Yield response of rice (Oryza sativa L.) genotypes to different types of drought under rainfed lowlands

Pantuwan, G.; Fukai, S.; Cooper, Mark; Rajatasereekul, S.; O’Toole, J. C.

doi:10.1016/s0378-4290(01)00187-3

Cited by 204 publications

(124 citation statements)

References 18 publications

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“…The GY of CT9993 and DH lines was reduced by approximately 50% under W3. As mentioned by Pantuwan et al (2002), a drought intensity that causes a 50% yield reduction is considered a critical point for the expression of drought tolerance mechanisms in rice. Therefore, we considered W3 and W4 the most appropriate intensities of drought stress to monitor drought tolerance mechanisms in this experiment.…”

Section: Grain Yieldmentioning

confidence: 99%

Quantitative Trait Loci Associated with Drought Tolerance at Reproductive Stage in Rice

et al. 2004

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Drought is a major constraint to rice (Oryza sativa) yield and its stability in rainfed and poorly irrigated environments. Identifying genomic regions influencing the response of yield and its components to water deficits will aid in our understanding of the genetics of drought tolerance and development of more drought tolerant cultivars. Quantitative trait loci (QTL) for grain yield and its components and other agronomic traits were identified using a subset of 154 doubled haploid lines derived from a cross between two rice cultivars, CT9993-510 to 1-M and IR62266-42 to 6-2. Drought stress treatments were managed by use of a line source sprinkler irrigation system, which provided a linearly decreasing level of irrigation coinciding with the sensitive reproductive growth stages. The research was conducted at the Ubon Rice Research Center, Ubon, Thailand. A total of 77 QTL were identified for grain yield and its components under varying levels of water stress. Out of the total of 77 QTL, the number of QTL per trait were: 7-grain yield (GY); 8-biological yield (BY); 6-harvest index (HI); 5-d to flowering after initiation of irrigation gradient (DFAIG); 10-total spikelet number (TSN); 7-percent spikelet sterility (PSS); 23-panicle number (PN); and 11-plant height (PH). The phenotypic variation explained by individual QTL ranged from 7.5% to 55.7%. Under wellwatered conditions, we observed a high genetic association for BY, HI, DFAIG, PSS, TSN, PH, and GY. However, only BY and HI were found to be significantly associated with GY under drought treatments. QTL flanked by markers RG104 to RM231, EMP2_2 to RM127, and G2132 to RZ598 on chromosomes 3, 4, and 8 were associated with GY, HI, DFAIG, BY, PSS, and PN under drought treatments. The aggregate effects of these QTL on chromosomes 3, 4, and 8 resulted in higher grain yield. These QTL will be useful for rainfed rice improvement, and will also contribute to our understanding of the genetic control of GY under drought conditions at the sensitive reproductive stage. Close linkage or pleiotropy may be responsible for the coincidence of QTL detected in this experiment. Digenic interactions between QTL main effects for GY, BY, HI, and PSS were observed under irrigation treatments. Most (but not all) DH lines have the same response in measure of productivity when the intensity of water deficit was increased, but no QTL by irrigation treatment interaction was detected. The identification of genomic regions associated with GY and its components under drought stress will be useful for marker-based approaches to improve GY and its stability for farmers in drought-prone rice environments.In rainfed lowland areas, one of the major abiotic constraints depressing rice (Oryza sativa) production is water stress, including deficit (drought) or excess water (flood; O' Toole and Chang, 1979;Herdt, 1991;Lin and Shen, 1993). Drought stress is a serious limiting factor to rice production and yield stability in rainfed rice areas (Dey and Upadhyaya, 1996). The occurrence of drought can be as...

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Section: Grain Yieldmentioning

confidence: 99%

Quantitative Trait Loci Associated with Drought Tolerance at Reproductive Stage in Rice

et al. 2004

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“…A good drought tolerance index should have the power to discriminate between genotypes and must be able to identify superior ones in both drought prone and favorable environments (Saba et al, 2001;. However, the effectiveness of selection indices in differentiating resistant cultivars depends on the stress intensity of target environment varying over years and locations (Panthuwan et al, 2002;. The lines with outstanding performances over different stress intensities should be selected.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of drought tolerance indices under different stress severities for bread wheat selection

Bennani¹,

Nsarellah²,

Jlibene³

et al. 2017

Aust J Crop Sci

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Drought is a world-wide spread problem adversely affecting bread wheat production in rainfed agro-ecosystems. Development and identification of efficient selection criteria for developing drought tolerant wheat varieties with stable and high yield potential is of paramount importance. This study was carried out to evaluate 24 indices for selecting the best high yielding and drought tolerant cultivars, among 40 bread wheat genotypes, under four levels of stress intensities: no stress, mild (0.25, 0.35) and severe (0.57). The mean productivity (MP), modified stress tolerance index (MSTIk), superiority index (Pi), mean relative performance (MRP), relative efficiency index (REI), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HARM) and relative decrease in yield (RDY) showed a high power of discrimination among genotypes, and expressed significant correlations with yields under both stress and non-stressed conditions at all stress intensities. This group of indices was capable to select the highest mean yield associated with the least mean variance at 20 % selection pressure. However, as the stress intensity became greater (>35 %), the efficiency of these indices decreased, especially at high stress intensity (57%), where only Pi and MP were still able to target the highest performances. MRP, REI, GMP, RDY and STI can be used interchangeably. Based on GGE analysis, the best performing genotypes were AUS30355, followed by Gladius, Amir-2 and AUS30354 that showed high yield and stability across all the environments. These genotypes are recommended for direct release and/or for use as parents in the breeding programs.

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“…Severe drought can disturb the photosynthetic function of plants and even destroy vulnerable individuals. It potentially and significantly affects global carbon balance through declining crop yields, delaying in agricultural planting schedules, and increasing forest losses, insect infestation, and diseases (Pantuwan et al, 2002;Parry et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of drought on net primary productivity: Roles of temperature, drought intensity, and duration

Sun¹,

Zhao²,

Wang

2016

Chin. Geogr. Sci.

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Northeast China has experienced frequent droughts over the past fifteen years. However, the effects of droughts on net primary productivity (NPP) in Northeast China remain unclear. In this paper, the droughts that occurred in Northeast China between 1999 and 2013 were identified using the Standardized Precipitation Evapotranspiration Index (SPEI). The NPP standardized anomaly index (NPP-SAI) was used to evaluate NPP anomalies. The years of 1999, 2000, 2001, and 2007 were further investigated in order to explore the influence of droughts on NPP at different time scales (3, 6, and 12 months). Based on the NPP-SAI of normal areas, we found droughts overall decreased NPP by 112.06 Tg C between 1999 and 2013. Lower temperatures at the beginning of the growing season could cause declines in NPP by shortening the length of the growing season. Mild drought or short-term drought with higher temperatures might increase NPP, and weak intensity droughts intensified the lag effects of droughts on NPP.

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Yield response of rice (Oryza sativa L.) genotypes to different types of drought under rainfed lowlands

Cited by 204 publications

References 18 publications

Quantitative Trait Loci Associated with Drought Tolerance at Reproductive Stage in Rice

Quantitative Trait Loci Associated with Drought Tolerance at Reproductive Stage in Rice

Efficiency of drought tolerance indices under different stress severities for bread wheat selection

Effects of drought on net primary productivity: Roles of temperature, drought intensity, and duration

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