Question:medium

Which is a very dwarfing rootstock of apple?

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M 27 rootstock is used for ultra-high-density planting systems in apple orchards.
Updated On: Feb 20, 2026
  • M 12
  • M 109
  • M 26
  • M 27
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The Correct Option is D

Solution and Explanation

Step 1: Function of Rootstocks.
Rootstocks are utilized in fruit cultivation, such as apples, to regulate tree vigor, size, yield, and environmental adaptability.
Dwarfing rootstocks decrease plant dimensions, facilitating orchard management and enhancing productivity.
Step 2: Apple Rootstock Categories.
- Moderately vigorous rootstocks: M 109, M 12.
- Moderately dwarfing rootstock: M 26.
- Highly dwarfing rootstock: M 27, yields the most diminutive trees, optimal for dense plantings.
Step 3: Evaluation of Alternatives.
- (1) M 12: Moderately vigorous, not dwarfing.
- (2) M 109: Vigorous variety, not dwarfing.
- (3) M 26: Moderately dwarfing, not the smallest.
- (4) M 27: Appropriate, highly dwarfing rootstock for apple.
Step 4: Determination.
Consequently, M 27 is identified as the highly dwarfing rootstock for apple.
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