福建东山湾几种产胶红藻的DNA条形码记录  

Records of Several Species of Gracilariales Economic Red Algae in Dongshan Bay,Fujian

作　　者：刘晨临 李艳 王晓 孙萍 LIU Chenlin;LI Yan;WANG Xiao;SUN Ping(Marine Bioresources and Environmental Research Center,First Institute of Oceanography,MNR,Qingdao 266061,China;Key Lab of Marine Ecological-Environmental Science and Technology,MNR,Qingdao 266061,China;Marine Ecology Research Center,First Institute of Oceanography,MNR,Qingdao 266061,China)

机构地区：[1]自然资源部第一海洋研究所海洋生物资源与环境研究中心,山东青岛266061 [2]自然资源部海洋生态环境科学与技术重点实验室,山东青岛266061 [3]自然资源部第一海洋研究所海洋生态研究中心,山东青岛266061

出　　处：《海洋科学进展》2024年第3期568-577,共10页Advances in Marine Science

基　　金：国家自然科学基金项目(42176242)。

摘　　要：杉菜目红藻中沙菜产卡拉胶,江蓠和龙须菜产琼胶,都具有重要的经济价值。本文对易曲沙菜(Hypnea flexicaulis)、真江蓠(Gracilaria vermiculophylla)和龙须菜(Gracilariopsis lemaneiformis)等几株福建东山湾杉菜目红藻进行了形态描述和DNA条形码分析,并基于线粒体细胞色素C氧化酶亚基I(COI)基因和核酮糖-1,5-二磷酸羧化酶大亚基(rbc L)基因比对结果。基于COI基因的遗传多样性分析发现,形态上有区别的东山湾易曲沙菜存在3种不同单倍型,其中2种单倍型之前未被报道过,第三种与中国台湾、韩国济州岛的样品为共享单倍型。东山湾的真江蓠样品,在分布于西北太平洋的真江蓠COI基因的单倍型中,属于末支单倍型,其进化时间较晚。龙须菜样品与北方栽培种序列一致。本文初步揭示了东山湾具有丰富的产胶经济红藻资源,其中卡拉胶原料藻沙菜的生物多样性较高,有很好的开发利用前景。Of seaweeds from Gracilariales,Hypnea produces kappa carrageenan,and Gracilaria and Gracilariopsis produce agar,both of which have important commercial value.This study provides morphological descriptions and DNA barcoding analysis of several red algae isolates from Dongshan Bay,Fujian Province.Based on the DNA barcode marker COI(Cytochrome Oxidase I)and rbcL gene,they are Hypnea flexicaulis,Gracilaria vermiculophylla and Gracilariopsis lemaneiformis.The genetic diversity analyses based on the COI gene showed that three different haplotypes of H.flexicaulis were identified.Two of them were never reported before,and the third on was the shared haplotype with samples from Taiwan and Jeju Island,with corresponding morphological differences.The Gracilaria vermiculophylla samples from Dongshan Bay belong to the late-branching haplotype of the COI gene sequences,which evolved later than other haplotypes that distributed in the northwest Pacific.Four samples of Gracilariopsis lemaneiformis from Dongshan Bay have the same sequences as those of northern cultivated strains.This study preliminarily revealed the rich diversity of Gigartinales red algae in the intertidal zone of Dongshan Bay,providing basic data for the development and utilization of algal resources in this region.

关 键 词：东山湾 杉菜目 沙菜 COI基因 RBCL基因 

分 类 号：S917.1[农业科学—水产科学]