The disadvantages of self-pollination are as follows :
- Continued self-pollination, generation after generation, may lead to the weakening of the variety of the species. The seeds produced through it are poor in quality and give rise to less vigorous offspring.
- The weaker or defective characters of the variety or breed cannot be eliminated
- It does not yield new varieties. The genetic traits of the same plant with no change and without any intermixing are passed on to the next generation. Thus there is little chance for improvement in the next generation.