Susan mccouch's research focuses on rice and includes publication of the first molecular map of the rice genome in 1988, early qtl studies on disease resistance, drought tolerance, maturity and yield, cloning of genes underlying domestication traits, and demonstrating that low-yielding wild and exotic oryza species harbor genes that can enhance the performance of modern, high-yielding cultivars. Drought tolerance for use as donors in breeding and gene discovery is one of the main challenges for rice research (serraj and atlin, 2008) the present study was carried out to evaluate the drought tolerance of various rice genotypes with a wide. Development of rice cultivars with artificially-imposed drought stress for improving rice improved drought tolerance is thus an important grain yield under natural and artificially imposed element in reducing risk, increasing productivity, and drought stress (venuprasad et al 2007.
Manual on breeding rice for drought-prone environments iv • the“workshop on field screening for drought tolerance in rice” held in 2001 at icrisat highlighted the need for a practical guide for the breeding of rice for drought-prone environ-ments some of the material used in this manual was reported at the workshop. Worldwide, approximately 27 million ha of rice are grown in upland rather than paddy fields, and is subject to drought stress to counter this stress, it is desirable to breed new rice cultivars with improved drought tolerance. Bailey-serres's lab investigated the drought tolerance of flood-tolerant rice plants because her research team wanted to be sure that the flood tolerance trait, which the lab has studied for many.
To facilitate the selection or development of drought tolerant rice varieties, a thorough understanding of the various mechanisms that govern the yield of rice under water stress condition is a prerequisite. Dr jaquie mitchell has a major research focus on abiotic stress tolerance in crop physiology and agronomy she has been working at the university of queensland in the school of agriculture and food sciences since 1990. Drought management in rice (oryza sativa l) with the use of hydrogel and bio-agent (trichoderma) under varanasi condition of eastern uttar pradesh publisher: institute of agricultural sciences, banaras hindu university, varanasi. Rice plants engineered to have fewer stomata – tiny openings used for gas exchange – are more tolerant to drought and resilient to future climate change, a new study has revealed scientists from the university of sheffield have discovered that engineering a high-yielding rice cultivar to have. Abiotic stresses such as drought, salinity, submergence, and nutrient deficiencies limit rice production recent advances in our understanding of the physiology and molecular biology of stress tolerance in rice are being used to develop improved rice varieties.
The presence of conserved regions conferring drought tolerance in upland rice and the high susceptibility of high-yielding post-green revolution varieties provide unique opportunities for plant breeders to move drought tolerance alleles from upland drought-tolerant donors to lowland drought-susceptible rice varieties. 1 genetic studies on drought tolerance and grain shattering in rice by jimmy lamo bsc agric, msc (crop science) makerere a thesis submitted in partial fulfillment of the requirements for the degree. Rice (liu et al, 2008), and aspen reduced leaf senescence and increased drought tolerance (lee et al, 2012) evidence has suggested that the wrky family of thesis) showing drought-induced leaf senescence continue to be photosynthetically active (young et al, 2004. Breeding maize for drought tolerance: diversity characterization and linkage disequilibrium of maize paralogs zmlox4 and zmlox5 a thesis by maize production surpasses wheat by over 150 million metric tons, rice by _____ this thesis follows the style of crop science 2 figure 1-1 comparison of 2011 rainfall totals and maize production. Effect of reduced plant height on drought tolerance in rice abstract drought stress due to water deﬁcit is a major problem of rice cultivation as a most drought-sensitive crop plant a rice mutant line (mt58) was developed after effect of reduced plant height on drought tolerance in rice.
Rice ( oryza sativa l) is the most important food crop of the world but drought stress is a serious limiting factor to rice production and yield stability in rainfed areas in order to design an efficient breeding program for synthesis of new varieties. Disaggregating the effect of drought and heat stress during flowering on spikelet fertility in rice a thesis submitted in partial fulfillment of the requirements for the degree of to spikelet temperature and the tolerance of a rice variety to high air-temperature induced. Effect of silicon on plant growth and drought stress tolerance by kaerlek w janislampi a thesis submitted in partial fulfillment of the requirements for the degree.
Such changes can bring about drought tolerance, whereby plants continue to function at the low water potentials caused by water deficit (hall, 1993) a central response to water deficit is often increased synthesis of aba, which in turn induces a range of developmental (avoidance) and physiological or biochemical (tolerance) mechanisms. The value of rice production lost in drought years has been estimated to be as high as 36 percent of the total value of rice production in eastern india, and the economic costs of droughts to rainfed rice farmers in eastern india are of the order of several hundred million dollars per year. Stress and disease tolerance : breeding for drought resistance in rice is rice more drought sensitive than other crops/cereals rice has generally a lowland and semi-aquatic adaptation, a shallow compact root system (especially in lowlands.
Drought is considered a major constraint in both upland and rainfed lowland rice production in south and southeast asia, and the presence of drought tolerance in african rice oryza glaberrima was an important objective for developing new varieties. The predominantly rice-growing areas in asia are often threatened by severe abiotic stresses, the most common being drought which affects the yield potential of rice across all agro-climatic regions of the globe. Plant breeding graduate thesis library 2017 graduates name thesis/dissertation title advisor the improvement of drought tolerance in maize m smith graduate research exploring the genetic and physiological mechanisms of a 1 tolerance in rice(oryza sativa l) s mccouch research scientist. Genetic mapping of potential qtls associated with drought tolerance in wheat s malik1, mehboob-ur-rahman2 andt a malik3 this work is a part of my phd thesis research introduction genetic mapping of potential qtls associated with drought tolerance in wheat.