Phylogenetic and taxonomic relationships between morphotypes related to Elymus caninus(Poaceae)based on sequence of a nuclear gene GBSS1(waxy)and sexual hybridization  

作　　者：Alexander V.Agafonov Elena V.Shabanova Maria V.Emtseva Sergey V.Asbaganov Igor V.Morozov Alexander A.Bondar Olga V.Dorogina 

机构地区：[1]Laboratory of Introduction Rare and Endadgered plant species,Central Siberian Botanical Garden,Siberian Branch of the Russian Academy of Sciences,Zolotodolinskaya Street,101,Novosibirsk 630090,Novosibirsk Region,Russia [2]SB RAS Genomics Core Facility,Institute of Chemical Biology and Fundamental Medicine,Siberian Branch of the Russian Academy of Sciences,Akademika Lavrentieva Avenue,8,Novosibirsk 630090,Novosibirsk Region,Russia [3]Novosibirsk State University,Pirogova Street,1,Novosibirsk 630090,Russia

出　　处：《Journal of Systematics and Evolution》2024年第3期520-533,共14页植物分类学报（英文版）

基　　金：support of the grant of the Russian Science Foundation No.23-24-00260,https://rscf.ru/project/23-24-00260/;The materials of the bio-resource scientific collections of the CSBG SB RAS USU No.440534 and USU No.440537 (Herbaria NS,NSK)were used.

摘　　要：We represent a comparative analysis of GBSS1 gene fragment sequences for a number of species related to Elymus caninus:Elymus prokudinii,Elymus viridiglumis,Elymus goloskokovii,as well as a number of morphologically deviating biotypes,inhabiting Russia and Kazakhstan.Microevolutionary relationships between species were assessed from dendrograms derived from sequences of exons and introns.In all taxa,the St subgenome was represented by St2 variants,rather typical of the North American ancestral line of Pseudoroegneria spicata than of the Asian line descending from Pseudoroegneria strigosa.All putative relatives of E.caninus had H1 subgenome variants linked around the Asian diploid carrier of the H genome from Hordeum jubatum and were divided into two subclades.One of them(H1-1)contained most of the closely related E.caninus clones,including Elymus uralensis.Another subclade(H1-2)consisted of five variants phylogenetically related to Elymus mutabilis.We have also studied reproductive relationships between species E.goloskokovii,E.prokudinii,and E.viridiglumis and the degree of their integration into the E.caninus complex.Biotypes included in sexual hybridization formed a single recombination gene pool,within which slight differences in reproductive compatibility were observed.A comprehensive study of microevolutionary differentiation of taxa showed the expediency of taxonomic revision.The species mentioned should probably be relegated to the infraspecific rank within E.caninus s.l.

关 键 词：ELYMUS hybridization MICROEVOLUTION molecular markers POACEAE speciation taxonomy 

分 类 号：Q94[生物学—植物学]