TY - JOUR

T1 - Phylogenetic and taxonomic relationships between morphotypes related to Elymus caninus (Poaceae) based on sequence of a nuclear gene GBSS1 (waxy) and sexual hybridization

AU - Agafonov, Alexander V.

AU - Shabanova, Elena V.

AU - Emtseva, Maria V.

AU - Asbaganov, Sergey V.

AU - Morozov, Igor V.

AU - Bondar, Alexander A.

AU - Dorogina, Olga V.

N1 - This work was performed with the 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. DNA sequencing was performed in Genomics Core Facility (ICBFM SB RAS, Novosibirsk).

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - Elymus

KW - Poaceae

KW - hybridization

KW - microevolution

KW - molecular markers

KW - speciation

KW - taxonomy

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85166543225&origin=inward&txGid=112cf97e8960253562824e991b3c8758

UR - https://www.mendeley.com/catalogue/145043c6-cd5f-3370-a265-3cd844a73034/

U2 - 10.1111/jse.13006

DO - 10.1111/jse.13006

M3 - Article

JO - Journal of Systematics and Evolution

JF - Journal of Systematics and Evolution

SN - 1759-6831

ER -