1. Allopolyploid plants have a wide distribution in the nature.

2. Recent studies demonstrated that allopolyploid formation is often accompanied by genomic changes that cannot be readily explained by Mendelian genetic principles.

3. The properties of the hybrid, such as greater vigor and adaptability, are retained in the allopolyploid in subsequent generations and such organisms are often highly successful.

4. In plants this is sometimes overcome by the doubling of the chromosome number , giving an allopolyploid.

5. The above-mentioned results indicate that the formation of autopolyploid and allopolyploid may be related to the level of inbreeding depression.