A5071600246- Rice Cultivation and Yield Improvement
- Genetic Mapping and Diversity in Plants and Animals
- GABA and Rice Research
- Plant responses to water stress
- Genetics and Plant Breeding
- Wheat and Barley Genetics and Pathology
- Plant Genetic and Mutation Studies
- Insect Pest Control Strategies
- Insect Resistance and Genetics
- Plant-Microbe Interactions and Immunity
- Genetically Modified Organisms Research
- Plant Pathogenic Bacteria Studies
Tamil Nadu Agricultural University
2020-2025
Increases in rice productivity are significantly hampered because of the increase occurrence abiotic stresses, including drought, salinity, and submergence. Developing a variety with inherent tolerance against these major stresses will help achieve sustained production under unfavorable conditions. The present study was conducted to develop stress-tolerant genotypes genetic background popular Improved White Ponni (IWP) by introgressing effect quantitative trait loci (QTLs) conferring drought...
The increased use of chemicals in rice farming poses significant issues regarding the emergence pesticide/fungicide resistance and environmental sustainability concerns. This study was aimed at genetic improvement blast, bacterial leaf blight (BB) gall midge a popular variety CO 51 which already harbours blast gene Pi54. Efforts were made to pyramid an additional Pi9 along with two BB genes (xa13 Xa21) (Gm1 Gm4) into elite enhance level biotic stresses. superior lines selected using...
Introduction Rice, one of the major staple food crops is frequently affected by various biotic/abiotic stresses including drought, salinity, submergence, heat, Bacterial leaf blight, Brown plant hopper, Gall midge, Stem borer, Leaf folder etc. Sustained increase yield growth highly necessary to meet projected demand in rice production during year 2050. Hence, development high yielding and multiple stress tolerant varieties adapted wider environments will serve need. Methods A systematic MAB...
Across the globe, rice cultivation is seriously affected by blast disease, caused Magnaporthe oryzae. This disease has heavy yield loss to farmers over past few years. In this background, most affordable and eco-friendly strategy introgress blast-resistant genes from donors into elite cultivars. However, it not only challenging evolve such resistance lines using conventional breeding approaches, but also a time-consuming process. Therefore, marker-assisted introduction of been proposed as...
ABSTRACT Blast caused by Pyricularia oryzae (synonym Magnaporthe ) is a major fungal disease affecting productivity and quality in rice‐growing areas globally. A genome‐wide association study (GWAS) was performed using the blast score(s) whole‐genome sequence data pertaining to subset of 280 diverse accessions IRRI 3 K Rice Genome panel. Continuous variation observed, with 8.9% total resistant, 39.6% moderately 37.2% susceptible 14.2% susceptible, average severity ratings 0 3, > 5, 5 7 9,...
The widespread adoption of direct-seeded rice cultivation over traditional puddled transplanted has become necessary due to labor shortages and water scarcity. Amidst several biotic abiotic challenges faced by direct seeded cultivation, weeds remain as a major bottleneck which negatively influences the performance crop. Chemical method weed control is one most economical ways compared other management techniques. Development lines are resistant new classes broad-spectrum herbicides have...
In the ever-changing climatic conditions, it has become important to enhance rice productivity ensure global food security. Drought is one of major limiting factors in pro- duction. during reproductive stage results maximum or complete yield loss. Efforts have been taken develop drought-tolerant lines by introgressing three drought-effect QTLs, viz. qDTY1.1, qDTY2.1, and qDTY3.1, from Apo into a susceptible popular variety, Improved White Ponni (IWP). Backcross inbred IWP × were developed...
By 2050, the rice production needs to be increased by at least 50% in order meet growing food demands of global population. Among various yield limiting factors, high temperature is fast becoming a major threat sustain yields due its frequency occurrence and severity stress events. The development heat-resilient cultivars has been slow lack relevant donors for heat tolerance traits limited information regarding genetic basis these component traits. early morning flowering (EMF) trait,...
A total of 36 colocated QTLs associated with plant production traits were mapped using IR62266/Norungan recombinant inbred lines under drought and non-stress conditions in target populations environment. Multi-model composite interval mapping multi-environment analysis detected seven consistent for on chromosomes 1, 2, 3, 6, 10 11. height, number tillers, biomass, spikelet fertility grain yield identified chr. 1 (RM5389-RM11943-RM5794), 2 (RM324-RM5390 RM12460-RM423-RM5345), 3...
Given the urgency of rising sea levels and need to sustain food production, developing flood-tolerant crops is essential. The aim this study was assess genetic potential cross CO51x13-6 (NIL CO43Sub1) in BC2F4 BC2F5 generations using Parent Offspring regression analysis. Significant variation observed across a wide range traits both generations. distribution important traits, including plant height, number productive tillers per plant, panicle length, single yield, showed positively skewed...
High temperature induces yield losses in rice, by affecting pollination, fertilization and also grain quality. stress coinciding with the filling period affects starch granule compaction thereby leading to reduced head rice recovery (HRR). The broken grains significantly reduce price of 50% market. Hence, development varieties that exhibit a lower reduction quality coupled higher under high has become major mandate breeding programs. present study was undertaken survey genetic variation for...
Rice (Oryzasativa L.) is one of the most important staple foods for more than half world’s population and influences livelihoods economies several billion people. Drought stress major constraint to rice production yield stability in rainfed ecosystems. Efforts have been made identify putative traits, which can confer drought resistance grown under lowland. However, little progress has incorporating tolerance abiotic stresses such as drought, since fundamental mechanisms are poorly...
Rice is the staple food for more than half of global population and rice production has to be increased by at least 50% during 2030 meet requirements rapidly increasing population. yield determined several quantitative traits viz. number productive tillers, panicle length, grains per panicle, grain size, photosynthetic efficiency. Grain size a major determinant it primarily governed width, thickness. Several candidate genes modulating components have been discovered put into breeding...
Abstract Early-morning flowering (EMF) trait is supposed to be effective in retaining grain yield due mitigation of heat-induced spikelet sterility at rice. This study evaluated (i) phenotypic differences between a near-isogenic line carrying QTL for EMF trait, designated as IR64+ qEMF3 , and recurrent parent, IR64, under wide variation climates (ii) whether an can retain heat stress flowering. had significant earlier flower opening time (FOT) diverse environmental conditions including...
An early-morning flowering (EMF) trait is supposed to be effective in enhancing grain yield due mitigation of heat-induced spikelet sterility at rice. This study evaluated (i) phenotypic differences between a near-isogenic line carrying QTL for EMF trait, designated as IR64+qEMF3, and recurrent parent, IR64, under wide variation climates (ii) whether an can enhance heat stress flowering. IR64+qEMF3 had significant earlier flower opening time (FOT) diverse environmental conditions including...