Q.1
ICAR AIEEA PG 2024 - Horticulture (Q.62)
MCQ (Single Correct) +4 −1
English हिन्दी

Which of the following mechanisms favours self-pollination?

निम्नलिखित में से कौन-सा तंत्र स्व-परागण (self-pollination / autogamy) को बढ़ावा देता है?

EXPLANATION Tree Spices and Herbal Spices: Clove, Nutmeg, Cinnamon, Allspice and Vanilla
  • Correct Answer: Cleistogamy.
  • Cleistogamy refers to flowers that never open at all; pollination and fertilization take place inside the closed bud, ensuring $100\%$ obligate self-pollination (e.g., groundnut, barley, Commelina benghalensis underground flowers).
  • Mechanisms favoring cross-pollination (Allogamy):

  - Protandry: Anthers mature before stigma (e.g., onion, carrot).
  - Protogyny: Stigma matures before anthers (e.g., pearl millet, fig).
  - Dioecy: Staminate and pistillate flowers on separate plants (e.g., papaya, date palm, pointed gourd).

  • सही उत्तर: अनुन्मील्यता / क्लिस्टोगैमी (Cleistogamy)।
  • क्लिस्टोगैमी में पुष्प कभी नहीं खिलते हैं, जिससे बंद कली के अंदर ही परागण और निषेचन अनिवार्य रूप से संपन्न होता है (जैसे मूंगफली, जौ)।
  • पर-परागण को बढ़ावा देने वाले कारक: पुंपूर्वता (Protandry - प्याज), स्त्रीपूर्वता (Protogyny), और एकलिंगाश्रयता (Dioecy - पपीता, परवल)।
Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report
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Horticulture विषय एवं अध्याय

विषय एवं पाठ्यक्रम के अनुसार सभी अध्याय देखें

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Agronomy, Agro-Climatic Zones, Cropping Systems, Tillage and Soil Fertility Management Plant Physiology, Photosynthesis, Respiration, Transpiration, Mineral Nutrition and Growth Regulators Historical Milestones, Agricultural Education, ICAR Institutes and Research Infrastructure Extension Education Principles, Rural Development Programs (PKVY, PMKSY, SHC) and Transfer of Technology Cell Biology, Genetics, Cytogenetics and Molecular Biology Fundamentals Major Plant Diseases, Insect Pests, Weeds and Integrated Pest Management (IPM) Statistical Methods: Central Tendency, Dispersion, Probability, Hypothesis Testing and Experimental Field Designs Agricultural Economics, Farm Management, Marketing, Finance (KCC, NABARD) and Price Policy

फल विज्ञान, रोपण व मसाला फसलें, सब्जी विज्ञान, तुड़ाई उपरांत प्रबंधन, पुष्प विज्ञान व प्रजनन

36 टॉपिक्स
Temperate Nut Crops: Walnut, Almond, Pecan nut, Chestnut and Pistachio Cucurbitaceous Vegetable Crops: Cucumber, Melons (Watermelon, Muskmelon) and Gourds Tree Spices and Herbal Spices: Clove, Nutmeg, Cinnamon, Allspice and Vanilla सक्रिय Principles of Fruit Production: Classification, Agro-climatic Requirements, Orchard Planning and Planting Systems Orchard Management: Training and Pruning Systems, Canopy Management, Unfruitfulness, Alternate Bearing and Pollinizers Root and Tuber Vegetable Crops: Potato, Sweet Potato, Cassava, Carrot, Radish, Turnip and Beetroot Tropical Fruit Production: Mango, Banana, Papaya, Guava and Sapota Beverage and Stimulant Crops: Tea, Coffee, Cocoa and Rubber Plant Propagation and Nursery Management in Fruit Crops: Sexual and Asexual Methods, Grafting, Rootstocks Major Spices: Black Pepper, Small Cardamom, Large Cardamom, Ginger and Turmeric Major Plantation Crops: Coconut, Arecanut, Oil Palm, Palmyra Palm and Cashewnut Subtropical Fruit Production: Citrus Species, Grapes, Pomegranate, Litchi and Loquat Minor and Underutilized Fruit Crops: Passion Fruit, Mangosteen, Rambutan, Dragon Fruit, Karonda and Wood Apple Principles of Vegetable Production: Classification, Kitchen Gardening, Nursery Raising and Precision Farming Plant Breeding in Vegetable and Flower Crops: Heterosis, Male Sterility (CMS), Self-Incompatibility and Molecular Markers Physiological Disorders and Nutritional Deficiencies of Major Fruit Crops Solanaceous Vegetable Crops: Tomato, Brinjal (Eggplant), Chilli and Sweet Pepper (Capsicum) Cole Crops and Cruciferous Vegetables: Cabbage, Cauliflower, Knol Khol, Sprouting Broccoli and Brussels Sprouts Bulb and Allium Vegetables: Onion, Garlic, Leek and Shallot Landscape Architecture, Garden Styles (Formal, Informal, Mughal, Japanese, English) and Lawn Management Ornamental Plants: Trees, Shrubs, Climbers, Annuals, Foliage Plants, Cacti, Succulents, Palms and Bonsai Temperate Fruit Production: Pome Fruits (Apple, Pear, Quince) and Stone Fruits (Peach, Plum, Apricot, Cherry) Leguminous Vegetable Crops: Garden Pea, French Bean, Cowpea, Cluster Bean, Dolichos Bean and Winged Bean Arid and Semi-Arid Fruit Production: Aonla, Ber, Bael, Date Palm, Fig, Custard Apple, Jamun and Phalsa Commercial Loose Flowers: Marigold, Jasmine (Bela, Chameli, Mogra), Tuberose, Crossandra and China Aster Medicinal and Aromatic Plants: Senna, Isabgol, Ashwagandha, Opium Poppy, Mentha, Lemongrass and Essential Oils Leafy and Salad Vegetables: Spinach, Palak, Amaranthus, Fenugreek, Lettuce and Minor Greens Commercial Cut Flowers: Rose, Carnation, Chrysanthemum, Gladiolus, Gerbera, Orchid and Anthurium Perennial and Underutilized Vegetable Crops: Drumstick (Moringa), Pointed Gourd, Ivy Gourd and Asparagus Plant Breeding in Fruit and Plantation Crops: Floral Biology, Incompatibility, Apomixis, Polyploidy and Mutation Seed Spices and Condiments: Coriander, Cumin, Fennel, Fenugreek, Ajwain, Celery and Aniseed Post-Harvest Physiology: Respiration, Transpiration, Ethylene Biosynthesis and Action, Ripening and Senescence Value Added Products: Juices, Squashes, Jams, Jellies, Marmalades, Pickles, Chutneys, Preserves (Murabba) and Candy Protected Cultivation of Horticultural Crops: Greenhouses, Polyhouses, Net houses, Hydroponics and Vertical Farming Harvesting, Pre-cooling, Sorting, Grading, Packaging, Cold Storage, CA/MA Storage and Transportation Principles of Preservation and Processing: Drying, Dehydration, Thermal Processing, Freezing and Chemical Preservatives
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