Impact of high temperature stress during reproductive and grain filling stage in rice

Beena, R.; Vighneswaran, Veena; Sindhumole, P.; Narayankutty, M. C.; Voleti, S. R.

doi:10.5958/2249-5266.2018.00015.2

Cited by 15 publications

(11 citation statements)

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“…Design of the experiment was CRD with three replications. The variety used for this study was Uma (MO-16) is a high yielding variety (average yield-6t/ha) susceptible to high temperature stress (Beena et al, 2018a). Seedlings were raised in pot trays and transplanted to mud pots on 18 th days after sowing.…”

Section: Methodsmentioning

confidence: 99%

“…In these environmental conditions, day temperature periodically exceeded critical temperature of about 33  C for seed set which resulted in reduction in the fertility of spikelets and lead to reduced in yield (Nakagawa et al, 2003). Impact of high temperature on physiological and yield traits were studied in rice (Beena et al, 2018a;Beena et al, 2018b). Pravallika et al, 2020 evaluated the nutritional and seed filling traits in heat tolerant and susceptible rice genotypes.…”

Section: Introductionmentioning

confidence: 99%

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Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Beena

2021

IJARe

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Background: High temperature is an important abiotic stress affecting the productivity of rice. Early morning flowering trait is an escape mechanism from heat. This trait is present in wild rice cultivars. Here we tried to induce early morning flowering trait by the application of methyl jasmonate.Methods: A pot culture experiment was conducted during Rabi, 2017 and 2018 to study the effect of foliar application of methyl jasmonate on high temperature stress (more than 35°C) mitigation in rice was conducted in the Department of Plant Physiology, College of Agriculture, Vellayani during 2017-2019. The variety used was Uma (MO 16). Methyl jasmonate was applied as foliar spray to the spikelet in varying concentration with different time. Physiological observations were taken at 50% flowering stage and yield parameters were taken at harvest stage. Conclusion: There was significant variation for physiological and yield components among treatments. 4mM L-1 methyl jasmonate at 7am treatment exhibited increase in pollen viability, spikelet fertility percentage, yield per plant and 1000 grain weight. Hence, it is found that methyl jasmonate can advance anthesis time and thereby plants can escape from the severity of temperature experiencing at the normal flowering time in rice.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Beena

2021

IJARe

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“…Increasing yield is possible with improving yield components such as number of fertile spike, grain number and weight per spike (Aytac and Kinaci, 2009). Recent studies have shown that the use of physiological characteristics such as stoma conductivity, photosynthesis rate, membrane thermo-stability, canopy temperature and chlorophyll content as a selection criterion can improve wheat yield (Yildirim et al, 2009;Rad et al, 2012;Hannachi et al, 2013;Yildirim et al, 2013;Singh et al, 2017;Beena et al, 2018). Physiological characteristics such as canopy temperature and leaf chlorophyll content are important for drought and high temperature resistance studies due to the fact that they can be detected easily and rapidly, as well as having high positive correlations with yield (Reynolds et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

USING LINE × TESTER METHOD AND HETEROTIC GROUPING TO SELECT HIGH YIELDING GENOTYPES OF BREAD WHEAT (Triticum aestivum L.)

Kutlu¹,

Sirel²

2019

Turkish Journal of Field Crops

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Studies on genetic gain, made by direct or indirect phenotypic selection, are needed regularly since they offer valuable information for breeding programs. The purpose of this study to investigate the gene effects on the yield-related traits of the F1 and F2 populations of bread wheat "line×tester" crosses; to identify suitable parents and promising hybrids for development of high yielding varieties; to determine correlations between genetic distances of the parents and heterosis with heterotic groups (HG) based on specific combining ability (SCA). The combining abilities, heritability, heterosis (Ht)-heterobeltiosis (Hb) and the potential of populations as a HG were analysed. According to the results, non-additive gene effects were predominated and narrow sense heritability was low for all examined features, significant combining ability effects were determined for some parents and hybrids. While DH18, DH20 and Harmankaya-99 were good combiners, "DH16×Altay-2000", "DH16×Kate A-1" and "DH21×Kate A-1" were promising hybrids. The yield, Ht and SCA were higher in inter-group hybrids than intra-group hybrids in HG. Although molecular markers are considered more reliable to create HG, only marker selection will not adequate to improve the trait in question because of complex genetic structure and environmental influence. Therefore, HG based on yield-specific SCA can be utilized as a reliable parameter in breeding studies.

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“…Earlier studies mainly focused on the effect of individual stress on morpho-physiological, biochemical, molecular and yield parameters in rice (Beena et al, 2012;Silvas et al, 2015;Naresh et al, 2018;Beena et al, 2018a, Beena et al, 2018c. When abiotic stresses happen concomitantly in eld condition, tolerant varieties identi ed of single stress need not necessarily tolerate the combined effect of stresses (Atkinson et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Molecualr Characterization And Varietal Identification For Multiple Abiotic Stress Tolerance In Rice (Oryza sativa L.)

Ali

Beena

Manikanta

2021

Preprint

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Coexistence of two or more abiotic stresses is common in most of the rainfed lowland and upland rice growing areas of India and worldwide. Rice production under these conditions is not sustainable. Identification and development of multiple abiotic stress tolerant rice varieties are to be addressed. Here we tried to identify multiple abiotic stress tolerant varieties from a collection of earlier identified varieties for single stress and validated the known SSR markers for stress tolerance. Twenty rice genotypes were evaluated for individual abiotic stress such as drought, salinity and temperature initially and the tolerant three genotypes in each case were further evaluated for combination of stresses various physio-morphological and biochemical parameters were recorded . Among the genotypes evaluated for combination of stresses, PTB-7 was found to be tolerant for drought and salinity, Nagina-22 was tolerant against temperature and salinity. However, the seeds did not germinate in the presence of all three stresses simultaneously.. Twenty rice varieties viz ., Chomala, MO-16, PTB-35, PTB-60, PTB-39, PTB-55, PTB-30, PTB-7, CRdhan307, Apo, Vyttila-3, Vyttila-4, Vyttila-5, Vyttila-6, Vyttila-7, Vyttila-8, Vyttila-9, Vyttila-10, Nagina-22, and NL-44 were further investigated using microsatellite markers to confirm the genotypic level of tolerance to combination of abiotic stresses. Rice genotypes were screened using 30 reported simple sequence repeat (SSR) markers that are linked to drought, salinity and temperature. Molecular marker analysis of rice genotypes also confirmed that RM8904 and RM1287 were associated with salinity tolerance, RM2612, RM6100 and RM5749 were linked to high temperature tolerant trait. Population analysis also revealed that there is five subpopulation among rice genotypes.

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Impact of high temperature stress during reproductive and grain filling stage in rice

Cited by 15 publications

References 0 publications

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

USING LINE × TESTER METHOD AND HETEROTIC GROUPING TO SELECT HIGH YIELDING GENOTYPES OF BREAD WHEAT (Triticum aestivum L.)

Molecualr Characterization And Varietal Identification For Multiple Abiotic Stress Tolerance In Rice (Oryza sativa L.)

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