A5000420039- Rice Cultivation and Yield Improvement
- Genetic Mapping and Diversity in Plants and Animals
- GABA and Rice Research
- Crop Yield and Soil Fertility
- Genetics and Plant Breeding
- Plant responses to water stress
- Weed Control and Herbicide Applications
- Agronomic Practices and Intercropping Systems
- Agricultural Science and Fertilization
- Allelopathy and phytotoxic interactions
- Plant and animal studies
- Soybean genetics and cultivation
- Leaf Properties and Growth Measurement
- Plant Stress Responses and Tolerance
- Agriculture, Soil, Plant Science
- Peanut Plant Research Studies
- Transgenic Plants and Applications
- Agricultural Systems and Practices
- African Botany and Ecology Studies
- Agricultural pest management studies
- Botany, Ecology, and Taxonomy Studies
- Plant Parasitism and Resistance
- Soil Carbon and Nitrogen Dynamics
- Nuts composition and effects
- Ruminant Nutrition and Digestive Physiology
Tamil Nadu Agricultural University
2006-2021
Kerala Agricultural University
2021
Texas Tech University
1997-2008
Drought stress is a major constraint to rice ( Oryza sativa L.) production and yield stability in many rainfed regions of Asia, Africa, South America. The genetic improvement adaptation drought addressed through the conventional approach by selecting for its over locations years. Because low heritability under inherent variation field, such selection programs are expensive slow attaining progress. objective this paper review current knowledge physiology molecular genetics which have...
Drought stress is the major constraint to rice ( Oryza sativa L.) production and yield stability in rainfed ecosystems. Identifying genomic regions contributing drought resistance will help develop cultivars suitable for through molecular marker assisted breeding. Quantitative trait loci (QTLs) linked plant water indicators, phenology traits under irrigated conditions were mapped by means of a doubled‐haploid (DH) population 154 lines from cross CT9993‐5‐10‐1‐M/IR62266‐42‐6‐2. The DH...
Abstract Rice is used as a model cereal to study drought response at the molecular level, with goal of applying results other cereals. To assess relevance from rice species, kinetics development and plant tolerant susceptible tropical ( Oryza sativa L.) subtropical wheat Triticum aestivum cultivars were compared under vegetative reproductive stage in pot experiments. Water was withheld during until available soil moisture content 30 % field capacity (FC) or leaf wilting observed, then...
Abstract Background Drought stress is a major limitation to rainfed rice production and yield stability. Identifying yield-associated quantitative trait loci (QTLs) that are consistent under drought predominant in target environments, as well across different genetic backgrounds, will help develop high-yielding cultivars suitable for water-limited environments through marker-assisted breeding (MAB). Considerable progress has been made mapping QTLs resistance traits rice; however, few have...
Drought is the major abiotic stress limiting rice (Oryza sativa) production and yield stability in rainfed lowland upland ecosystems. Root systems play an important role drought resistance. Incorporation of root selection criteria resistance improvement difficult due to lack reliable efficient screening techniques. Using a wax-petrolatum layer system simulated compacted soil layers, traits were evaluated doubled haploid (DH) population derived from cross between 'IR64' 'Azucena'. Twelve...
Osmotic adjustmen(OA)is a major component of drought resistance. Four different methods for measuring OA in plants are general use, but there is no information on the comparative performance these methods. Two similar experiments were designed to evaluate four diverse indica and japonica cultivars rice ( Oryza sativa L.) subjected drying cycle large pots greenhouse. The were:(i) derivation from regressions leaf relative water content (RWC) osmotic potential(OP);(ii) estimation OP stressed...
Drought is the major abiotic stress limiting rice (Oryza sativa) production and yield stability in rainfed lowland upland ecosystems. Root systems play an important role drought resistance. Incorporation of root selection criteria resistance improvement difficult due to lack reliable efficient screening techniques. Using a wax-petrolatum layer system simulated compacted soil layers, traits were evaluated doubled haploid (DH) population derived from cross between 'IR64' 'Azucena'. Twelve...
Abstract Drought is the major constraint limiting rainfed rice production. The ability of roots to penetrate compacted soils and therefore increase water extraction capacity, osmotic adjustment dehydration tolerance leaves enables plant tolerate drought. Experiments were conducted determine extent genetic variation in root penetration index, among indica accessions adapted lowlands as well traditional varieties from uplands. Root index was evaluated a system using wax–petrolatum layers...
Abstract The allelopathic potential of Eucalyptus globulus Labill. (gum tree) fresh and dried leaf leachates was studied using two perennial weeds, viz. purple nutsedge (Cyperus rotundus L.) bermuda grass (Cynodon dactylon L. Pers) as test weeds. Aqueous leachate leaves eucalyptus significantly suppressed the establishment vegetative propagules early seedling growth Leachate cuttings had inhibitory effect on but showed promotion nutsedge. Similarly differential influence There is a...
In Asia and Africa the poor tend to live in marginal environments where droughts floods are frequent. Global warming is expected increase frequency of these weather-induced perturbations crop production. Drought tolerance (DT) has been one most difficult traits improve genetic improvement programs worldwide. Biotechnology provides breeders with a number new tools that may help develop more drought tolerant varieties such as marker assisted selection (MAS), molecular breeding (MB), transgenic...
The rapid progress in rice genotyping must be matched by advances phenotyping. A better understanding of genetic variation for drought response, root traits, and practical methods studying them are needed. In this study, the OryzaSNP set (20 diverse genotypes that have been genotyped SNP markers) was phenotyped a range field container studies to study diversity growth response drought. Of traits measured across more than 20 experiments, dry weight showed most stable genotypic performance...