Resolving relationships in the radiation of Australia's largest pea clade (Fabaceae tribe Mirbelieae) with target-capture sequencing.
作者信息
Clugston James A R, Barrett Russell L, Murphy Daniel J, Renner Matthew A M, Weston Peter H, Cook Lyn G, Jobson Peter C, Lepschi Brendan J, Crisp Michael D
机构信息
National Herbarium of New South Wales, Australian Botanic Garden, Mount Annan, NSW 2567, Australia.
Montgomery Botanical Center, Coral Gables, FL 33156-4242, USA.
出版信息
Ann Bot. 2025 Sep 23;136(3):637-649. doi: 10.1093/aob/mcaf128.
BACKGROUND AND AIMS
Tribe Mirbelieae (Fabaceae) represents one of the great species radiations in Australian flora and the largest in the pea-flowered legumes. Traditional amplicon sequencing has failed to resolve relationships within this species-rich and morphologically diverse tribe.
METHODS
Target-capture sequencing was used to reconstruct relationships within the core Mirbelioid legumes, which represent a previously hypothesized rapid radiation that dates to the Oligocene and early Miocene epochs.
KEY RESULTS
We recovered strongly supported deep nodes resolving relationships between all recognized genera and four novel clades based on 289 low-copy nuclear markers derived from the Angiosperms353 universal probe set. The taxonomically challenging genus Pultenaea was demonstrated to be polyphyletic. Minor changes are required in Aotus, Callistachys, Mirbelia, Oxylobium, Phyllota and Urodon.
CONCLUSIONS
Phylogenomic data have robustly resolved relationships in a large legume clade where relationships were long feared irresolvable. This resolution enables the recognition of monophyletic genera within the tribe, with only minimal taxonomic rearrangements. Critically, a new circumscription of Pultenaea supported by both phylogenomic and morphological data has now been achieved.
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