e-journal

Molecular phylogeny revealed complex evolutionary process in Elymus species

---

Recent molecular phylogenetic studies on Elymus have added to our understanding of the origination of
Elymus species. However, evolutionary dynamics and speciation of most species in Elymus are unclear. Molecular
phylogeny has demonstrated that reticulate evolution has occurred extensively in the genus, as an example, the largest
subunit of RNA polymerase II (rpb2) and phosphoenolpyruvate carboxylase (pepC) data revealed two versions of the
St genome, St1 and St2 contributing to speciation of E. caninus. Phylogenetic analyses of E. pendulinus uncovered
additional genome‐level complexity. Our data indicated that both chloroplast and nuclear gene introgression have
occurred in the evolutionary process of E. pendulinus. Non‐donor species genomes have been detected in several
Elymus species, such as in allohexaploid E. repens (StStStStHH), a Taeniatherum‐like (Ta genome in Triticeae)
GBSSI sequence, Bromus‐ (Bromeae) and Panicum‐like (Paniceae) ITS sequences have been detected. The
chloroplast DNA data indicated that Pseudoroegneria is the maternal genome donor to Elymus species, but whether
different Elymus species originated from different St donors remains an open question. The origin of the Y genome in
Elymus is puzzling. It is clear that theY genome is distinct from the St genome, but unclear on the relationships ofY to other genomes in Triticeae. Introgressive hybridization may be an important factor complicating the evolutionary
history of the species in Elymus. The extent of introgression and its role in creating diversity in Elymus species should be the objective of further investigations.

Key words Elymus, evolutionary history, molecular phylogeny, reticulate evolution.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Systematics and Evolution

No. Panggil

-

Penerbit

: Institute of Botany., 2014

Deskripsi Fisik

Journal of Systematics and Evolution 52 (6): 706–711 (2014)

Bahasa

English

ISBN/ISSN

doi: 10.1111/jse.120

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

BIOLOGI

Info Detail Spesifik

-

Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar