Given below are two statements: Statement (I): Phytoplasmas are...

All Subjects General Agriculture, Crop Production & Soils Cell Biology, Genetics, Physiology, Biochemistry & Plant Protection Genetics, Plant Pathology, Seed Science & Agricultural Microbiology Food & Industrial Microbiology, Rural Development

Q.56

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Assertion & Reason

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R):

Assertion (A) : False negative results will render the plant pathogen detection kit unusable.

Reason (R) : False negative results are due to poor sensitivity of the markers.

In light of the above statements, choose the correct answer from the options given below:

नीचे दो कथन दिए गए हैं, एक को अभिकथन (A) और दूसरे को कारण के रूप में लेबल किया गया है:

अभिकथन (A) : गलत नकारात्मक परिणाम पादप रोगजनक पहचान किट को अनुपयोगी बना देंगे।

कारण : गलत नकारात्मक परिणाम मार्करों की खराब संवेदनशीलता के कारण होते हैं।

उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

Both (A) and (R) are true and (R) is the correct explanation of (A) (A) और दोनों सही हैं और, (A) की सही व्याख्या है Both (A) and (R) are true but (R) is NOT the correct explanation of (A) (A) और दोनों सही हैं लेकिन, (A) की सही व्याख्या नहीं है (A) is true but (R) is false (A) सही है लेकिन गलत है (A) is false but (R) is true (A) गलत है लेकिन सही है

Diagnostic validity and analytical sensitivity:

In plant quarantine and disease certification, false negatives (failing to detect an infected sample) can allow catastrophic quarantine pathogens to slip through, rendering the kit unreliable and unusable: Assertion (A) is true.
False negatives predominantly arise when the analytical limit of detection (sensitivity) of the assay is too low to detect low titer pathogens or early-stage latent infections: Reason (R) is true and directly explains Assertion (A).

Therefore, Both (A) and (R) are true and (R) is the correct explanation of (A).

रोग निदान किट की संवेदनशीलता और विश्वसनीयता:

यदि कोई डायग्नोस्टिक किट संक्रमित पौधे को स्वस्थ (फॉल्स नेगेटिव) बता दे, तो रोग अन्य क्षेत्रों में फैल सकता है, जिससे किट पूर्णतः अनुपयोगी हो जाती है: अभिकथन (A) सही है।
जब मार्करों या परीक्षण की संवेदनशीलता कमजोर होती है, तो वे कम सांद्रता वाले रोगजनकों को नहीं पकड़ पाते, जिससे गलत नकारात्मक परिणाम आते हैं: कारण (R) सही है और (A) की सही व्याख्या करता है।

अतः (A) और (R) दोनों सही हैं और (R), (A) की सही व्याख्या है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Q.57

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Assertion & Reason

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R):

Assertion (A) : Host resistance is one of the best methods of plant disease management.

Reason (R) : New pathotypes can make the resistance non-durable.

In light of the above statements, choose the correct answer from the options given below:

अभिकथन (A) : पोषक प्रतिरोध पादप रोग प्रबंधन के सर्वोत्तम तरीकों में से एक है।

कारण : नए पैथोटाइप प्रतिरोध को गैर-टिकाऊ बना सकते हैं।

उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

Host plant resistance dynamics:

Genetic host plant resistance is environmentally benign, economically cost-effective, and safe, making it the ideal cornerstone of integrated plant disease management: Assertion (A) is true.
Selection pressure from monogenic vertical resistance frequently selects for virulent mutant races/pathotypes that overcome the resistance gene, causing boom-and-bust cycles: Reason (R) is true.
However, the breakdown of resistance by new pathotypes is a drawback/limitation, NOT the explanation for why host resistance is the best method.

Thus, Both (A) and (R) are true but (R) is NOT the correct explanation of (A).

पोषक पादप प्रतिरोध की विशेषताएं एवं चुनौतियां:

आनुवंशिक पोषक प्रतिरोध पर्यावरण के अनुकूल, सस्ता और प्रभावी होने के कारण रोग प्रबंधन की सर्वोत्तम विधि है: अभिकथन (A) सही है।
रोगजनक में नए उग्र प्रभेद (पैथोटाइप) विकसित होने से प्रतिरोध क्षमता टूट सकती है: कारण (R) सही है।
परंतु नए पैथोटाइप का उभरना इसकी एक सीमा है, न कि इसके सर्वोत्तम होने का कारण।

अतः (A) और (R) दोनों सही हैं लेकिन (R), (A) की सही व्याख्या नहीं है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Q.58

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Statement Based

Given below are two statements

Statement (I) : P. M. A. Millardet discovered a chemical method of plant disease management.

Statement (II) : Millardet was a student of Anton de Bary.

In light of the above statements, choose the most appropriate answer from the options given below:

नीचे दो कथन दिए गए हैं

कथन (I) : पी. एम. ए. मिलार्डेट ने पादप रोग प्रबंधन की एक रासायनिक विधि की खोज की थी।

कथन (II) : मिलार्डेट एंटोन डी बारी के छात्र थे।

उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सबसे उपयुक्त उत्तर चुनिए:

Both Statement (I) and Statement (II) are correct कथन (I) और कथन (II) दोनों सही हैं Both Statement (I) and Statement (II) are incorrect कथन (I) और कथन (II) दोनों गलत हैं Statement (I) is correct but Statement (II) is incorrect कथन (I) सही है लेकिन कथन (II) गलत है Statement (I) is incorrect but Statement (II) is correct कथन (I) गलत है लेकिन कथन (II) सही है

Q.59

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Statement Based

Given below are two statements

Statement (I) : Xa27 gene confers resistance to bacterial blight in rice.

Statement (II) : Xa27 is a receptor-like kinase type of receptor.

In light of the above statements, choose the most appropriate answer from the options given below:

नीचे दो कथन दिए गए हैं

कथन (I) : Xa27 जीन धान में जीवाणु झुलसा के प्रति प्रतिरोधकता प्रदान करता है।

कथन (II) : Xa27 एक रिसेप्टर-जैसे काइनेज प्रकार का रिसेप्टर है।

Both Statement (I) and Statement (II) are incorrect कथन (I) और कथन (II) दोनों गलत हैं Both Statement (I) and Statement (II) are correct कथन (I) और कथन (II) दोनों सही हैं Statement (I) is correct but Statement (II) is incorrect कथन (I) सही है लेकिन कथन (II) गलत है Statement (I) is incorrect but Statement (II) is correct कथन (I) गलत है लेकिन कथन (II) सही है

Q.60

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Statement Based

Given below are two statements

Statement (I) : Phytoplasmas are found in the phloem.

Statement (II) : Phytoplasmas are transmitted by beetles.

In light of the above statements, choose the most appropriate answer from the options given below:

नीचे दो कथन दिए गए हैं

कथन (I) : फाइटोप्लाज्मा फ्लोएम में पाए जाते हैं।

कथन (II) : फाइटोप्लाज्मा भृंगों द्वारा संचरित होते हैं।

General Agriculture, Crop Production & Soils

4 Topics

Historical Evolution, Agricultural Education and Research Infrastructure in India Agricultural Geography, Economic Botany and Major Crop Statistics Agro-Climatic Zones, Cropping Systems and Soil Fertility Management Agricultural Statistics, Biometrics and Field Experimental Designs

Cell Biology, Genetics, Physiology, Biochemistry & Plant Protection

16 Topics

Recombinant DNA Technology, Transgenic Crops, Gene Editing and PPV&FRA/IPR Modes of Reproduction, Pollination Mechanisms, Apomixis and Male Sterility Systems Structural and Numerical Chromosomal Aberrations Breeding Methods in Cross-Pollinated Crops: Population Improvement, Synthetics and Composites Heterosis, Inbreeding Depression, Combining Ability and Hybrid Seed Production Active Molecular Markers (SSR, SNP, DArT), QTL Mapping, MAS and Genomic Selection Mutation Breeding, Distant Hybridization and Chromosome Doubling Mendelian Principles, Gene Interaction and Probability Ratios Plant Genetic Resources, Germplasm Exploration, Conservation and Centers of Diversity Chromosome Ultrastructure, Karyotype Analysis and Specialized Chromosomes Breeding Methods in Self-Pollinated Crops: Pureline, Mass, Pedigree, Bulk and SSD Population Genetics, Hardy-Weinberg Equilibrium and Gene Frequency Dynamics Quantitative Genetics, Polygenic Inheritance, Heritability and Genetic Advance Ideotype Breeding, Abiotic Stress Breeding and Quality Breeding Linkage, Genetic Mapping, Recombination and Tetrad Analysis Molecular Cytogenetics, FISH, GISH and Epigenetics in Plant Breeding

Genetics, Plant Pathology, Seed Science & Agricultural Microbiology

11 Topics

Seed Production Principles: Nucleus, Breeder, Foundation and Certified Seed Classes Floral Biology, Embryogenesis, Seed Development and Seed Chemistry Seed Dormancy Mechanisms, Breaking Treatments and Germination Physiology Seed Testing Procedures: Sampling, Purity Analysis, Germination Test and TZ Viability Hybrid Seed Production Techniques: Detasseling, Isolation Distance and Field Rouging Seed Certification Standards, Field Inspections, Field Counts and Tag Colors Seed Village Concept, Seed Replacement Rate (SRR), Varietal Replacement and Seed Act 1966 Seed Storage Physiology, Controlled Storage, Recalcitrant Seed Handling and ISTA Rules Seed Deterioration, Aging Physiology, Harrington Thumb Rules and Seed Longevity Seed Processing: Air-Screen Cleaners, Specific Gravity Separators, Grading and Drying Seed Treatment, Film Coating, Pelletizing and Packaging

Food & Industrial Microbiology, Rural Development

10 Topics

General Plant Pathology: History, Koch's Postulates and Disease Triangle Fungal Plant Pathogens: Classification, Spore Morphology, Life Cycles and Etiology Host-Pathogen Interaction: Infection Process, Toxins, Enzymes and Defense Mechanisms Principles of Plant Disease Management: Physical, Chemical, Biological and Resistance Agricultural Microbiology: Biofertilizers, Composting and Biocontrol Agents Plant Bacteriology: Pathogenic Bacteria, Phytoplasmas, Spiroplasmas and Symptoms Major Crop Diseases: Cereals, Pulses, Oilseeds, Commercial and Horticultural Crops Plant Virology: Genome Nature, Transmission Vectors and Viral Diseases Plant Parasitic Nematodes: Morphology, Life Cycle and Major Nematode Diseases Plant Disease Epidemiology, Forecasting, Assessment and Economic Injury Levels

RPSC Agriculture Exams

5 Exams

Food Safety Officer Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

RSSB Agriculture Exams

1 Exam

RSSB Agriculture Supervisor

National & PG Entrances

4 Exams

ICAR AIEEA PG Active

CUET UG Rajasthan Agriculture Pre-PG ICAR JRF/SRF

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

Plant Sciences Subjects

General Agriculture, Crop Production & Soils

Cell Biology, Genetics, Physiology, Biochemistry & Plant Protection

Genetics, Plant Pathology, Seed Science & Agricultural Microbiology

Food & Industrial Microbiology, Rural Development

Previous Year Papers of Plant Sciences

ICAR AIEEA PG 2024 - Plant Sciences

ICAR AIEEA PG Plant Science 14 July 2023 Shift-1 Paper

ICAR AIEEA PG Plant Sciences 09 July 2023 (Shift 1) Paper

Choose Exam

RPSC Agriculture Exams

RSSB Agriculture Exams

National & PG Entrances