Abstract: Amorphophallus species have been considered as an important cash crop in Southwest China for the wild usage of glucomannan in food and medicinal fields. Individuals of Amorphophallus yunnanensis, A. dunnii, and their hybrids were analyzed using SSR markers to determine their genetic diversity and relationship to help with the utilization of hybrid resources. The results showed that no significant differences in genetic indices between hybrids and parents. The highest number of alleles was found in A. yunnanensis and hybrids, while A. dunnii had the highest values in the Shannon index, observed, and expected heterozygosity, attributed to the high genetic diversity in wild parental species. Additionally, a unique genetic cluster formed with hybrids was identified using SSR markers, and the hybrids were found to be more closely related to A. yunnanensis than to A. dunnii. The maternal species, A. yunnanensis, may have a greater genetic impact on the hybrids. These findings provide new insights for future molecular associate breeding of Amorphophallus resources.

Key words: Amorphophallus yunnanensis, Amorphophallus dunnii, hybrid, SSR marker