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Disadvantages of cross pollination:

  1. Pollination may fail due to distance barrier.
  2. Flowers have to totally depend on the external agencies for pollination.
  3. More wastage of pollen.
  4. It may introduce some undesirable characters.

Reference: http://media-1.web.britannica.com/eb-media/88/95388-004-6E2508A9.jpg

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