Two new Dryopteris taxa originated from distantly related congeners in China

Abstract

Since the inception of genetic investigations into the origin of Dryopteris species belonging to D. subg. Erythrovariae in East Asia, around 20 taxa with hybrid ancestry have been identified. Among these species, some have arisen from distant interspecific hybridization events. In this study, we describe and illustrate two newly discovered hybrids from China: Dryopteris parabissetiana sp. nov., a triploid species, and D. ×tiantangzhaiensis nothosp. nov., a diploid hybrid within Dryopteridaceae. Morphologically, D. parabissetiana exhibits similarities to D. bissetiana but can be distinguished by its ovate scales, while D. ×tiantangzhaiensis clearly displays intermediate characteristics between D. gymnophylla and D. tsoongii. Phylogenetic analyses indicate that D. tsoongii serves as their maternal parent, while D. bissetiana and D. gymnophylla are their paternal parents, respectively. Furthermore, we propose a section‐level classification for such hybrids of mixed parental sections.

Dryopteris jinpingensis, a critically endangered diploid new species of Dryopteridaceae from Yunnan, China

“…material 1 , 3 ) ( Zuo et al 2022a , b ). The second matrix consisted of 50 nuclear AK1 sequences, two of which were newly obtained and the others from previous studies ( Hori et al 2021 ; Zuo et al 2022a , b ; Wei et al 2024 ). The two matrices were aligned and corrected using MAFFT v.7.017 ( Katoh et al 2002 ) and Geneious 9.1.4 ( Kearse et al 2012 ), respectively.…”