After chromosome doubling the allopolyploid have 2 homologous chromosomes for each chromosome present in the F1 hybrid, which is the same situation as in the diploid species is known as

After chromosome doubling the allopolyploid have 2 homologous chromosomes for each chromosome present in the F1 hybrid, which is the same situation as in the diploid species known as Amhidiploid.
It is a plant originating from hybridization between two species in which the chromosome number is the sum of the chromosome numbers of both parental species. It behaves as an independent species.
Amphidiploid is a plant having the sum of the chromosome numbers of two parental species, owing to the doubling of the chromosomes in a hybrid of two species.