivar's HTR. Improvements in HTR effectively reduce the negative impacts of high temperatures on rice grain quality. Significance: Heat-tolerant cultivars are projected to suppress the prevalence of CG more than threefold compared with heat-sensitive cultivars when grain-filling temperature increases from 27 to 30 degrees C.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effectiveness of heat tolerance rice cultivars in preserving grain appearance quality under high temperatures - A meta-analysis

Wakatsuki

Takimoto

Ishigooka

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Chalky grains caused by high temperature stress decrease commercial value of rice, resulting in an economic loss of rice producers (Morita et al 2016). There is a wide variation in occurrence of chalky grains under high temperature stress during the ripening period among cultivars (Kaji et al 2016, Kobayashi 2012, Tamura et al 2018. Highly palatable cultivars that are resilient to high-temperature stress are needed because the heat resilience of "Koshihikari" is not sufficient (Kaji et al 2016, Kobayashi 2012.…”

Section: Introductionmentioning

confidence: 99%

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

Ishimaru

Nagaoka

KIM

2023

JARQ

View full text Add to dashboard Cite

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

show abstract

A dataset for analyzing the climate change response of grain quality of 48 Japanese rice cultivars with contrasting levels of heat tolerance

Wakatsuki,

Takimoto,

Ishigooka

et al. 2024

Data in Brief

View full text Add to dashboard Cite

Standard Rice Varieties with High Temperature Tolerance at the Ripening Stage in the Warm Region of Japan

Abstract: Fourteen standard rice varieties with high temperature tolerance at the ripening stage in Kyushu region were selected based on apparent by an evaluation of grain quality after ripening under high temperature condition at eight breeding stations,

Cited by 6 publications

References 3 publications

Effectiveness of heat tolerance rice cultivars in preserving grain appearance quality under high temperatures - A meta-analysis

Effectiveness of heat tolerance rice cultivars in preserving grain appearance quality under high temperatures - A meta-analysis

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

A dataset for analyzing the climate change response of grain quality of 48 Japanese rice cultivars with contrasting levels of heat tolerance

Contact Info

Product

Resources

About