Plastome evolution and organisation in the Hoya group (Apocynaceae)

Abstract The genus Hoya is highly diverse and many of its species are popular ornamental plants. However, the relationships between Hoya and related genera (the Hoya group) are not fully resolved. In this study, we report 20 newly sequenced plastomes of species in the Hoya group. The complete plasto...

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Autores principales:	Michele Rodda, Matti A. Niissalo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/988d5552ea9a4e1cbca72fdbb45c8a1d
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spelling	oai:doaj.org-article:988d5552ea9a4e1cbca72fdbb45c8a1d2021-12-02T18:30:58ZPlastome evolution and organisation in the Hoya group (Apocynaceae)10.1038/s41598-021-93890-62045-2322https://doaj.org/article/988d5552ea9a4e1cbca72fdbb45c8a1d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93890-6https://doaj.org/toc/2045-2322Abstract The genus Hoya is highly diverse and many of its species are popular ornamental plants. However, the relationships between Hoya and related genera (the Hoya group) are not fully resolved. In this study, we report 20 newly sequenced plastomes of species in the Hoya group. The complete plastomes vary in length from 175,405 to 178,525 bp while the LSCs vary from 90,248 to 92,364 bp and the complete SSCs vary from 2,285 to 2,304 bp, making the SSC in the Hoya group one of the shortest known in the angiosperms. The plastome structure in the Hoya group is characterised by a massive increase in the size of the inverted repeats as compared to the outgroups. In all ingroup species, the IR/SSC boundary moved from ycf1 to ndhF while this was not observed in outgroup taxa, making it a synapomorphy for the Hoya group. We have also assembled the mitogenome of Hoya lithophytica, which, at 718,734 bp, is the longest reported in the family. The phylogenetic analysis using exons from 42 taxa in the Hoya group and three outgoups confirms that the earliest divergent genus in the Hoya group is Papuahoya, followed by Dischidia. The relationship between Dischidia and the clade which includes all Hoya and Oreosparte taxa, is not fully supported. Oreosparte is nested in Hoya making it paraphyletic unless Clemensiella is recognised as a separate genus.Michele RoddaMatti A. NiissaloNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Michele Rodda Matti A. Niissalo Plastome evolution and organisation in the Hoya group (Apocynaceae)
description	Abstract The genus Hoya is highly diverse and many of its species are popular ornamental plants. However, the relationships between Hoya and related genera (the Hoya group) are not fully resolved. In this study, we report 20 newly sequenced plastomes of species in the Hoya group. The complete plastomes vary in length from 175,405 to 178,525 bp while the LSCs vary from 90,248 to 92,364 bp and the complete SSCs vary from 2,285 to 2,304 bp, making the SSC in the Hoya group one of the shortest known in the angiosperms. The plastome structure in the Hoya group is characterised by a massive increase in the size of the inverted repeats as compared to the outgroups. In all ingroup species, the IR/SSC boundary moved from ycf1 to ndhF while this was not observed in outgroup taxa, making it a synapomorphy for the Hoya group. We have also assembled the mitogenome of Hoya lithophytica, which, at 718,734 bp, is the longest reported in the family. The phylogenetic analysis using exons from 42 taxa in the Hoya group and three outgoups confirms that the earliest divergent genus in the Hoya group is Papuahoya, followed by Dischidia. The relationship between Dischidia and the clade which includes all Hoya and Oreosparte taxa, is not fully supported. Oreosparte is nested in Hoya making it paraphyletic unless Clemensiella is recognised as a separate genus.
format	article
author	Michele Rodda Matti A. Niissalo
author_facet	Michele Rodda Matti A. Niissalo
author_sort	Michele Rodda
title	Plastome evolution and organisation in the Hoya group (Apocynaceae)
title_short	Plastome evolution and organisation in the Hoya group (Apocynaceae)
title_full	Plastome evolution and organisation in the Hoya group (Apocynaceae)
title_fullStr	Plastome evolution and organisation in the Hoya group (Apocynaceae)
title_full_unstemmed	Plastome evolution and organisation in the Hoya group (Apocynaceae)
title_sort	plastome evolution and organisation in the hoya group (apocynaceae)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/988d5552ea9a4e1cbca72fdbb45c8a1d
work_keys_str_mv	AT michelerodda plastomeevolutionandorganisationinthehoyagroupapocynaceae AT mattianiissalo plastomeevolutionandorganisationinthehoyagroupapocynaceae
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Plastome evolution and organisation in the Hoya group (Apocynaceae)

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