Molecular phylogenetic reconstruction improves the taxonomic understanding of Indian Dipcadi (Asparagaceae) and reveals a new species from the bank of Hiranyakeshi River, Maharashtra, India.

Shelke, P E; Tamboli, A S; Surveswaran, S; Yadav, S R; Choo, Y-S; Pak, J H; Lekhak, M M

Shelke, P E; Tamboli, A S; Surveswaran, S; Yadav, S R; Choo, Y-S; Pak, J H; Lekhak, M M.

Afiliación

Shelke PE; Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur, Maharashtra, 416004, India.
Tamboli AS; Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea.
Surveswaran S; Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, 500046, India.
Yadav SR; Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur, Maharashtra, 416004, India.
Choo YS; Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea.
Pak JH; Department of Biology, School of Life Sciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea.
Lekhak MM; Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea.

J Plant Res ; 137(5): 829-845, 2024 Sep.

Article en En | MEDLINE | ID: mdl-39009902

ABSTRACT

ABSTRACT

Dipcadi (Scilloideae Asparagaceae) is a genus of bulbous monocots with approximately 40 species, of which 13 occur in India. Species delimitation within the genus has been troublesome hindering a comprehensive phylogenetic analysis. The most recent phylogeny of the subfamily Ornithogaloideae included six species of Dipcadi only from Africa. Here, we reconstructed the phylogeny of Ornithogaloideae including 23 accessions comprising 13 recognized taxa (11 species and two varieties) of Indian Dipcadi. The phylogenetic analyses were based on nucleotide sequences of three plastid regions (rbcL, matK and trnL-F spacer) and one nuclear region (ITS). Pseudogaltonia clavata exhibited sister relationship to Dipcadi. Our combined nuclear + plastid dataset analyses revealed a monophyletic Dipcadi with five clades, Clade I-V. Clade I, II and III included mainly Indian species whereas Clade V included mostly African species. Clade IV comprised D. serotinum. Clade I included nine taxa including our newly described species, D. mukaianum. The new species was phylogenetically placed with D. erythraeum, D. saxorum and D. ursulae. Morphologically, the species resembled D. montanum and D. ursulae but differed in characters such as tepal cohesion, number of ovules per locule and foul-smelling flowers. Clade II and III included 11 and six taxa, respectively. D. erythraeum which has a native range from Egypt to western India was found in Clades I and V. The widespread Dipcadi species, viz. D. erythraeum and D. serotinum showed polyphyly however, the monophyly of Dipcadi is established. Our studies suggest that additional molecular markers (plastid as well as nuclear) should be tested for their taxonomy utility. Further work on the historical biogeography of Dipcadi on the subfamily Ornithogaloideae with more genetic data will yield insights how aridification of the landscape would have shaped the evolution of the geographical clades.

Asunto(s)

Asparagaceae; Filogenia; India; Asparagaceae/genética; Asparagaceae/clasificación; Plastidios/genética; ADN de Plantas/genética; Análisis de Secuencia de ADN

Palabras clave

Dipcadi; ITS; Monocots; Scilloideae; Taxonomy; cpDNA

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Asparagaceae País/Región como asunto: Asia Idioma: En Revista: J Plant Res Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: India Pais de publicación: Japón

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