Genetic mechanism of heat stress tolerance at anthesis among three different rice varieties with different fertilities under heat stress

Takai, Toshiyuki; Lumanglas, Patrick D.; Simon, Eliza Vie

doi:10.1080/1343943x.2020.1766363

Cited by 8 publications

(5 citation statements)

References 41 publications

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“…Identification of QTLs is useful for stress tolerance in the early and vegetative growth phases of rice, as well as candidate genes using the genotyping-by-sequencing (GBS) approach to compose SNP markers that will be used for genotype selection and map preparation [137]. It recognizes the genetic mechanism of tolerance to heat stress during rice anthesis in relation to pollen fertility [116] and the genes that were expressed under heat conditions [149]. Several QTLs related to the nature and response of rice to heat stress, including the qHTSF associated with spikelet sterility, have been confirmed to be located on chromosomes 1, 4, 6, and 11 from the cultivars IR64/N22, Giza 178, and MY23, while QTL qHTH was identified on chromosome 5 of O. rufipogon [68,115,116].…”

Section: Introgression Methods and Gene Pyramiding In Developing Clim...mentioning

confidence: 99%

“…It recognizes the genetic mechanism of tolerance to heat stress during rice anthesis in relation to pollen fertility [116] and the genes that were expressed under heat conditions [149]. Several QTLs related to the nature and response of rice to heat stress, including the qHTSF associated with spikelet sterility, have been confirmed to be located on chromosomes 1, 4, 6, and 11 from the cultivars IR64/N22, Giza 178, and MY23, while QTL qHTH was identified on chromosome 5 of O. rufipogon [68,115,116].…”

Section: Introgression Methods and Gene Pyramiding In Developing Clim...mentioning

confidence: 99%

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Toward Food Security in 2050: Gene Pyramiding for Climate-Smart Rice

Isnaini,

Nugraha,

Baisakh

et al. 2023

Sustainability

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The decline in crop productivity due to climate change is a major issue that threatens global food security and is the main challenge for breeders today in developing sustainable varieties with a wider tolerance to abiotic and biotic stresses. Breeding climate-smart rice (CSR) cultivars may be the best adaptation to climate change, with the potential to improve future food security and profitability for farmers in many nations. The main objective of this review is to highlight the direction of development of superior rice breeding from time to time, and various studies of new techniques of breeding methods for pyramiding various superior rice characteristics, especially characteristics related to abiotic stress, and to make a climate-suitable genotype that is resilient to climate change. For the design and strategy of the information search, a methodology was followed to compile and summarize the latest existing studies on rice breeding for abiotic stresses. The findings revealed that there is still an empty research gap in the context of supplying CSR products, which should be a priority for rice researchers in order to increase dissemination and ensure food security for future generations, particularly in climatically vulnerable agro-ecologies. And we conclude that, while technological innovation, specifically the integration of DNA markers and the genomic approach into conventional breeding programs, has made major contributions to the development of CSR, there is an urgent need to build strategic plans for the development of varieties with various stress tolerances.

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Section: Introgression Methods and Gene Pyramiding In Developing Clim...mentioning

confidence: 99%

Section: Introgression Methods and Gene Pyramiding In Developing Clim...mentioning

confidence: 99%

Toward Food Security in 2050: Gene Pyramiding for Climate-Smart Rice

Isnaini,

Nugraha,

Baisakh

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…The greater value of the mean compared to Uma indicates that this important trait for heat tolerance has been beneficially transferred from the parent NL-44 to most of the population. Takai et al (2020), while studying QTLs associated with spikelet fertility noted that the expression of QTLs may be dependent on their genetic background. Therefore, the varieties selected and the alleles present in them must be carefully considered while undertaking breeding programs.…”

Section: Influence Of High Temperature On Yieldmentioning

confidence: 99%

Identification of simple sequence repeat markers linked to heat tolerance in rice using bulked segregant analysis in F2 population of NERICA-L 44 × Uma

et al. 2023

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The damage caused by high temperature is one of the most important abiotic stress affecting rice production. Reproductive stage of rice is highly susceptible to high temperature. The present investigation was undertaken to identify polymorphic microsatellite markers (SSR) associated with heat tolerance. The rice cultivars NERICA– L 44 (heat tolerant) and Uma (heat susceptible) were crossed to generate F1 and F2 populations. The F2 population was subjected to heat stress at >38°C and the 144 F2 plants were evaluated for their tolerance. The results note that the mean of the F2 population was influenced by the tolerant parent with regards to the traits of plant height, membrane stability index, photosynthetic rate, stomatal conductance, evapotranspiration rate, pollen viability, spikelet fertility and 1000 grain weight. Ten each of the extremely susceptible and tolerant plants were selected based on the spikelet fertility percentage. Their DNA was pooled into tolerant and susceptible bulks and Bulked Segregant Analysis (BSA) was carried out using 100 SSR markers to check for polymorphism. The survey revealed a polymorphism of 18% between the parents. RM337, RM10793, RM242, RM5749, RM6100, RM490, RM470, RM473, RM222 and RM556 are some of the prominent markers that were found to be polymorphic between the parents and the bulks. We performed gene annotation and enrichment analysis of identified polymorphic markers. Result revealed that the sequence specific site of that chromosome mostly enriched with biological processes like metabolic pathway, molecular mechanism, and subcellular function. Among that RM337 was newly reported marker for heat tolerance. Expression analysis of two genes corresponds to RM337 revealed that LOP1 (LOC_Os08g01330) was linked to high temperature tolerance in rice. The results demonstrate that BSA using SSR markers is useful in identifying genomic regions that contribute to thermotolerance.

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“…The high-yielding Indica rice variety "Takanari" was used as the white rice for comparison with black rice. Takanari white rice is also a medium-tall variety with a growth duration of around 120-130 days and tolerance to heat stress (Takai et al, 2019).…”

Section: Experimental Design and Treatmentsmentioning

confidence: 99%

Optimizing phosphorus management to increase grain yield and nutritional quality while reducing phytic acid concentration in black rice (Oryza sativa L.)

Asai

Kawamura

et al. 2023

Front. Sustain. Food Syst.

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Rice with a black-colored pericarp (hereafter, black rice) has attracted considerable attention because of its high nutritional value. It is traditionally grown in infertile agroecosystems, where soil nutrient deficiency would affect grain yield and nutritional quality of the rice. This study examined the effects of phosphorus (P) application (0, 100, 250, 500, 1,000, and 1,300 mg P2O5 pot−1) on the growth, grain yield, and certain quality parameters of unpolished black (“Asamurasaki”) and white (“Takanari”) rice. The results showed that black rice grew poorly under P limitation, resulting in fewer tillers and a lower grain yield, while maintaining higher photosynthetic efficiency than white rice. However, black rice produced under P stress exhibited higher levels of Zn, Fe, and antioxidant (total phenolic and flavonoid content) than white rice, making it more nutritious. The optimal P application rates for black and white rice were 250 and 500 mg P2O5 pot−1, respectively, to achieve high yields. At the optimal rate, black rice exhibited high Fe, Zn and antioxidant levels compared to that at higher P application rates and had lower phytic acid levels, which could alleviate its inhibition of mineral absorption in the digestive tract. Moreover, low grain P due to P stress decreased the lightness L* value in the CIE-Lab system, improving the visual grain quality. Therefore, optimal P management is crucial for maintaining optimal grain yield with low phytic acid concentration and enhancing the nutritional quality of black rice for human consumption.

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Genetic mechanism of heat stress tolerance at anthesis among three different rice varieties with different fertilities under heat stress

Cited by 8 publications

References 41 publications

Toward Food Security in 2050: Gene Pyramiding for Climate-Smart Rice

Toward Food Security in 2050: Gene Pyramiding for Climate-Smart Rice

Identification of simple sequence repeat markers linked to heat tolerance in rice using bulked segregant analysis in F2 population of NERICA-L 44 × Uma

Optimizing phosphorus management to increase grain yield and nutritional quality while reducing phytic acid concentration in black rice (Oryza sativa L.)

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