Does infraspecific taxonomy match species evolutionary history? A phylogeographic study of Arundo formosana (Poaceae)

Hardion, Laurent; Verlaque, Régine; Vorontsova, Maria S.; Combroux, Isabelle; Chen, Chien-Wen; Takamizo, Tadashi; Vila, Bruno

doi:10.1093/botlinnean/bow006

Cited by 17 publications

(12 citation statements)

References 48 publications

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“…The clade of the A. donax invasive clone was basal to that of Asian A. donax accessions. As expected, monophyly of A. formosana was instead well supported [ 2 ]. All our samples used for RNA-Seq are correctly clustered with the corresponding species.…”

Section: Resultssupporting

confidence: 54%

“…In this study, the leaf transcriptomes for all recognized taxa of the Arundo genus and three Aundinoideae outgroups were generated and annotated, allowing the first nuclear phylogenomic reconstruction of the Arundo , which up to now was based only on plastidial datasets [ 2 , 4 ].…”

Section: Discussionmentioning

confidence: 99%

“…The basal position of A. formosana strongly supports the origin and diversification of Arundo in Eastern Asia during the Miocene. This timing predates the tectonic event that led to isolation of Taiwan island, suggesting that interspecific competition with other Arundo lineages may have at least in part contributed to vicariance of A. formosana to Taiwan and the Ryukyu islands [ 2 ]. Additionally, it indicates that future efforts of comparative genome sequencing in the Arundo genus should include A. formosana as reference species.…”

Section: Discussionmentioning

confidence: 99%

“…Recent taxonomic revisions indicated that up to five species mostly occurring in lowlands and sites affected by human disturbance of the landscape may be included in the Arundo genus, namely Arundo formosana , A. plinii , A. donaciformis , A. micrantha and A. donax [ 1 ]. A. formosana is an endemic species of Taiwan and the Ryukyu Islands encompassing two subspecies and a total of three varieties [ 2 ]. This grass reproduces sexually and it is dispersed through wind via seeds.…”

Section: Introductionmentioning

confidence: 99%

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Phylogenomic proof of Recurrent Demipolyploidization and Evolutionary Stalling of the “Triploid Bridge” in Arundo (Poaceae)

Jike

Zadra

et al. 2020

IJMS

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Polyploidization is a frequent phenomenon in plants, which entails the increase from one generation to the next by multiples of the haploid number of chromosomes. While tetraploidization is arguably the most common and stable outcome of polyploidization, over evolutionary time triploids often constitute only a transient phase, or a “triploid bridge”, between diploid and tetraploid levels. In this study, we reconstructed in a robust phylogenomic and statistical framework the evolutionary history of polyploidization in Arundo, a small genus from the Poaceae family with promising biomass, bioenergy and phytoremediation species. Through the obtainment of 10 novel leaf transcriptomes for Arundo and outgroup species, our results prove that recurrent demiduplication has likely been a major driver of evolution in this species-poor genus. Molecular dating further demonstrates that the species originating by demiduplication stalled in the “triploid bridge” for evolutionary times in the order of millions of years without undergoing tetratploidization. Nevertheless, we found signatures of molecular evolution highlighting some of the processes that accompanied the genus radiation. Our results clarify the complex nature of Arundo evolution and are valuable for future gene functional validation as well as reverse and comparative genomics efforts in the Arundo genus and other Arundinoideae.

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Section: Resultssupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogenomic proof of Recurrent Demipolyploidization and Evolutionary Stalling of the “Triploid Bridge” in Arundo (Poaceae)

Jike

Zadra

et al. 2020

IJMS

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“…Owing to the paucity of fossil records, we made use of geological information to calibrate our analyses. The Taiwanese endemic A. formosana is a close relative of A. donax (Hardion et al, , ). Taiwan and Ryukyu islands constitute an archipelago on the western rim of the Pacific Ocean.…”

Section: Methodsmentioning

confidence: 99%

Multiple evolutionary lineages detected in giant reed (Arundo donax L.): Applied and evolutionary perspectives

Zecca

Tommasi

Grassi

2020

Annals of Applied Biology

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Identification of independent evolutionary lineages is a modern challenge for biologists especially in crops with high potential. Molecular methods, usually used to explore intraspecific variation, also offer important information regarding how and when lineages have evolved and spread. Today, several tools to define the demarcation of lineages based on single or multi-locus data are available, permitting objective results to be obtained. We tested nuclear and plastid loci using five different approaches to delimit the major lineages and estimate the divergence times in giant reed (Arundo donax L.). It is an emerging energy crop, widespread in sub-tropical and temperate regions but particularly aggressive outside its native range. Our results support the presence of six lineages distributed from the Asian regions to the Mediterranean basin and indicate the western and southern edges of the Qinghai-Tibet Plateau as the putative area of origin and source of ancient and cryptic lineages. We suppose it could be an area that has fertile populations. These results should be considered in breeding programmes to produce new cultivars, especially because the absence of fertility for Mediterranean giant reed lineages reduces the opportunity of crop improvement. Moreover, the description of multiple lineages and identifying its putative ancestral area may be helpful to researchers working on invasiveness management, phytoremediation programmes and conservation biology.

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Cowpea [Vigna unguiculata (L.) Walp.] maternal lineages, chloroplast captures, and wild cowpea evolution

Pasquet

Feleke

Gepts

2021

Genet Resour Crop Evol

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Vigna unguiculata is the major grain legume in Africa and is also important in South-East Asia as a vegetable. The wild relatives, present only in Africa, are currently made of ten subspecies. However, while the different groups are well identified, the relationships between them are not firmly established. The present study of chloroplast diversity through restriction fragment length polymorphism confirms the different groups, as well as the split between savannah subspecies and forest subspecies. It justifies treating subsp. stenophylla as a subspecies independent from subsp. protracta and invalidates the subsp. stenophylla sensu lato concept. It suggests that the species V. unguiculata originated in southern Africa and that the annual subsp. unguiculata var. spontanea originated in eastern Africa. More importantly, it proves that three subspecies are of hybrid origin, between the annual var. spontanea and various perennial subspecies from southern Africa with left-twisted keel. Owing to its annual and inbred properties, var. spontanea spread across all African low-to medium-altitude savannahs, displacing the lefttwisted keel savannah perennials from their warmer and drier areas.

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Does infraspecific taxonomy match species evolutionary history? A phylogeographic study of Arundo formosana (Poaceae)

Cited by 17 publications

References 48 publications

Phylogenomic proof of Recurrent Demipolyploidization and Evolutionary Stalling of the “Triploid Bridge” in Arundo (Poaceae)

Phylogenomic proof of Recurrent Demipolyploidization and Evolutionary Stalling of the “Triploid Bridge” in Arundo (Poaceae)

Multiple evolutionary lineages detected in giant reed (Arundo donax L.): Applied and evolutionary perspectives

Cowpea [Vigna unguiculata (L.) Walp.] maternal lineages, chloroplast captures, and wild cowpea evolution

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