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Generic identity of Camptorrhiza indica (Colchicaceae) based on cytogenetics and molecular phylogenetics
Author(s) -
Lekhak Manoj M.,
Surveswaran Siddharthan,
Yadav Shrirang R.
Publication year - 2016
Publication title -
journal of systematics and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.249
H-Index - 46
eISSN - 1759-6831
pISSN - 1674-4918
DOI - 10.1111/jse.12165
Subject(s) - biology , genus , botany , phylogenetic tree , zoology , evolutionary biology , genetics , gene
The tribe Iphigenieae (Colchicaceace, Liliales) includes two genera, viz. Camptorrhiza and Iphigenia , which are distributed in Africa, India, and Australasia. Iphigenia is represented by 12 species, of which six occur in India while Camptorrhiza comprises one species each in Africa ( C. strumosa ) and India ( C. indica ). The genus Camptorrhiza possesses a knee‐shaped tuber attached to the corms, filaments with a thick bulge in the middle and styles with single stigma. Iphigenia on the other hand lacks knee‐shaped tuber, bears linear filaments and has styles with three stigmas. Camptorrhiza indica possesses ovoid corms, linear filaments and styles with a single stigma. These characters are intermediate between Iphigenia and Camptorrhiza and hence we studied the cytogenetics and phylogenetic placement of this species to ascertain its generic identity. Somatic chromosome count (2 n = 22) and karyotypic features of C. indica are very similar to that of Iphigenia species. Molecular phylogenetic studies based on atpB‐rbcL , rps16, trnL , and trnL‐F regions showed that C. indica is nested within a lineage of Indian Iphigenia species. Thus, C. indica was reduced to a species of Iphigenia , i.e., I. ratnagirica . Camptorrhiza is now a monotypic genus restricted only to southern Africa. A key to the Indian Iphigenia species is provided. In addition, a new combination Wurmbea novae‐zelandiae is proposed for Iphigenia novae‐zelandiae .