Phylogenetic analyses suggest a hybrid origin of the figs (Moraceae: Ficus) that are endemic to the Ogasawara (Bonin) Islands, Japan

Kusumi, Junko; Azuma, Hiroshi; Tzeng, Hsy‐Yu; Chou, Lien‐Siang; Yan, Peng; Nakamura, Keiko; 蘇, 智慧

doi:10.1016/j.ympev.2012.01.004

Cited by 24 publications

(25 citation statements)

References 46 publications

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“…Although the effects of hybridization on the evolution of Ficus are still unclear, note that a recent study suggested a hybrid origin of endemic fig species in the Ogasawara Islands, which are oceanic islands separated from the mainland by approximately 1000 km [24] (Note that this implication was based on the discordance of phylogenetic positions between figs and fig-wasps on the Ogasawara Islands, and not on the genomic admixture of figs). This case implies that hybridizations of Ficus, as in other plant groups, may have contributed to speciation.…”

Section: Resultsmentioning

confidence: 99%

A Breakdown of Obligate Mutualism on a Small Island: An Interspecific Hybridization between Closely Related Fig Species (Ficus pumila and Ficus thunbergii) in Western Japan

Tsai¹,

Hayakawa²,

Fukuda³

et al. 2015

AJPS

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Ficus (Moraceae) is a well-known group with specific pollination mutualisms, and hybridization is considered to be rare. Here, we report the presence of interspecific hybrids between Ficus pumila L. and F. thunbergii Maxim. on Okinoshima, a small island offshore of Shikoku, western Japan. AFLP (amplified fragment length polymorphism of genomic DNA) data suggested that more than one-fourth of individuals of morphological F. pumila were assigned as intermediate genotypes, suggesting hybrids. The hybridization between the two species was introgressive and unidirectional from F. thunbergii to F. pumila. The findings of this study, combined with other previous reports, suggest that the breakdown of mutualistic systems can occur in isolated populations such as those on islands.

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Section: Resultsmentioning

confidence: 99%

A Breakdown of Obligate Mutualism on a Small Island: An Interspecific Hybridization between Closely Related Fig Species (Ficus pumila and Ficus thunbergii) in Western Japan

Tsai¹,

Hayakawa²,

Fukuda³

et al. 2015

AJPS

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“…However, some rare species showed their phylogenetic relationship with more than one taxon as shown in Figures 3, 4 and 5. Thus, nrDNA-ITS, is a potential marker for the phylogenetic study as it has been used in many taxa such as Silene section Melandrium (Rautenberg et al, 2010), Crocus (Harpke et al, 2012), Ficus (Kusumi et al, 2012), etc. The cladding of these taxa depended on the sequence similarity to those sequences retrieved from the GenBank database.…”

Section: Resultsmentioning

confidence: 99%

Assessment of phylogenetic relationship of rare plant species collected from Saudi Arabia using internal transcribed spacer sequences of nuclear ribosomal DNA

Al‐Qurainy¹,

Khan²,

Nadeem³

et al. 2013

Genet. Mol. Res.

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ABSTRACT.The rare and endangered plants of any country are important genetic resources that often require urgent conservation measures. Assessment of phylogenetic relationships and evaluation of genetic diversity is very important prior to implementation of conservation strategies for saving rare and endangered plant species. We used internal transcribed spacer sequences of nuclear ribosomal DNA for the evaluation of sequence identity from the available taxa in the GenBank database by using the Basic Local Alignment Search Tool (BLAST). Two rare plant species viz, Heliotropium strigosum claded with H. pilosum (98% branch support) and Pancratium tortuosum claded with P. tenuifolium (61% branch support) clearly. However, some species, viz Scadoxus multiflorus, Commiphora myrrha and Senecio hadiensis showed close relationships with more than one species. We conclude that nuclear ribosomal internal transcribed spacer sequences are useful markers for phylogenetic study of these rare plant species in Saudi Arabia.

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“…Such a high species diversity of Japanese plants, as well as the insect diversity, should be owed to various physical factors of location, climate, geography and geology of the Japanese Islands (Kubota et al ). In addition, insect‐plant coevolution would have enhanced speciation in some insect groups (Toju ; Azuma et al ; Aoki et al , ; Kusumi et al ).…”

Section: Mechanisms For Establishment Of Insect Diversity In Japanmentioning

confidence: 99%

Species diversity of insects in Japan: Their origins and diversification processes

Tojo

Sekiné

Takenaka

et al. 2017

Entomological Science

104

100

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Japan is considered a global hot spot of biodiversity. With regard to species diversity, insects are no exception. To date, more than 32,000 insect species have been identified in Japan, while around 100,000 species of insects are estimated to inhabit this country. In this paper, we outline background factors having contributed to diversification of Japanese insects. Of course, the high degree of Japanese insect diversity is the result of many complex factors. In addition to the humid Asian monsoon climate and the extensive latitudinal gradient of habitats, the extremely complex geological history has contributed as an important factor to generate and maintain the high species diversity and endemism. In particular, the independent origins of northeastern and southwestern Japan from the Eurasian continent have greatly contributed to the diverse composition of Japanese insect fauna. To highlight the importance of this process, we introduce some case studies and previously published papers focusing on several insect groups with low dispersal ability. Those cases indicate that the geological history of Japan has played an important role in the differentiation of Japanese insect species. Besides such geological factors, climatic and ecological factors in combination have contributed to the formation of Japanese insect fauna in complicated ways and produced its particularly high degree of biodiversity. The knowledge compiled here will provide useful information for future studies aiming to understand more deeply the processes of speciation and faunal formation of Japanese insects.

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Phylogenetic analyses suggest a hybrid origin of the figs (Moraceae: Ficus) that are endemic to the Ogasawara (Bonin) Islands, Japan

Cited by 24 publications

References 46 publications

A Breakdown of Obligate Mutualism on a Small Island: An Interspecific Hybridization between Closely Related Fig Species (Ficus pumila and Ficus thunbergii) in Western Japan

A Breakdown of Obligate Mutualism on a Small Island: An Interspecific Hybridization between Closely Related Fig Species (Ficus pumila and Ficus thunbergii) in Western Japan

Assessment of phylogenetic relationship of rare plant species collected from Saudi Arabia using internal transcribed spacer sequences of nuclear ribosomal DNA

Species diversity of insects in Japan: Their origins and diversification processes

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