Target enrichment phylogenomics and biogeographic analyses unravel rapid radiation and reticulate evolution between Hainan-South China mainland -Vietnam in SectionNintooa(Lonicera, Caprifoliaceae)

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 3, 2024

Abstract The South China mainland and nearby islands are biodiversity hotspots. Section Nintooa , widely distributed across China, Vietnam, Hainan Island, exhibits a typical disjunct distribution pattern. However, the origins of flora Island phylogenetic relationships within remain contentious. In this study, we collected 81 samples encompassing all recognized species along with from other sections Lonicera . We reconstructed using 491 orthologous nuclear genes complete plastomes generated by target enrichment genome skimming sequencing. Our gene-based concatenated trees support monophyly tree indicates that Vietnamese populations form sister clades. plastome results indicate is polyphyletic, subsection Volubilis forming monophyletic group Calcaratae clade members subgenus Chamaecerasus hybridization network analysis reveals extensive gene flow whereas shows no leaving origin unclear. exhibit unstable positions underwent rapid radiation during Miocene. Biogeographical Vietnam both originated China. Overall, our findings enhance understanding evolutionary diversification history

Language: Английский

Distinct ancient structural polymorphisms control heterodichogamy in walnuts and hickories

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 23, 2023

The maintenance of stable mating type polymorphisms is a classic example balancing selection, underlying the nearly ubiquitous 50/50 sex ratio in species with separate sexes. One lesser known but intriguing balanced polymorphism angiosperms heterodichogamy - for opposing directions dichogamy (temporal separation male and female function hermaphrodites) within flowering season. This system common throughout Juglandaceae, family that includes globally important iconic nut timber crops walnuts (

Language: Английский