Musa ruiliensis (Musaceae, Section Musa), a new species from Yunnan, China

Chen, Wenna; Häkkinen, Markku; Ge, Xue‐Jun

doi:10.11646/phytotaxa.172.2.6

Cited by 5 publications

(6 citation statements)

References 33 publications

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“…M. tongbiguanensis is a new species of Musa that we observed and described in Yunnan, China (Chen et al , 2008). The vernacular name of M. tongbiguanensis is ‘lubajiao’ (green banana); its main characteristics are large fruit and seeds (seeds are approximately two-fold larger than those of M. acuminata var.…”

Section: Discussionmentioning

confidence: 96%

Molecular phylogeny of genus Musa determined by simple sequence repeat markers

Feng

You

et al. 2015

Plant Genet. Resour.

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Musa L. was previously separated into five sections (Eumusa, Rhodochlamys, Callimusa, Australimusa and Ingentimusa) based on basic chromosome numbers and morphological characters. However, several molecular analyses currently support restructuring of Musa species into two sections, Musa and Callimusa. The application of simple sequence repeat molecular marker analysis to Musa phylogeny provided valuable, supplemental information about the classification of, and relationships between, Musa species and subspecies. Totally, 28 accessions of Musa acuminata Colla subspecies and varieties and 25 accessions of other Musa species were evaluated; 12 primers produced 91 polymorphic bands, polymorphic information content ranged from 0.4473 to 0.8394 (average ¼ 0.7226), indicating that the primers showed a high level of polymorphism. Our results generally agreed with previous phylogenetic analyses based on molecular data. One clade comprised species of sections Australimusa and Callimusa (X ¼ 10/9); most species of sections Eumusa and Rhodochlamys (X ¼ 11) formed the other clade. The relationships between most species were as expected; however, some species did not conform to findings of previous studies. A wide range of variability was observed in the M. acuminata complex. M. acuminata var. chinensis and M. acuminata subsp. 522 showed the most distant relationships to other subspecies: Musa laterita, Musa ornata and Musa velutina clustered with M. acuminata var. chinensis, suggesting that they may constitute a secondary gene pool for the improvement of cultivated bananas. Molecular data indicated that Musa tongbiguanensis Chen You & Yao-Ting Wu, which was observed and described by our research group in Yunnan, China, was a distinct, new species.

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Section: Discussionmentioning

confidence: 96%

Molecular phylogeny of genus Musa determined by simple sequence repeat markers

Feng

You

et al. 2015

Plant Genet. Resour.

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“…Based on the study of Häkkinen & Väre () and the number of newly described Musa species since 2008 (e.g. Chen et al ., ; Dey et al ., ), we estimate the number of Musa species at c . 70 distinct entities.…”

Section: Methodsmentioning

confidence: 98%

“…Based on the study of H€ akkinen & V€ are (2008) and the number of newly described Musa species since 2008 (e.g. Chen et al, 2014;Dey et al, 2014), we estimate the number of Musa species at c. 70 distinct entities. In addition, based on the rather clear delimitation of most Musa acuminata subspecies in our phylogenetic analyses and the general, often arbitrary, delineation of natural lineages in species or subspecies (Hamilton & Reichard, 1992;Mayr, 2000), we decided to consider the different subspecies of Musa acuminata (and likewise also the subspecies of other Musa species) as different entities for both diversification rate methods.…”

Section: Musaceae Diversificationmentioning

confidence: 99%

Evolutionary dynamics and biogeography ofMusaceae reveal a correlation between the diversification of the banana family and the geological and climatic history of Southeast Asia

Janssens

Vandelook

Langhe³

et al. 2016

New Phytologist

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Summary Tropical Southeast Asia, which harbors most of the Musaceae biodiversity, is one of the most species‐rich regions in the world. Its high degree of endemism is shaped by the region's tectonic and climatic history, with large differences between northern Indo‐Burma and the Malayan Archipelago. Here, we aim to find a link between the diversification and biogeography of Musaceae and geological history of the Southeast Asian subcontinent.The Musaceae family (including five Ensete, 45 Musa and one Musella species) was dated using a large phylogenetic framework encompassing 163 species from all Zingiberales families. Evolutionary patterns within Musaceae were inferred using ancestral area reconstruction and diversification rate analyses.All three Musaceae genera – Ensete, Musa and Musella – originated in northern Indo‐Burma during the early Eocene. Musa species dispersed from ‘northwest to southeast’ into Southeast Asia with only few back‐dispersals towards northern Indo‐Burma.Musaceae colonization events of the Malayan Archipelago subcontinent are clearly linked to the geological and climatic history of the region. Musa species were only able to colonize the region east of Wallace's line after the availability of emergent land from the late Miocene onwards.

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“…Overall, classification of plants within the genus Musa is difficult even for skilled taxonomists, and new taxa have been reported mainly based on morphological characters [ 40 – 42 , 47 – 49 ]. This study demonstrated the feasibility of using high-throughput sequencing data, in association with biological information such as morphological characters, biogeographic history, and ecological differentiation for the delimitation of ESUs within the genus Musa .…”

Section: Discussionmentioning

confidence: 99%

High cryptic species diversity is revealed by genome-wide polymorphisms in a wild relative of banana, Musa itinerans, and implications for its conservation in subtropical China

Yang

et al. 2018

BMC Plant Biol

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BackgroundSpecies delimitation is a challenging but essential task in conservation biology. Morphologically similar species are sometimes difficult to recognize even after examination by experienced taxonomists. With the advent of molecular approaches in species delimitation, this hidden diversity has received much recent attention. In addition to DNA barcoding approaches, analytical tools based on the multi-species coalescence model (MSC) have been developed for species delimitation. Musa itinerans is widely distributed in subtropical Asia, and at least six varieties have been documented. However, the number of evolutionarily distinct lineages remains unknown.ResultsUsing genome resequencing data of five populations (making up four varieties), we examined genome-wide variation and found four varieties that were evolutionary significant units. A Bayesian Phylogenetics and Phylogeography (BP&P) analysis using 123 single copy nuclear genes support three speciation events of M. itinerans varieties with robust posterior speciation probabilities; However, a Bayes factor delimitation of species with genomic data (BFD*) analysis using 1201 unlinked single nucleotide polymorphisms gave decisive support for a five-lineage model. When reconciling divergence time estimates with a speciation time scale, a modified three-lineage model was consistent with that of BP&P, in which the speciation time of two varieties (M. itinerans var. itinerans and M. itinerans var. lechangensis) were dated to 26.2 kya and 10.7 kya, respectively. In contrast, other two varieties (M. itinerans var. chinensis and M. itinerans var. guangdongensis) diverged only 3.8 kya in the Anthropocene; this may be a consequence of genetic drift rather than a speciation event.ConclusionOur results showed that the M. itinerans species complex harbours high cryptic species diversity. We recommend that M. itinerans var. itinerans and M. itinerans var. lechangensis be elevated to subspecies status, and the extremely rare latter subspecies be given priority for conservation. We also recommend that the very recently diverged M. itinerans var. chinensis and M. itinerans var. guangdongensis should be merged under the subspecies M. itinerans var. chinensis. Finally, we speculate that species delimitation of recently diverged lineages may be more effective using genome-wide bi-allelic SNP markers with BFD* than by using unlinked loci and BP&P.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1410-6) contains supplementary material, which is available to authorized users.

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Musa ruiliensis (Musaceae, Section Musa), a new species from Yunnan, China

Cited by 5 publications

References 33 publications

Molecular phylogeny of genus Musa determined by simple sequence repeat markers

Molecular phylogeny of genus Musa determined by simple sequence repeat markers

Evolutionary dynamics and biogeography ofMusaceae reveal a correlation between the diversification of the banana family and the geological and climatic history of Southeast Asia

High cryptic species diversity is revealed by genome-wide polymorphisms in a wild relative of banana, Musa itinerans, and implications for its conservation in subtropical China

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