NGHIÊN CỨU MỐI QUAN HỆ PHÁT SINH CỦA CÁC LOÀI MACROSOLEN (BLUME) RCHB. (LORANTHACEAE) Ở VIỆT NAM DỰA TRÊN DỮ LIỆU PHÂN TỬ

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Tác giả: Chí Toàn Lê

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2022

Mô tả vật lý: tr.261-267

Bộ sưu tập: Metadata

ID: 332178

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Exploring the phylogenetic relationships between taxa provides important information for science. The phylogenetic study of Macrosolen was conducted based on molecular data sets of 27 taxa with five DNA regions including chloroplast rbcL, matK, and trnL-F and nuclear ribosomal (small subunit rDNA and large subunit rDNA) regions to reconstruct the phylogenetic relationship of Macrosolen. The Maximum likelihood (ML) and Bayesian inference (BI) methods were used to build the phylogenetic trees. The results of molecular analyses strongly supported the non-monophyly of Macrosolen with two major clades within the genus. The nest of the three genera Elytranthe, Lepidaria, and Macrosolen in the phylogenetic tree was recognized to be congruent in their morphology, molecules and distribution, but further study is necessary to resolve generic boundaries for stable classification for the three genera. The endemic species of Vietnam M. bidoupensis well supported as closely related to M. tricolor by molecular data. Macrosolen from Vietnam is genetically congruent with its individuals of the same species from other countries.Khám phá mối quan hệ phát sinh loài giữa các đơn vị phân loại cung cấp thông tin quan trọng cho khoa học. Nghiên cứu phát sinh loài của chi Macrosolen được thực hiện dựa trên bộ dữ liệu phân tử của 27 mẫu nghiên cứu với năm vùng DNA bao gồm các gen lục lạp rbcL, matK, và trnL-F và gen nhân (SSU rDNA và LSU rDNA). Các phương pháp Maximum likelihood (ML) và Bayesian inference (BI) được sử dụng để xây dựng cây phát sinh loài. Các kết quả phân tích dữ liệu phân tử ủng hộ mạnh mẽ rằng Macrosolen không phải là đơn phát sinh với hai nhánh phát sinh chính trong chi này. Sự đan xen vào nhau của ba chi Elytranthe, Lepidaria và Macrosolen trên cây phát sinh được ghi nhận là tương đồng với dữ liệu hình thái, phân tử và sự phân bố của chúng, tuy nhiên cần nghiên cứu thêm để giải quyết rõ ràng các ranh giới cho một sắp xếp phân loại chắc chắn cho ba chi. Loài đặc hữu M. bidoupensis của Việt Nam có quan hệ di truyền gần gũi với M. tricolor dựa trên dữ liệu phân tử. Nhìn chung, các mẫu Macrosolen ở Việt Nam có sự tương đồng di truyền với các mẫu của chi này từ các nước khác.

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