Given below are two statements
Statement (I) : Vertical resistance is exploited in agriculture by pathologists and breeders for crop improvement.
Statement (II) : Vertical resistance is mostly monogenic in nature.
In light of the above statements, choose the most appropriate answer from the options given below:
नीचे दो कथन दिए गए हैं
कथन (I) : फसल सुधार के लिए रोगविज्ञानियों और प्रजनकों द्वारा कृषि में ऊर्ध्वाधर प्रतिरोध (Vertical resistance) का उपयोग किया जाता है।
कथन (II) : ऊर्ध्वाधर प्रतिरोध प्रकृति में अधिकांशतः एकलजीनी (monogenic) होता है।
उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सबसे उपयुक्त उत्तर चुनिए:
Vertical Resistance in Crop Improvement:
- Statement (I) is TRUE: Vertical (race-specific / qualitative) resistance confers near-complete immunity against specific pathotypes or physiological races of a pathogen. Plant breeders and pathologists widely introgress vertical resistance genes into high-yielding crop cultivars because of their striking, clean-cut phenotypic protection.
- Statement (II) is TRUE: Vertical resistance is predominantly controlled by one or a few major genes (monogenic or oligogenic inheritance) following classic Mendelian inheritance and conforms to Flor's gene-for-gene model.
Therefore, both Statement (I) and Statement (II) are true.
Correct Answer: Option 1.
विस्तृत व्याख्या:
Vertical Resistance in Crop Improvement (ऊर्ध्वाधर प्रतिरोध - Van der Plank, 1963):
- Statement (I) is TRUE: Vertical (race-specific / qualitative) resistance confers near-complete immunity against specific pathotypes or physiological races of a pathogen. Plant breeders and pathologists widely introgress vertical resistance genes into high-yielding crop cultivars because of their striking, clean-cut phenotypic protection.
- Statement (II) is TRUE: Vertical resistance is predominantly controlled by one or a few major genes (monogenic or oligogenic inheritance) following classic Mendelian inheritance and conforms to Flor's gene-for-gene model.
Therefore, both Statement (I) and Statement (II) are true.
Correct Answer: Option 1.
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