A5073789692- Rice Cultivation and Yield Improvement
- Genetic Mapping and Diversity in Plants and Animals
- GABA and Rice Research
- Genetics and Plant Breeding
- Plant Disease Resistance and Genetics
- Plant responses to water stress
- Plant Pathogenic Bacteria Studies
- Plant Virus Research Studies
- Plant Genetic and Mutation Studies
- Plant Micronutrient Interactions and Effects
- Plant Disease Management Techniques
- Plant nutrient uptake and metabolism
- Wheat and Barley Genetics and Pathology
- Agricultural Economics and Practices
- Agriculture, Soil, Plant Science
- Asian Geopolitics and Ethnography
- Antioxidant Activity and Oxidative Stress
- Genetically Modified Organisms Research
- Remote Sensing in Agriculture
- Biofuel production and bioconversion
- Wastewater Treatment and Nitrogen Removal
- Food Science and Nutritional Studies
- Algal biology and biofuel production
- Soybean genetics and cultivation
- Insect Resistance and Genetics
Indian Institute of Rice Research
2016-2025
Unfavorable climatic changes have led to an increased threat of several biotic and abiotic stresses over the past few years. Looking at massive damage caused by these stresses, we undertook a study develop high yielding climate-resilient rice, using genes conferring resistance against blast (Pi9), bacterial leaf blight (BLB) (Xa4, xa5, xa13, Xa21), brown planthopper (BPH) (Bph3, Bph17), gall midge (GM) (Gm4, Gm8) QTLs for drought tolerance (qDTY1.1 qDTY3.1) through marker-assisted forward...
Advanced backcross introgression lines (BILs) developed from crosses of Oryza sativa var. Swarna/O. nivara accessions were grown and evaluated for yield related traits. Trials conducted consecutive three seasons in field conditions a randomized complete block design with replications. Data on traits under irrigated analyzed using the Additive Main Effect Multiplicative Interaction (AMMI), Genotype × Environment (GGE) modified rank-sum statistic (YSi) stability. BILs viz., G3 (14S) G6 (166S)...
Climate extremes such as drought and flood have become major constraints to the sustainable rice crop productivity in rainfed environments. Availability of suitable climate-resilient varieties could help farmers reduce grain yield losses resulting from climatic extremities. The present study was undertaken with an aim develop high-yielding submergence tolerant using marker assisted introgression qDTY1.1, qDTY2.1, qDTY3.1 Sub1. Performance near isogenic lines (NILs) developed background...
The complexity of genotype × environment interactions under drought reduces heritability, which determines the effectiveness selection for tolerance and development tolerant varieties. Genetic progress measured through changes in yield performance over time is important determining efficiency breeding programmes test cultivars are replaced each year on assumption that new will surpass older cultivars. goal our study was to determine annual rate genetic gain rice grain a drought-prone rainfed...
Abstract Direct selection for yield under drought has resulted in the release of a number drought-tolerant rice varieties across Asia. In this study, we characterized physiological traits that have been affected by strategy breeding trials sites Bangladesh, India, and Nepal. Drought- lines showed consistently longer flag leaves lower stomatal density than our drought-susceptible check variety, IR64. The influence environmental parameters other treatments on leaf was evidenced close grouping...
Summary To increase rice yields and feed billions of people, it is essential to enhance genetic gains. However, the development new varieties hindered by longer generation times seasonal constraints. address these limitations, a speed breeding facility has been established robust protocol, SpeedFlower developed that allows growing 4–5 generations indica and/or japonica in year. Our findings reveal high red‐to‐blue (2R > 1B) spectrum ratio, followed green, yellow far‐red (FR) light, along...
Bacterial blight (BB) in rice caused by Xanthomonas oryzae pv. (Xoo) is a major global production constraint, particularly irrigated and rain-fed lowland areas. Improved Samba Mahsuri (ISM) an elite, high-yielding, fine-grain type, BB-resistant variety possessing three genes (Xa21, xa13 xa5) highly popular the southern parts of India. As BB pathogen dynamic evolution virulence against deployed resistance common, we added novel gene, Xa38, into ISM through marker-assisted backcross breeding...
The elite Indian rice variety, Naveen is highly susceptible to major biotic and abiotic stresses such as blast, bacterial blight (BB), gall midge (GM) drought which limit its productivity in rainfed areas. In the present study, a combined approach of marker-assisted forward (MAFB) back cross (MABC) breeding was followed introgress three genes, viz., Pi9 for Xa21 Gm8 QTLs, viz ., qDTY 1 . , 2 4 conferring increased yield under background Naveen. At each stage advancement, gene-based/linked...
Grain protein content (GPC) is gaining attention due to increasing consumer demand for nutritious foods. The present study carried out at ICAR-IIRR, Hyderabad, focused on the identification of quantitative trait loci (QTLs) linked with GPC and other quality traits. We utilized a population 188 F2 individuals developed from BPT 5204 (low GPC) X JAK 686 (high QTL analysis. analysis yielded four significant QTLs GPC, three amylose content, multiple qPC1.2, major in milled rice, was located...
Among the different challenges related to rice (Oryza sativa L.) cultivation, drought, bacterial leaf blight (BLB), and blast are key stresses that significantly affect grain yield (GY) in rice. To ameliorate this issue, marker-assisted forward breeding (MAFB) coupled with a simultaneous crossing approach was used combine three drought tolerant quantitative trait loci (QTL)-qDTY1.1 , qDTY3.1 qDTY12.1 -four BLB genes-Xa4, xa5, xa13, Xa21-and one blast-resistance gene, Pi9, elite cultivar...
Lodging resistance in rice is a complex trait determined by culm morphological and physical strength traits, these traits are major determinant of yield. We made detailed analysis various component with the aim deriving optimized parameters for measuring strength. Genotyping sequencing (GBS)-based genome-wide association study (GWAS) was employed among 181 genotypes dissecting genetic control traits. The VanRaden kinship algorithm using 6,822 filtered single-nucleotide polymorphisms (SNPs)...
Major biotic stresses viz., bacterial blight (BB) and blast brown plant hopper (BPH) coupled with abiotic like drought stress, significantly affect rice yields. To address this, marker-assisted intercross (IC) breeding involving multiple donors was used to combine three BB resistance genes-xa5, xa13 Xa21, two genes-Pi9 Pi54, BPH genes-Bph20 Bph21, four tolerant quantitative trait loci (QTL)-qDTY1.1, qDTY2.1, qDTY3.1 qDTY12.1-in the genetic background of elite Indian cultivar 'Krishna Hamsa'....
Rice is the most important food crop both in value and volume for Asian population. Frequent drought, flood salinity stresses exacerbated by global climate change adversely affect rice production more than fifty percent of growing areas. Green revolution high yielding varieties carrying sd1 dwarfing gene have almost fully replaced traditional resilient landraces rice. However, these were bred primarily yield under input conditions therefore are sensitive to adverse climatic conditions....
Abstract A diverse set of 107 rice genotypes was evaluated for yield, shattering and dormancy traits. Analysis variance revealed sizable variation while skewness kurtosis values indicated near-normal distribution most the traits, thus quantitative nature controlled by many genes. highly significant deviation from a normal % their qualitative inheritance. Four promising ‘IRGC1723’ (early with 65 days to flowering), ‘IRGC 11108’ ‘RNR 15459’ (high grain number – 358 low average <5%), 11718’...
DRR Dhan 71 [IET 29421 (RP 6324-123-14-4-1)], an aerobic rice variety was developed from CR 691-1 × 202. It evaluated in AICRIP multi-location trials during wet seasons of 2020 to 2022. Consistently outperforming the check varieties Odisha, Gujarat, and Tamil Nadu, achieved a mean grain yield 4870 kg/ha. This superiority is evident with significant increase over national (20%), zonal (38%), local (28%). In addition, it exhibited moderate resistance leaf blast, neck sheath rot, brown spot,...
Abstract In rice ( Oryza sativa L.), during the course of domestication, numerous beneficial alleles remain untapped in progenitor wild species and landraces. This study aims at uncovering these promising six key genes influencing yield, such as DEP1 , Ghd7 Gn1a GS 3, qSW5 sd1 by targeted resequencing 200 genotypes. all, 543 nucleotide variations including single polymorphisms insertion deletion were identified from genes. Of them, 225 novel alleles, which present only 91 that showed...
Salinity is one of the major abiotic stresses that abate yield several crop species including rice. Several studies were conducted to identify quantitative trait loci (QTLs) for traits associated with salinity tolerance, mostly at seedling stage growth. However, reproductive development highly sensitive salt stress, and hence, better QTLs must be developed. have been identified in present study tolerance rice using recombinant inbred lines (RILs). Thirty-day-old seedlings 184 RILs derived...