| Title | Species and hybrids in the genus Diaphanosoma Fischer, 1850 (Crustacea: Branchiopoda: Cladocera) |
| Abstract | Cladocerans are well-studied planktonic crustaceans, especially those of the genus Daphnia in which interesting evolutionary questions have been addressed on speciation processes. The aim of the present study is to demonstrate that other genera of cladocerans show similar levels of cryptic diversity, intraspecific gene flow, and thus become useful model systems for comparison. In order to do so, we chose the genus Diaphanosoma, widespread in tropical and temperate areas. We started with a survey of species diversity in the genus Diaphanosoma in Asia using a morphological approach, then obtained sequences from a mitochondrial and a nuclear marker from multiple individuals of different species, performed tests on DNA taxonomy and molecular phylogenies, and assessed the role of hybridization in explaining the cases of mitonuclear discordance. The results are that cryptic diversity occurs in Diaphanosoma, and mitonuclear discordance was found in about 6% of the sequenced animals. Past hybridization is supported as the most likely explanation for the discordance: no evidence was found of first generation hybrids with heterozygous sequences. Our analysis on patterns of genetic diversity in Diaphanosoma supports similarities and differences with what is known in Daphnia. |
| Source | Molecular phylogenetics and evolution (Print) 118, pp. 369–378 |
| Keywords | COICryptic speciesHybridizationIncomplete lineage sortingITS2Mitonuclear discordance |
| Journal | Molecular phylogenetics and evolution (Print) |
| Editor | Academic Press,, Orlando, FL, Stati Uniti d'America |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.ympev.2017.10.016 |
| Authors | Liu, Ping; Xu, Lei; Xu, Lei; Xu, Shao Lin; Martínez, Alejandro; Chen, Hua; Cheng, Dan; Dumont, Henri J.; Dumont, Henri J.; Han, Bo Ping; Fontaneto, Diego |
| Text | 378291 2018 10.1016/j.ympev.2017.10.016 Scopus 2 s2.0 85032683868 COI Cryptic species Hybridization Incomplete lineage sorting ITS2 Mitonuclear discordance Species and hybrids in the genus Diaphanosoma Fischer, 1850 Crustacea Branchiopoda Cladocera Liu, Ping; Xu, Lei; Xu, Lei; Xu, Shao Lin; Martinez, Alejandro; Chen, Hua; Cheng, Dan; Dumont, Henri J.; Dumont, Henri J.; Han, Bo Ping; Fontaneto, Diego Jinan University; Chinese Academy of Fishery Sciences; Universiteit Gent; Consiglio Nazionale delle Ricerche Cladocerans are well studied planktonic crustaceans, especially those of the genus Daphnia in which interesting evolutionary questions have been addressed on speciation processes. The aim of the present study is to demonstrate that other genera of cladocerans show similar levels of cryptic diversity, intraspecific gene flow, and thus become useful model systems for comparison. In order to do so, we chose the genus Diaphanosoma, widespread in tropical and temperate areas. We started with a survey of species diversity in the genus Diaphanosoma in Asia using a morphological approach, then obtained sequences from a mitochondrial and a nuclear marker from multiple individuals of different species, performed tests on DNA taxonomy and molecular phylogenies, and assessed the role of hybridization in explaining the cases of mitonuclear discordance. The results are that cryptic diversity occurs in Diaphanosoma, and mitonuclear discordance was found in about 6% of the sequenced animals. Past hybridization is supported as the most likely explanation for the discordance no evidence was found of first generation hybrids with heterozygous sequences. Our analysis on patterns of genetic diversity in Diaphanosoma supports similarities and differences with what is known in Daphnia. 118 Published version http //www.sciencedirect.com/science/article/pii/S1055790317303056 ping 2018_MPE_Liu et al.pdf Articolo in rivista Academic Press, 1055 7903 Molecular phylogenetics and evolution Print Molecular phylogenetics and evolution Print Mol. phylogenet. evol. Print Molecular phylogenetics and evolution. Print alejandro.martinezgarcia MARTINEZ GARCIA ALEJANDRO diego.fontaneto FONTANETO DIEGO |
