趙永紅 李嬋 梅嘉洺



摘 要 利用SCoT分子標記對47個菌草種質資源進行遺傳多樣性分析。從20個SCoT引物中篩選出10個擴增效果好的引物,對47份菌草種質材料的DNA進行PCR擴增,共獲得282個多態片段。結合UPGMA聚類分析方法,算出47份種質材料間的遺傳相似系數(SM)在0.77-0.96,所有47份材料被區分開來,在遺傳相似系數為0.815時,47份材料可分為5大類群。研究結果表明,SCoT分子標記技術可有效用于菌草資源的遺傳多樣性分析。
關鍵詞 菌草 ;SCoT分子標記 ;種質資源 ;遺傳多樣性
中圖分類號 S216
Abstract The genetic diversity of 47 Juncao germplasms was analyzed by SCoT markers. Twenty ScoT primers were first used for screening on a subset of four germplasms, of which 10 gave good amplification patterns and were then used for analyzing the DNA of 47 JUNCAO germplasms. A total of 282 polymorphic DNA fragments were scored among the 47 JUNCAO germplasms from the electrophoresis patterns of the 10 selected SCoT primers. By using the NTSYS-pc 2.1 software combined with UPGMA clustering analysis method, the genetic similarity coefficient (SM) was calculated among all accessions and ranged from 0.77 to 0.96. All the 47 accessions were distinguished from each other. The 47 JUNCAO germplasms were clustered into five groups when the genetic similarity coefficient was 0.815. Our results showed that the SCoT markers could be effectively used for analysis of genetic diversity of Juncao germplasms.
Key words Juncao ; ScoT ; Germplasm ; Genetic diversity
菌草(JUNCAO)是指可用于栽培食用菌、藥用菌、培養基的野生和人工栽培的草本植物[1],如:蘆竹、蘆葦、類蘆等野生系列,還包括綠洲系列蘆竹、巨菌草、象草等人工栽培系列,廣義的菌草還包括甘蔗、玉米、高粱等作物。菌草一般叢生、直立,根系發達,產量高,多數菌草適應性廣,抗逆性強,適應于各種類型的土壤,酸性粗砂質紅壤和輕度鹽堿地均能生長。菌草用途廣泛,可作為豬、牛、羊等動物的飼料,可用于栽培食用菌,還可做非木材纖維制漿造紙原料,制造燃料乙醇等能源,同時還可以用于防止水土流失等。隨著菌草技術的完善和產業不斷壯大,關于菌草種質資源的收集、保存、鑒定及利用工作變得越來越迫切和重要。但是,由于可用作菌草的植物種類繁多,使得菌草種質資源在管理上存在一定盲目性和重復性。因而從分子水平上研究菌草種質資源遺傳的多樣性以及建立菌草種質分子鑒定技術非常重要。
隨著……