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I. Sudhir Kumar

Publications (12)

Dus Characterization in Maize (Zea mays L.) Inbred Lines

I. Sudhir Kumar, P. Kireeti Varma, G. Prasanthi, V. Sujatha & M. Ramabhadra Raju · Journal of Advances in Biology & Biotechnology · 2025

A field investigation was conducted during Rabi 2024–25 at the Agricultural Research Station, Peddapuram, Andhra Pradesh, to characterize 70 maize inbred lines based on Distinctness, Uniformity, and Stability (DUS) traits. The experiment was laid out in an Alpha Lattice Design wi...

Open access Research Article 10.9734/jabb/2025/v28i103152

Heterotic Classification of Inbred Lines of Maize Based on Combining Ability for Kernel Yield

I. Sudhir Kumar, Kumar, I. Sudhir, D. Keerthana, V. Sujatha & P. Bharat Chandra · International Journal of Environment and Climate Change · 2023

Grouping of maize inbred lines into heterotic groups is an initial step in exploitation of heterosis. Hence a field study was conducted to classify 27 inbred lines into two heterotic groups by evaluating the performance of 54 crosses along with lines and testers in a simple latti...

Open access Research Article 10.9734/ijecc/2023/v13i41732

Growth, Yield and Profitability of Baby Corn (Zea mays L.) Hybrids as Influenced by Planting Density and Fertility Levels

V. Sujatha, I. Sudhir Kumar & M. Ramabhadra Raju · Journal of Experimental Agriculture International · 2026

Background: Baby corn is a short-duration, high-value maize crop that provides nutritious cobs and valuable green fodder. Its productivity and profitability depend on appropriate planting density, nutrient management and hybrid selection under specific agro-climatic conditions. A...

Open access Research Article 10.9734/jeai/2026/v48i84426

Molecular Characterization of Genetic Diversity and Trait Association Analysis for Yield Improvement in Maize (Zea mays L.) Using SSR Markers

B. Vishnunanda Reddy, I. Sudhir Kumar, P. Shanthi, G. Prashanthi & S. K. Nafeez Umar · Journal of Advances in Biology & Biotechnology · 2026

A total of 11 maize inbred lines were crossed with 4 testers in a line × tester mating design (Kempthorne, 1957), generating 44 F₁ test crosses. These, along with 11 lines, 4 testers, and 5 checks (64 genotypes), were evaluated in a simple lattice design with two replications dur...

Open access Research Article 10.9734/jabb/2026/v29i53915

Optimizing Plant Density and Fertility for Medium Duration Maize Hybrids in Andhra Pradesh, India

V. Sujatha, I. Sudhir Kumar & B. Sravani · Asian Journal of Soil Science and Plant Nutrition · 2025

Aims: To evaluate the effect of planting density and fertility levels on the growth, yield and economics of medium-duration maize (Zea mays L.) hybrids during kharif season in Andhra Pradesh, and to identify the most productive and profitable hybrid–management combination. Study...

Open access Research Article 10.9734/ajsspn/2025/v11i4621

Yield and Economic Performance of Finger Millet Genotypes under Varying NPK Fertilizer Doses in Rainfed Conditions

V. Sujatha & I. Sudhir Kumar · Asian Journal of Soil Science and Plant Nutrition · 2025

Aims: To evaluate the influence of graded NPK fertilizer levels on the growth, yield and profitability of finger millet (Eleusine coracana L. Gaertn.) genotypes under rainfed conditions, and to identify the most productive and economically viable genotype–fertilizer combination....

Open access Research Article 10.9734/ajsspn/2025/v11i4617

Combining Ability and Heterosis Analysis in Maize: Insights from Line × Tester Hybridization

Talatam Ramya Vardhini, I. Sudhir Kumar & A. Prasanna Rajesh · Journal of Advances in Biology & Biotechnology · 2024

Fifty hybrids were obtained by crossing twenty five lines with two testers and were evaluated to study heterosis and combining ability for kernel yield per plant and its components traits. The experiment was laid out in simple lattice design with two replications during kharif 20...

Open access Research Article 10.9734/jabb/2024/v27i101573

Combining Ability Analysis for Grain Yield and Its Contributing Traits in Maize (Zea mays L.)

T. Jeevan Kumar, P. Venkata Ramana Rao, I. Sudhir Kumar & M. Ramabhadra Raju · Journal of Advances in Biology & Biotechnology · 2026

The present investigation was carried out at Agricultural Research Station Peddapuram during the Rabi season of 2025–2026 to evaluate combining ability, genetic variance components and progeny contributions for grain yield and 12 yield-attributing traits in maize (Zea mays L.). T...

Open access Research Article 10.9734/jabb/2026/v29i104475

Studies on Combining Ability for Grain Yield and its Attributing Traits in Maize (Zea mays L.)

T. Balaji Goud, B. Santhosh Kumar Naik, I. Sudhir Kumar, G. Mohan Naidu & M. Reddi Sekhar · Journal of Advances in Biology & Biotechnology · 2025

Developing a hybrid with high vigour and productivity requires the careful selection and crossing of parent lines that show a favourable combining ability to harness the potential of heterosis fully. Combining ability gives insights into the potential of inbred lines that can be...

Open access Research Article 10.9734/jabb/2025/v28i92926

Field Screening of Maize (Zea mays L.) Genotypes against Turcicum Leaf Blight (TLB) under Artificial Conditions

D. Keerthana, T. Haritha, I. Sudhir Kumar & D. Ramesh · International Journal of Plant & Soil Science · 2023

Background: There are a variety of critical problems facing tropical maize cultivation, such as disease infestation, insect/pest and weed problems. Foliar diseases in particular cause significant losses in agricultural yield. Leaf blight, known as northern leaf blight, is a disea...

Open access Research Article 10.9734/ijpss/2023/v35i72856

Character Association Studies for Kernel Yield and Its Attributing Traits in Maize

D. Keerthana, T. Haritha, I. Sudhir Kumar & D. Ramesh · International Journal of Environment and Climate Change · 2022

Correlation coefficient measures the strength of the relationship between independent traits on the dependent trait like yield, that helps breeder in selection for yield enhancement. In this view, the present experiment was carried out to assess the correlation coefficient and pa...

Open access Research Article 10.9734/ijecc/2022/v12i111383

Identification of Heat-Tolerant Rice Genotypes through Phenotypic Selection and Multi-Trait Characterization for Genetic Diversity

S. Ravi Teja, P. Venkata Ramana Rao, N. Veronica & I. Sudhir Kumar · International Journal of Plant & Soil Science · 2026

Rice (Oryza sativa L.) is highly vulnerable to elevated temperature, particularly during reproductive development, when impaired spikelet fertility and grain filling can substantially reduce yield. This study evaluated heat-stress responses among 49 rice genotypes, including rele...

Open access Research Article 10.9734/ijpss/2026/v38i76156