Rumesh Ranjan

• Ph.D. (Genetics and Plant Breeding)
• Professor (Assistant) at Punjab Agricultural University

Nitrogen use efficiency (NUE) in wheat may significantly reduce the excessive use of N fertilizers. However, being a quantitative trait, understanding its genetic basis is required for efficient wheat breeding. The present study was carried out to dissect the complex trait through the mapping of quantitative trait locus (QTLs) related to NUE compon...

Waterlogging (WL) is an important abiotic stress, severely affecting plant growth and development, inhibiting root respiration and degradation of chlorophyll, senescence of leaves and chlorosis leading to substantial yield loss. These intensities of yield losses generally depend on the duration of WL and crop growth stages. Maize being a dry land c...

Maize holds significant economic importance as a cereal crop on a global scale. Among several abiotic stresses, waterlogging poses a substantial challenge in attainment of potential crop yield. To recognize inbred lines that exhibit resilience to waterlogging, it is crucial to gain insights into the fundamental mechanisms and effects of waterloggin...

Maize is a vital staple food crop that contributes significantly to global food security. However, it lacks some key vitamins (like vitamin A), minerals (including Fe, Zn, Mn, Se, and I), and essential amino acids (such as lysine and tryptophan). Biofortification is one of the most efficient, economical, and sustainable approach to improving micron...

Hybrid breeding program in maize is dependent on the availability of heterotic inbred lines for full exploitation of heterosis. Identification of heterotic patterns among inbred lines is prerequisite for obtaining high yielding superior hybrids. A total of 156 inbred lines were evaluated thoroughly, out of which, a set of 25 promising parental inbr...

Quantitative genetics and plant breeding are non-exclusive and these disciplines has been benefited from each other for the past 100 years. As a matter of fact, the majority of economically significant traits in crops and livestock species are quantitative in nature rather than qualitative. Several biometricians have made a significant contribution...

The decline in tropical maize productivity due to climatic vulnerability is a matter of serious concern as being a food and feed/fodder commodity, it is an important crop for the sustenance of human life. Genetic selections and development of water deficit stress (WDS) tolerant commercial varieties have potential to offset the impact of changing te...

Root system architecture (RSA), also known as root morphology, is critical in plant acquisition of soil resources, plant growth, and yield formation. Many QTLs associated with RSA or root traits in maize have been identified using several bi-parental populations, particularly in response to various environmental factors. In the present study, a met...

Genetic improvement for nitrogen use efficiency (NUE) can play a very crucial role in sustainable agriculture. Root traits have hardly been explored in major wheat breeding programs, more so in spring germplasm, largely because of the difficulty in their scoring. A total of 175 advanced/improved Indian spring wheat genotypes were screened for root...

A Genome-wide association (GWAS) study was conducted for phosphorous (P)-use responsive physiological traits in bread wheat at the seedling stage under contrasting P regimes. A panel of 158 diverse advanced breeding lines and released varieties, and a set of 10,800 filtered single nucleotide polymorphism (SNP) markers were used to study marker-trai...

To minimize unused nitrogen (N) fertilizer in the soil, improving the nitrogen use efficiency of the cropping system is of utmost importance. Plants mainly absorb N from the soil through roots. The study was, therefore, carried out to know the inheritance pattern of root traits responsible for N uptake. Extreme six spring wheat lines selected from...

Minimizing the footprints of overuse of nitrogen (N) on the ecosystem is the need of an hour. There is little information on the genetic inheritance of NUE and its component traits. The present study was therefore designed to study the genetic behaviour of NUE traits under abundant N supply. Diallel analysis of 21 F1 along with 7 parents was carrie...

Mostly in the agriculture sector, identifying rotten fruits has been critical. The classification of fresh and rotting fruits is typically carried out by humans, which is ineffective for fruit growers. Humans wear out by doing the same role many days, but robots do not. As a result, the study proposed a method for reducing human effort, lowering pr...

Breeding wheat for improved root traits and suitability under conservation agriculture (CA) practices has the potential to boost and sustain grain yield in different parts of the world. Difficulties in scoring for root phenes under field conditions, considered a major hurdle to breed for root traits, can be surmounted by scoring under hydroponic co...

To address the environmental concerns and increases the total factor productivity to the farmers simultaneously, forces the breeders to develop the genotypes adapted to low input agriculture especially, low nitrogen (N) management practices. However, inadequate knowledge about the genetics of plant response to the low nutrient regime is complicatin...

Soybean seed loses viability rapidly during ambient storage in tropical and sub-tropical climate. Understanding genetic mechanisms would enable enhancing storage life of seeds through breeding approach. In this study, attempt was made to identify quantitative trait loci (QTL) controlling viability of seeds using an inter-specific recombinant inbred...

Nitrogen uptake being part of nitrogen use efficiency (NUE) is largely decided by root traits. Root traits variability has hardly been explored by breeders mainly because of difficulties in scoring. The hydroponic system requiring lesser space for precise phenotyping of large numbers of genotypes independently of the growing season can be a suitabl...

Increased application of inorganic nitrogen has been the key component responsible for growth in cereal production. Due to continuously increasing application of Nitrogen (N) and its lower use efficiency along with environmental and health implications of leftover N, improving nitrogen use efficiency (NUE) through management and genetic manipulatio...

The experiment was laid out in split plot design: three establishment methods were designed (Puddled transplanted rice, Non- puddled transplanted rice, Conventional dry tillage +DSR) as a main plot and four levels of nitrogen rate (0, 60, 120, 180) as sub plot and replicated three times during summer season of 2015 and 2016 at RARS, Parwanipur....

A subset of 19 genotypes was formulated on the basis of mean values for various traits related to nitrogen use efficiency from 175 genotypes comprising advance breeding lines and released Indian wheat (Triticum aestivum L.) cultivars observed under hydroponic condition. This subset was further evaluated in the pipe under nitrogen limiting environme...

A subset of 19 genotypes was formulated on the basis of mean values for various traits related to nitrogen use efficiency from 175 genotypes comprising advance breeding lines and released Indian wheat (Triticum aestivum L.) cultivars observed under hydroponic condition. This subset was further evaluated in the pipe under nitrogen limiting environme...

A subset of 19 genotypes was formulated on the basis of mean values for various traits related to nitrogen use efficiency from 175 genotypes comprising advance breeding lines and released Indian wheat (Triticum aestivum L.) cultivars observed under hydroponic condition. This subset was further evaluated in the pipe under nitrogen limiting environme...

Environmental and health concerns along with profitability issues may force breeders to pursue improving nitrogen use efficiency (NUE) in the coming years in India too. Root; the most vital organ for absorption of water and nutrient from the soil and its relation to nitrogen use is little understood and studied by researcher in Indian wheat germpla...

Root traits and nitrogen use efficiency at varied N levels in wheat

Increase in ambient temperature beyond threshold level as predicted by global climate models may impact wheat production severely in India if it happens during grain filling stage. Grain filling rate (GFR) and grain filling duration (GFD) are critical determinant for final grain yield realization in wheat. GFR in wheat follow a slow-fast-slow patte...

On the basis of D 2 values, 60 genotypes were grouped into 8 clusters containing 1 to 14 genotypes. These clusters consisted of genotypes with different geographical origins and indicated no correlation between genetic divergence and geographical divergence. The genotypes of cluster VIII showed maximum genetic divergence with cluster I and V. The g...

ABSTARCT: Sixty Gossypium arboreum L. genotypes were studied to observe genetic variability, heritability and genetic advance for seed cotton yield and its contributing characters. The analysis of variance revealed that the sufficient variability was present in the material for all the characters. The value of phenotypic coefficient of variation (P...

Sixty genotypes of Gossypium arboreum were evaluated to study the characters association and path effects. The correlation studies revealed that days to first flower, plant height, bolls/plant, monopods, boll weight and seed index showed significant and positive correlation with seed cotton yield/plant. The associations of bolls/plant and boll weig...

The present investigation was carried out at Research Farm of the Department of Vegetable Science, CCS Haryana Agriculture University, Hisar during spring-summer season of the year 2011. Based on D 2 values, forty six genotypes were grouped into eight clusters containing two to fifteen genotypes. These clusters consisted of genotypes with different...