Identification and characterization of large-effect quantitative trait loci for grain yield under lowland drought stress in rice using bulk-segregant analysis

Venuprasad, R.; Dalid, Cheryl; Valle, M. Del; Zhao, Di; Espiritu, M.J.; Cruz, Ma Teresa Sta; Amante, Modesto; Kumar, Arvind; Atlin, G. N.

doi:10.1007/s00122-009-1168-1

Cited by 286 publications

(312 citation statements)

References 38 publications

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“…The QTL QGyp2a for GYP detected in the region of 10693848-11540193 on chromosome 2 was mapped together with qDTY 2.1 affecting grain yield (Venuprasad et al 2009;Dixit et al 2012), the QTL for osmotic adjustment (Robin et al 2003), and the QRgvd2 for root growth rate in volume under drought conditions (Yue et al 2006). The QTL QSnp3a governing SpNP was localised in the region of 3502670-4681740 on chromosome 3 and was mapped together with the rn3 for root number in PVC-pipe at mature stage (Qu et al 2008), QRvd3 for root volume, and QRgvd3 for root growth rate in volume under drought conditions (Yue et al 2006), as well as the QTL for leaf rolling score in paddy soil condition (Yue et al 2005).…”

Section: Effect Of Genetic Background On Detection Of Qtls For Dtmentioning

confidence: 99%

“…Drought can occur at any stage during the rice-growing season, due to inadequate irrigation, uneven distribution of rainfall, variation in rainfall patterns from one year to another or inadequate rainfall in large areas (Zhang 2007). The reproductive stage (from panicle initiation to flowering) is recognised as the most critical stage at which drought stress can directly affect grain yield (Lanceras et al 2004;Venuprasad et al 2009). Therefore, enhancement of drought tolerance (DT) in rice is becoming an important strategy to stabilise rice production in areas with rainfed agriculture.…”

Section: Introductionmentioning

confidence: 99%

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Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

et al. 2014

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Abstract. Drought is one of the major abiotic stresses limiting rice (Oryza sativa L.) production. Quantitative trait loci (QTLs) for drought tolerance (DT) at the reproductive stage were identified with two sets of reciprocal introgression lines derived from Lemont Â Teqing. In total, 29 and 23 QTLs were identified in the Teqing and Lemont backgrounds, respectively, during the reproductive stage under drought and irrigated conditions for spikelet number per panicle, seed fertility, filled grain weight per panicle, plant height, and grain yield per plant. Most of these QTLs showed obvious differential expressions in response to drought stress. Another 21 QTLs were detected by the ratio of trait values under drought stress relative to the normal irrigation conditions in the two backgrounds. For 28 DT QTLs, the Teqing alleles at 23 loci had increased trait values and could improve DT under drought stress. Only five (17.9%) DT QTLs (QSnp1b, QSnp3a, QSnp11, QSf8, and QGyp2a) were consistently detected in the two backgrounds, clearly suggesting overwhelming genetic background effects on QTL detection for DT. Seven of the DT QTL regions identified were found to share the same genomic regions with previously reported DT-related genes. Introgressing or pyramiding of favourable alleles from Teqing at the validated QTLs (QSnp3a, QSnp11 and QGyp2a) into Lemont background may improve DT level of Lemont.

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Section: Effect Of Genetic Background On Detection Of Qtls For Dtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

et al. 2014

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“…Both QTLs showed a very high effect (R2 = 16.3 and 30.7%) under severe lowland reproductivestage drought. These QTLs also showed pleiotropic effects on other traits such as DTF and PHT (Venuprasad et al, 2009). Another QTL, qDTY6.1 had strong effect on yield in aerobic drought stress conditions (Venuprasad et al, 2012b).…”

Section: Qtl For Yield and Yield Related-traits Under Droughtmentioning

confidence: 91%

The effects of drought on rice cultivation in sub-Saharan Africa and its mitigation: A review

Noelle¹,

Rodrigue²,

Gnikoua³

2018

Afr. J. Agric. Res.

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Drought is the primary cause of yield loss in agriculture throughout the world, and is currently the most common reason for global food shortages. Three-quarter of the most severe droughts in the last ten years have been in Africa, the continent which already has the lowest level of crop production and drought adaptive capacity. The increased incidences of drought and erratic rainfall have thrown small holder farmers in Africa into deep poverty, hunger and malnutrition. In this paper, the drought situation in sub-Saharan Africa and its impact on rice production was reviewed. Rice is particularly vulnerable to droughts as it has higher water requirement as compared to other crops. The review has also highlighted physiological and molecular plant responses to drought, with special focus on effects of drought stress on rice grain yield and other related-traits. With climate change predicted to exacerbate the problem of water security in Africa, it is imperative that we develop robust, well-planned and informed strategies to mitigate against drought. Various drought mitigation strategies including breeding for drought tolerance and water harvesting and conservation techniques are also outlined. In order to adapt to drought, there is need for a broad based approach that includes development of appropriate policies, putting in place necessary water related investments and institutions as well as capacity building at various levels.

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“…Selection of germplasm with reproductive drought-tolerance has been based on grain yield-related traits, with selection often being conducted under field conditions. Several QTL with widely varying contribution to the grain yield phenotype under drought conditions were identified in wheat and rice (Kato et al 2000;Lanceras et al 2004;Wang et al 2005;Bernier et al 2007;Kirigwi et al 2007;Kumar et al 2007;Venuprasad et al 2009). A major problem with drought tolerance selection is interference with avoidance/escape mechanisms (e.g.…”

Section: Manipulation Of Abiotic Stress Tolerance Using Transgenic Apmentioning

confidence: 99%

Yield stability for cereals in a changing climate

Powell

Ravash

et al. 2012

Functional Plant Biol.

125

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Abstract. The United Nations Food and Agriculture Organisation (FAO) forecasts a 34% increase in the world population by 2050. As a consequence, the productivity of important staple crops such as cereals needs to be boosted by an estimated 43%. This growth in cereal productivity will need to occur in a world with a changing climate, where more frequent weather extremes will impact on grain productivity. Improving cereal productivity will, therefore, not only be a matter of increasing yield potential of current germplasm, but also of improving yield stability through enhanced tolerance to abiotic stresses. Successful reproductive development in cereals is essential for grain productivity and environmental constraints (drought, cold, frost, heat and waterlogging) that are associated with climate change are likely to have severe effects on yield stability of cereal crops. Currently, genetic gains conferring improved abiotic stress tolerance in cereals is hampered by the lack of reliable screening methods, availability of suitable germplasm and poor knowledge about the physiological and molecular underpinnings of abiotic stress tolerance traits.

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Identification and characterization of large-effect quantitative trait loci for grain yield under lowland drought stress in rice using bulk-segregant analysis

Cited by 286 publications

References 38 publications

Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

The effects of drought on rice cultivation in sub-Saharan Africa and its mitigation: A review

Yield stability for cereals in a changing climate

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