Subgenus Melanocrommyum is the second largest subgenus of Allium,with a wide distribution ranging from the Canary Islands to northwestern India.This study investigates the phylogeny,biogeographic patterns,and morpholo...Subgenus Melanocrommyum is the second largest subgenus of Allium,with a wide distribution ranging from the Canary Islands to northwestern India.This study investigates the phylogeny,biogeographic patterns,and morphological character evolution of the subgenus using 117 accessions representing 107taxa across the 19 currently recognized sections within Allium subgenus Melanocrommyum.Although the subgenus is monophyletic,significant incongruence exists between morphological and molecular data.Our plastome-based phylogenetic analysis identified five distinct lineages(A-E),corresponding to the geographic distributions of the species.However,plastome lineages(A-E)and ITS clusters(A-G)were incongruent.Biogeographic and molecular dating analyses suggest that Melanocrommyum evolved in association with tectonic uplift events in Central Asia during the Late Miocene or Oligocene.Our finding that Melanocrommyum plastomes have lost inf A and one copy rps19 gene indicate that the subgenus has undergone a relatively recent diversification.We also found that narrow leaves and fasciculate to semiglobose inflorescences may represent ancestral traits within the subgenus.This study provides new insights into the biogeographic history and trait evolution of Melanocrommyum,suggesting recent diversification influenced by tectonic events and climate change,while highlighting the complexity of molecular and morphological data integration.展开更多
基金supported by grants from the Second Tibetan Plateau Scientific Expedition and Research(STEP)program(2019QZKK0502)the state research project‘Taxonomic Revision of Polymorphic Plant Families of the Flora of Uzbekistan’(FZ20200929321)+3 种基金the State Programs for 2021-2025‘Grid mapping of the flora of Uzbekistan’and the‘Digital Nature.Development of a digital platform for the flora of Central Uzbekistan’,implemented by the Institute of Botany of the Academy of Sciences of the Republic of Uzbekistan for the period 2025-2029National Natural Science Foundation of China(32322006)the Key Projects of the Joint Fund of the National Natural Science Foundation of China(U23A20149)the R&D Program of Yunnan Province(202103AF140005).
文摘Subgenus Melanocrommyum is the second largest subgenus of Allium,with a wide distribution ranging from the Canary Islands to northwestern India.This study investigates the phylogeny,biogeographic patterns,and morphological character evolution of the subgenus using 117 accessions representing 107taxa across the 19 currently recognized sections within Allium subgenus Melanocrommyum.Although the subgenus is monophyletic,significant incongruence exists between morphological and molecular data.Our plastome-based phylogenetic analysis identified five distinct lineages(A-E),corresponding to the geographic distributions of the species.However,plastome lineages(A-E)and ITS clusters(A-G)were incongruent.Biogeographic and molecular dating analyses suggest that Melanocrommyum evolved in association with tectonic uplift events in Central Asia during the Late Miocene or Oligocene.Our finding that Melanocrommyum plastomes have lost inf A and one copy rps19 gene indicate that the subgenus has undergone a relatively recent diversification.We also found that narrow leaves and fasciculate to semiglobose inflorescences may represent ancestral traits within the subgenus.This study provides new insights into the biogeographic history and trait evolution of Melanocrommyum,suggesting recent diversification influenced by tectonic events and climate change,while highlighting the complexity of molecular and morphological data integration.
