Introgression of QTLs Controlling Spikelet Fertility Maintains Membrane Integrity and Grain Yield in Improved White Ponni Derived Progenies Exposed to Heat Stress

Vivitha, P.; Raveendran, M.; Vijayalakshmi, D.

doi:10.1016/j.rsci.2016.05.006

Cited by 28 publications

(7 citation statements)

References 23 publications

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“…A less percent reduction of grain yield was observed in N22 (6.09%). Similarly to the results of Vivitha et al (2017), who reported a less percent reduction of yield in N22 up to 6.94% under heat stress condition. The yields of two varieties had a direct correlation with 1000 grain weight.…”

Section: Yield Responsessupporting

confidence: 83%

Rice Yield under High-Temperature Stress is Influenced by Morpho –Physiological Traits

Vinitha¹,

Raveendran²,

Prasad³

et al. 2020

Madras Agricultural Journal

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High-temperature stress adversely affects crop production, particularly reducing the rice yield. It is essential to study the effect of heat stress on morphological, physiological, and yield responses to develop mitigation strategies. Hence the present work was carried out by raising Nagina (N22) and Coimbatore 51 (CO51) rice varieties in controlled conditions. Increased plant height and tiller number were observed in case of high-temperature conditions, coupled with reduced leaf area and chlorophyll index observed in both the varieties. Exposure of plants to high temperatures also resulted in a reduction of panicle length, panicle weight, and thousand-grain weight, which ultimately resulted in lower grain yield. Percent reduction in physiological traits such as leaf area and chlorophyll index was less in N22 compared to CO51. N22 had the highest panicle length, panicle weight, and thousandgrain weight under heat stress, thus maintaining the yield under stress.

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Section: Yield Responsessupporting

confidence: 83%

Rice Yield under High-Temperature Stress is Influenced by Morpho –Physiological Traits

Vinitha¹,

Raveendran²,

Prasad³

et al. 2020

Madras Agricultural Journal

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“…For HDT, diverse germplasm and populations with heat‐tolerant parents have been evaluated to identify tolerant resources and their underlying genetic architecture (Redoña et al, 2009; Jagadish et al, 2010; Ye et al, 2012; Ye, Tenorio, Argayoso, et al, 2015; Ye, Tenorio, Redoña, et al, 2015; Hirabayashi et al, 2015; reviewed by Xu, Henry, & Sreenivasulu, 2020). Among them, N22 and Giza178 contributed qHTSF4.1 which confers high spikelet fertility under HDT and has been introgressed into the mega variety IR64 (Ye, Tenorio, Redoña, et al, 2015) and Indian variety White Ponni (Vivitha, Raveendran, & Vijayalakshmi, 2017). In this study, some of the advanced qHTSF4.1 ‐IR64 introgression lines (entry V4 and V8) outperformed the checks (IR64 and N22) under both ambient and HNT conditions.…”

Section: Discussionmentioning

confidence: 99%

What happens at night? Physiological mechanisms related to maintaining grain yield under high night temperature in rice

Misra

Sreenivasulu

et al. 2021

Plant Cell & Environment

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High night temperature (HNT) causes substantial yield loss in rice (Oryza sativa L.). In this study, the physiological processes related to flag leaf dark respiration (Rn) and grain filling under HNT were explored in a multi‐parent advanced generation intercross population developed for heat tolerance (MAGICheat) along with selected high temperature tolerant breeding lines developed with heat‐tolerant parents. Within a subset of lines, flag leaf Rn under HNT treatment was related to lower spikelet number per panicle and thus reduced yield. HNT enhanced the nighttime reduction of non‐structural carbohydrates (NSC) in stem tissue, but not in leaves, and stem nighttime NSC reduction was negatively correlated with yield. Between heading and harvest, the major difference in NSC concentration was found for starch, but not for soluble sugar. HNT weakened the relationship between NSC remobilization and harvest index at both the phenotypic and genetic level. By using genome‐wide association studies, an invertase inhibitor, MADS box transcription factors and a UDP‐glycosyltransferase that were identified as candidate genes orchestrating stem NSC remobilization in the control treatment were lost under HNT. With the identification of physiological and genetic components related to rice HNT response, this study offers promising prebreeding materials and trait targets to sustain yield stability under climate change.

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“…The study conducted by (Ye et al 2012) proved that N22 as a heat-tolerant cultivar. (Vivitha et al, 2017), reported a less percent reduction of yield in N22 upto 6.94% under heat stress Figure 3. Effect of high-temperature stress on total chlorophyll content of rice genotypes conditions.…”

Section: Grain Weightmentioning

confidence: 93%

Impact of High Temperature Stress on Morpho Physiological Traits and Yield of Rice (Oryza sativa L.) Genotypes

Maheswari¹,

Chandrasekhar²,

Jeyakumar³

et al. 2021

MAJ

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High temperature stress is a major environmental factor that affects crop growth, development and yield, it especially limits rice yield. Hence, an experiment was conducted to study the impact of high temperature on morpho-physiological parameters and yield of rice genotypes. Ten rice genotypes were used in this study viz., N22, ADT 36, ADT 37, ADT 43, ADT 45, CO 51, ASD 16, MDU 6, TPS 5 and Anna (R) 4. The study was carried out at OTC (Open Top Chamber) with the treatments of ambient, ambient +2O C and ambient +4O C. Stress was imposed from anthesis to early grain filling period. Observations on plant height, the number of tillers, leaf area, SPAD (Chlorophyll index) and chlorophyll stability index (CSI) were done after the stress imposement and grain yield was calculated after harvest. Results revealed that, the significant changes were observed in morpho-physiological traits and grain yield of rice genotypes among the treatments and with the genotypes. N22 (10% and 19%) and Anna (R) 4 (12% and 22%) recorded less reduction of grain yield in ambient +2O C and ambient +4O C compared with ambient, due to less reduction of total chlorophyll content, SPAD values, leaf area and increased plant height. These parameters resulted in higher biomass which indirectly contributed to higher grain yield in N22 and Anna (R) 4 under high temperature

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Introgression of QTLs Controlling Spikelet Fertility Maintains Membrane Integrity and Grain Yield in Improved White Ponni Derived Progenies Exposed to Heat Stress

Cited by 28 publications

References 23 publications

Rice Yield under High-Temperature Stress is Influenced by Morpho –Physiological Traits

Rice Yield under High-Temperature Stress is Influenced by Morpho –Physiological Traits

What happens at night? Physiological mechanisms related to maintaining grain yield under high night temperature in rice

Impact of High Temperature Stress on Morpho Physiological Traits and Yield of Rice (Oryza sativa L.) Genotypes

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