ICAR AIEEA PG 2026 Chapter-Wise Weightage in Genetics and Plant Breeding

ICAR AIEEA PG 2026 Genetics and Plant Breeding paper draws from 13 key chapters, with Plant Breeding Methods carrying the highest share at 13–17% of questions based on previous year patterns.

ICAR AIEEA PG 2026, scheduled for July 1, 2026 and conducted by the National Testing Agency (NTA), tests Genetics and Plant Breeding students across a comprehensive syllabus. Understanding which chapters appear most frequently helps you allocate preparation time strategically and target maximum marks in the 150-question paper.

• Exam Date: July 1, 2026 (as per official schedule)
• Total Questions: 150 MCQs in the Genetics and Plant Breeding discipline paper
• Highest Weightage Chapter: Plant Breeding Methods (13–17% expected)
• Second Highest: Quantitative Genetics and Biometrical Genetics (10–12% expected)
• Mode: Computer-Based Test (CBT)

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Genetics and Plant Breeding Paper at a Glance

The Genetics and Plant Breeding discipline paper in ICAR AIEEA PG 2026 consists of 150 objective-type (MCQ) questions covering the full syllabus of classical genetics, molecular biology, quantitative genetics, plant breeding methods, biotechnology, and seed technology. The exam is conducted in CBT mode by NTA on behalf of ICAR.

The exam date is confirmed as July 1, 2026. Students who understand the approximate distribution of questions across chapters can focus on high-yield sections and maximise their scores within the available preparation time.

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Chapter-Wise Weightage in Genetics and Plant Breeding

The table below shows the approximate chapter-wise question distribution for the ICAR AIEEA PG Genetics and Plant Breeding paper. These figures are based on 2022–2025 question paper trends and are indicative of the expected 2026 distribution.

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High-Weightage Chapters: Genetics

The Genetics portion spans classical, molecular, cytological, and population genetics. Together, these chapters account for roughly 35–40% of the paper’s questions, making them indispensable to your preparation strategy.

Mendelian and Non-Mendelian Genetics

This chapter covers Mendel’s laws, monohybrid and dihybrid crosses, incomplete dominance, codominance, epistasis, pleiotropy, linkage, and crossing over. Expect 10–12 questions, many involving probability calculations. Ratios from different gene interaction types are a recurring subtopic in ICAR AIEEA PG papers.

Molecular Genetics and Gene Expression

DNA structure and replication models, transcription, translation, gene regulation (lac operon, trp operon), and post-transcriptional modifications are tested here. This chapter carries approximately 12–15 questions and combines conceptual understanding with factual recall. Gene regulation models appear repeatedly across previous years’ papers.

Cytogenetics and Chromosomal Genetics

Chromosome structure, mitosis and meiosis mechanics, sex determination systems, and chromosomal aberrations — deletions, duplications, inversions, translocations, and aneuploidy — are commonly tested. Cytogenetics contributes 8–10 questions and overlaps with polyploidy topics in the Plant Breeding section.

Population Genetics and Evolutionary Genetics

Hardy-Weinberg equilibrium and its mathematical applications, factors disturbing equilibrium (mutation, selection, migration, genetic drift, random mating), and molecular evolution are frequently asked. Population genetics accounts for 8–10 questions, many of which are calculation-based and reward regular numerical practice.

Recombinant DNA Technology and Biotechnology

Restriction enzymes, cloning vectors, PCR and its variants, CRISPR-Cas9, transformation techniques, marker-assisted selection (MAS), and molecular markers — SSR, RAPD, SNP, DArT — are major subtopics. This chapter contributes 10–12 questions and has seen growing importance in recent ICAR papers, particularly on MAS and genomic selection tools.

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High-Weightage Chapters: Plant Breeding

The Plant Breeding component carries the greatest overall share of the paper. Plant Breeding Methods alone accounts for 13–17% of total questions, making it the single most important chapter in the discipline paper.

Plant Breeding Methods

This chapter covers breeding methods for self-pollinated crops (pure line, pedigree, bulk, SSD, backcross), cross-pollinated crops (mass selection, recurrent selection, population improvement), and vegetatively propagated crops. Expect 20–25 questions from this chapter. Differences between methods, their advantages, and their application to specific crop types are examined most frequently.

Quantitative Genetics and Biometrical Genetics

Heritability in narrow and broad sense, genetic advance, selection differential, genotype-environment interaction, components of genetic variance (additive, dominance, epistatic), selection indices, and path coefficient analysis are key subtopics. This chapter contributes 15–18 questions and rewards students comfortable with numerical calculations. Heritability-based problems appear in almost every year’s paper based on past trends.

Heterosis and Hybrid Seed Production

Definitions and types of heterosis, dominance and overdominance hypotheses, cytoplasmic male sterility (CMS), genic male sterility (GMS), environmental genetic male sterility (EGMS), and hybrid seed production procedures are regularly tested. Approximately 8–10 questions come from this chapter, with CMS systems and their crop-specific applications being a high-frequency topic.

Seed Technology and Seed Certification

Seed classes (nucleus, breeder, foundation, certified, truthfully labelled), seed certification agencies, DUS testing criteria, Seed Act provisions, and seed quality parameters are covered. Seed Technology contributes 8–10 questions — a section many students underestimate that yields easy marks with focused revision.

Mutation Breeding and Polyploidy

Physical mutagens (X-rays, gamma rays, UV), chemical mutagens (EMS, colchicine), mutation breeding procedures, autopolyploidy, allopolyploidy, amphiploidy, and examples of polyploid crop species are tested. Combined, these two chapters contribute 11–15 questions. Colchicine-induced polyploidy and examples such as triticale, tetraploid cotton, and hexaploid wheat appear regularly in ICAR papers.

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How to Prioritise Chapters for ICAR AIEEA PG 2026

Matching study hours to chapter weightage is the most efficient approach for ICAR AIEEA PG 2026 Genetics and Plant Breeding preparation.

• Tier 1 — Highest Priority (Plant Breeding Methods and Quantitative Genetics): Together these contribute roughly 23–29% of the paper. Solve numerical problems daily and revise breeding methods for self- and cross-pollinated crops as separate categories.
• Tier 2 — High Priority (Molecular Genetics, Recombinant DNA Technology, Mendelian Genetics): These three chapters collectively account for 22–26% of questions. Focus on gene regulation models, MAS tools, and probability-based cross problems.
• Tier 3 — Moderate Priority (Cytogenetics, Population Genetics, Heterosis): Approximately 15–21% of the paper. Use ICAR AIEEA PG 2022–2025 previous papers to identify the most-repeated subtopics within each chapter.
• Tier 4 — Foundational (Seed Technology, Mutation Breeding, Polyploidy, Cell Biology): Around 15–20% of the paper. These chapters have defined factual content and offer high accuracy once covered in a focused single reading.

Practising 300–400 previous year ICAR AIEEA PG questions from 2020–2025 papers is the most effective way to calibrate chapter priorities and identify subtopics that recur across years.