Nitiprasad Namdeorao Jambhulkar

• Central Rice Research Institute

Rice crop is often attacked by several insect pests during its growth stages. Brown planthopper, BPH, is the most serious pest of rice which can cause epidemic losses. Though deployment of durable resistant variety is the safest and economic method of management, the breakdown of resistance is commonly being observed in several cases forcing farmer...

Maharashtra state contributes 3.4% of rice area and 2.65% production of the country. Considering its importance in national rice basket, this study was undertaken to examine the growth rate and instability in area, production and yield of rice in Maharashtra state. The district wise data of rice have been collected from Directorate of Economics and...

West Bengal is the largest rice-producing state in the country. It contributes significantly to the national production pool and is one of the important rice consuming state. It is essential to study the growth pattern of rice production in the state. The district wise information of growth rate and instability is not available. Also the associatio...

Rice is one of the most important crops of South Asian countries especially in India, China, and Bangladesh in which rice is consumed in larger quantity than other cereals as well as other food items. With increase in population though total consumption of rice had increased, per capita consumption had shown a decreased trend in recent years due to...

The present study aims at estimating the impact of mini-mum support price (MSP) on rice cultivation using a quasi-experiment-based robust research design, pro-pensity score matching applied to household survey-based disaggregated primary data. Results indicate that MSP significantly impacts price realization in the disposal of paddy. Further, MSP h...

The role of biochar in improving the soil properties of problem soils is well known, but its long term impact on lowland rice soil is not well recognized. The soil quality indicators of biochar applied lowland rice soil are not widely reported. We developed soil quality index (SQI) of a biochar applied lowland rice soil based on 17 soil properties...

The present article discusses a technology transfer model, conceived at the ICAR-NRRI, Cuttack – INSPIRE (INnovative SPread In Rice Ecosystem). The model is based on the philosophy of bringing synergy through partnership and convergence. Farmers field demonstrations, knowledge empowerment, skill building, robust monitoring, distribution of critical...

The evaluation of crop research institutes in the developing world under limited data availability has not been assessed in the past due to resource constraints. The paper assesses the social benefits of rice research taking the case of a research institute from India following a new approach. The area coverage of the varieties was estimated to be...

The study presents a profile of rice in India and classifies different rice producing states based on productivity into high, medium and low yielding states. State wise area, production and yield (APY) data for the year 2018-19 indicates the typical concentration of rice cultivation in the eastern and southern Indian states but lowest yield in east...

The present research was conducted to study the stability analysis and comparison between different stability measures from AMMI model in nine rice genotypes. The experiment was conducted in rabi/dry season during 2010-11 in randomized complete block design with three replications at experimental farm of NRRI research station. Eleven stability meas...

Introgression lines of wide cross derivatives were screened to identify resistant/tolerant entries for WBPH biotypes under artificial condition. The main objective of this study is to provide breeders with more ‘attractive’ plant genetic resources that are easier to use, i.e. resistance sources in acceptable genetic background; or inbreeding tolera...

Climate change has affected the goal of poverty alleviation in the country in many ways. The adaptation and mitigation strategies against climate change, adopted so far in the country have taken various forms; grounded both in formalized institutional innovations, informal local wisdom, and community level collective actions. Government initiatives...

Climate change is a global menace that has caused huge economic losses to the countries. It has brought widespread misery to the farmers. Climate-resilient agriculture (CRA) is an inclusive approach of sustainably using natural resources by means of eco-friendly and nature positive crop and livestock production systems in order to achieve higher pr...

Seventy genotypes of rice were evaluated under three seasons. Additive main effects and multiplicative interaction (AMMI) model was applied to ascertain extent of genotype ´ into season interaction (GSI) and also the stability of rice genotypes over three seasons. Significant difference was observed by AMMI analysis among the 70 genotypes as well a...

Policy-makers, research managers, and donors are interested in knowing the outputs, outcomes, and impacts of investment in agricultural research. Several institutions are engaged in rice research and impact assessment of rice research requires area coverage information for rice varieties. The area coverage information for individual varieties is no...

Pre-breeding includes basic research to achieve wide crosses and facilitate the use of exotic materials or wild relatives for both qualitative and quantitative traits. The main objective is to provide breeders with more ‘attractive’ PGR that are easier to use, i.e. resistance sources in acceptable genetic background; or inbreeding tolerant forms of...

Ten pigmented and non-pigmented rice genotypes were evaluated to estimate the genetic parameters, heritability and association of twenty seven physical, physiological and biochemical traits related to seed quality. The results revealed the existence of wider genotypic variation with high heritability combined and high genetic advance for bulk densi...

The population of Andaman padauk (Pterocarpus dalbergioides Roxb.), an endemic ornamental timber species, is fast depleting in the Andaman Islands. Afforestation through seedlings is hindered by low germination and high mortality rates. This study attempts to assess the efficacy of clonal propagation methods to hasten mass multiplication by trying...

A study was conducted to examine the interrelationships among socioeconomic factors, household consumption patterns, calorie intake and greenhouse gas emissions factors in rural eastern India based on household survey data. Findings indicated that higher monthly per capita incomes (12.1–80.1$) were associated with greater average calorie intakes (2...

ICAR-National Rice Research Institute (NRRI), Cuttack, India had taken up two tiny villages namely Gurujanga & Guali in Odisha state for developing as model villages and dissemination of improved rice production technologies. Adoption of few land mark rice varieties developed by ICAR-NRRI, Cuttack resulted huge yield advantage over varieties grown...

Maximum and minimum temperatures play an important role in determining yield of rice crop. Yield anomaly of rice under different nutrient management practices was analyzed in a long-term rice–rice system with respect to maximum and minimum temperatures. The treatments included applications of inorganic sources of nutrients (NPK), organic sources of...

Agricultural growth with stability has been a matter of concern in Odisha. As rice is the major crop growing in the state, the present study was therefore carried out with the objectives to work out the district wise growth rate of area, production and yield of rice and to estimate district wise instability in area, production and yield of rice in...

Sustainable rice production is the key to achieving Sustainable Development Goals (SDGs), particularly for country like India. Growing rice in non-conventional and unsuitable ecoregions, however, has generated several environmental problems such as depletion of ground water, pollution of air, degradation of soil and aggravation of climate change. A...

Rice is a major cereal crop and staple food of eastern India, and most farmers depend solely on rice for their livelihood. Rice farming provides both tangible and non-tangible benefits to ecosystems which need to be maintained and enhanced. These benefits are provided through ecosystem services (ES) that include both marketable and non-marketable....

Grain discolouration is an emerging disease of rice that has potential to cause huge losses if favourable conditions are available. The disease is caused by a pathogen complex and was reported from few places of India. During rabi season in 2019, a survey was undertaken at the paddy fields of NRRI, Cuttack, and found heavy incidences of grain disco...

The ICAR-National Rice Research Institute (NRRI), Cuttack in Odisha develops varieties and agro-technologies for enhancing and sustaining rice production. The Institute so far has released 133 high-yielding varieties of rice for various ecosystems. Some of the varieties have been very popular among the farmers and even became ruling varieties in so...

Main conclusion Illumina-Miseq®-based cyanobiont diversity and biomass were analyzed in six Azolla spp. Results revealed that 93–98% of total operational taxonomic units (OTUs) belong to Nostacaceae followed by Cylindrospermopsis with about 1–6% OTUs. The taxonomy of Azolla-cyanobiont is a long-term debate within the scientific community. Morpholog...

Weedy rice species exhibit differential competitive ability and cause significant losses to rice yield. The present study was conducted to evaluate the competing ability of weedy rice accessions collected from foothills of eastern Himalayas and coastal Odisha grown in the presence of cultivated indica rice var. Swarna. The competitive ability of Sw...

Combined application of biocontrol agents (BCAs) have been used to exploit their synergistic potential. But the analysis of additive, synergistic and antagonistic effects of BCAs has rarely been explored for the biocontrol of plant diseases. This study was conducted to evaluate in vitro and in vivo biocontrol potential of the combined application o...

The dynamic and transitional characteristics of rice field ecosystems provide an excellent environment for integration with compatible components such as fish and duck, which enhances the overall productivity through the effective nutrient recycling. The ecological mechanisms underlying the rice-fish-duck system sustainability have not been studied...

The paper evaluates the growth experience of production and profitability in rice using secondary data for the period 1970-71 to 2015-16. The decadal growth in area, production and yield of rice in India and for different states were computed and compared for the above period. It was found that area growth in most of the states have either exhauste...

Weed management in rice depends on establishment method and proper selection of herbicide. A field experiment was conducted during dry seasons of 2013 and 2014 to develop a robust strategy for effective weed management in aerobic rice system for tropical rice belts. The efficacy of post-emergent herbicides bispyribac-sodium, azimsulfuron and flucet...

Extensive use of imidacloprid in rice ecosystem may alter dynamics of microorganisms and can change soil biochemical properties. The objective of this study was to assess the effect of imidacloprid on growth and activities of microbes in tropical rice soil ecosystem. Four treatments, namely, recommended dose (at 25 g a.i. ha⁻¹, RD), double the reco...

Four maize hybrids and their parental lines were used to find genetic purity through testing with four isoenzymes such as alcohol dehydrogenase (ADH), esterase (EST), acid phosphatase (ACP) and malate dehydrogenase (MDH) and evaluated with thirty pairs of simple sequence repeat (SSR) markers. Out of the four isoenzymes, only malate dehydrogenase co...

A pot experiment was conducted in the phytotron of Indian Agricultural Research Institute, New Delhi (India) to investigate the effects of four rhizobacterial strains viz.,UKA-24 (Rhizobium radiobacter), UKA-27 (Bacillus pumillus), UKA-72 (Stenotrophomonas maltophila)and AKA-1(Pseudomonas putida) on the growth promotion of basmati rice cultivar Pus...

Early blight of tomato caused by Alternaria solani, is responsible for severe yield losses in tomato. The conidia survive on soil surface and old dry lower leaves of the plant and spread when suitable climatic conditions are available. Macroclimatic study reveals that highest inoculum concentration of Alternaria spores appeared in May 2012 to 2013...

A large number of short grain aromatic rice suited to the agro-climatic conditions and local preferences are grown in niche areas of different parts of India and their diversity is evolved over centuries as a result of selection by traditional farmers. Systematic characterization of these specialty rices has not been attempted. An effort was made t...

Distribution of agronomic and grain quality traits in short grain aromatic rice genotypes collected from 19 districts. (TIF)

List of primers used in this study. (DOCX)

The frequency distribution of different haplotypes. (DOCX)

List of short grain aromatic rice landraces used in the present study and region of their collection. (DOCX)

Detailed agro-morphological and grain quality parameters of short grain aromatic rices. (DOCX)

Pair-wise Nei?s unbiased genetic distance of short grain aromatic rices based on SSR markers of 19 geographical districts. (DOCX)

Background Speciality rice, in general, and aromatic rice in particular, possess enormous market potential for enhancing farm profits. However, systematic characterization of the diversity present in this natural wealth is a major pre requisite for using it in the breeding programs. This study reports qualitative phenotypic trait based characteriza...

In this paper an attempt has been made to quantify and test whether rice cultivation in adjoining areas of mangrove forest by cutting forest tress has brought about significant changes in physicochemical, microbial and enzymatic properties of soils of the mangrove ecosystem. We collected 48 soil samples (24 pairs). We collected paired soil samples...

Impact of elevated CO2 on chlorpyriphos degradation, microbial biomass carbon, and enzymatic activities in rice soil was investigated. Rice (variety Naveen, Indica type) was grown under four conditions, namely, chambered control, elevated CO2 (550 ppm), elevated CO2 (700 ppm) in open-top chambers and open field. Chlorpyriphos was sprayed at 500 g a...

Rice production in the upland ecology is severely impeded due to low phosphorus (P) acquisition from soil and chemical P fertilizers fixing in soil soon after application. Arbuscular mycorrhizal (AM) technology appears to be a useful option to address this constraint. On-farm developed soil-root based mass-inoculum (MI) produced by multiplying nucl...

Eighteen rainfed upland breeding lines were evaluated under four environments in randomized complete block design with three replications. Data on grain yield were subjected to combined ANOVA and AMMI analysis. The AMMI model was applied, with additive effects for the 18 breeding lines of rice genotypes (G) and four seasons of testing (Environments...

Genotype (G) x Environment (E) interaction of 12 rice genotypes tested over six environments under direct seeded during optimal transplanting time for rice i.e. 15th January and 15th July of each year in dry and wet season respectively. The genotypes were grown in a randomized complete block design with three replications. The objective of this exp...

Genotype × Environment interaction of 17 early duration rice genotypes tested over four seasons was analyzed to identify stable high yielding genotypes. Genotypes were grown in a randomized complete block design with three replications. Genotype × environment interaction (GEI) was analyzed following Additive Main effects and Multiplicative Interact...

Rice (Oryza sativa L.) is one of the most important cereal crops in the world. India is one of the largest rice-producing countries. Although more than 900 rice varieties have been released in India, many of them are no longer cultivated within a few years of release due to inconsistent performance in diverse environments; only a few varieties with...

ABSTRACT Aim: To evaluate and identify the most suitable parameter for easy and quick recognisation of rice genotypes possessing partial resistance to rice blast disease. Experimental Design: The tested varieties were grown in one meter long single-row plots surrounded by the blast susceptible spreader rows of Karuna, with a spacing of 10 x 5 cm in...

A study was undertaken to find out the genetic variability and correlation between yield and other yield attributing characters of rice genotypes in upland ecology. The experiment was conducted with twenty two upland genotypes grown during Wet season under direct seeded condition in a randomized block design. Analysis of variance shows significance...

Genotype (G) x Environment (E) interaction of nine rice genotypes possessing cold tolerance at seedling stage tested over four environments was analyzed to identify stable high yielding genotypes suitable for boro environments. The genotypes were grown in a randomized complete block design with three replications. The genotype x environment (GxE) i...

Field experiments were conducted with twelve rice genotypes in a randomized complete block design with three replications under direct seeded and transplanted condition (irrigated and rainfed) for 3 consecutive years (2009 - 2012). Objective of the experiment was to identify stable rice genotypes with high grain yield. Analysis has been done using...

Irregular two-level fractional factorial designs are the plans that can not be specified in terms of defining contrasts. The aliasing properties of irregular fractional factorial plans can be explained by using minimum moment aberration and moment aberration projection criterion. In this paper a method of construction for irregular minimum aberrati...

Genotype x environment interaction (GEI) of 42 rice genotypes tested over nine seasons was analyzed to identify stable resistance to blast disease incited by Magnaporthe oryzae. The genotypes were raised in uniform blast nursery in a randomized complete block design with three replications. The GEI was analyzed following the regression models as we...