Biosystematics studies on Elymus breviaristatus and Elymus sinosubmuticus (Poaceae: Triticeae).

Autor: Tan L; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Huang QX; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Song Y; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Wu DD; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Cheng YR; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Zhang CB; Sichuan Academy of Grassland Science, Chengdu, 610000, Sichuan, China., Sha LN; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China., Fan X; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Kang HY; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Wang Y; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China., Zhang HQ; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China. haiqinzhang@163.com.; College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China. haiqinzhang@163.com., Zhou YH; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China. zhouyh@sicau.edu.cn.; State Key Laboratory of Crop Genetic Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, China. zhouyh@sicau.edu.cn.
Jazyk: angličtina
Zdroj: BMC plant biology [BMC Plant Biol] 2022 Feb 01; Vol. 22 (1), pp. 57. Date of Electronic Publication: 2022 Feb 01.
DOI: 10.1186/s12870-022-03441-y
Abstrakt: Background: Elymus breviaristatus and Elymus sinosubmuticus are perennial herbs, not only morphologically similar but also sympatric distribution. The genome composition of E. sinosubmuticus has not been reported, and the relationship between E. sinosubmuticus and E. breviaristatus is still controversial. We performed artificial hybridization, genomic in situ hybridization, and phylogenetic analyses to clarify whether the two taxa were the same species.
Results: The high frequency bivalent (with an average of 20.62 bivalents per cell) at metaphase I of pollen mother cells of the artificial hybrids of E. breviaristatus (StYH) × E. sinosubmuticus was observed. It illustrated that E. sinosubmuticus was closely related to E. breviaristatus. Based on genomic in situ hybridization results, we confirmed that E. sinosubmuticus was an allohexaploid, and the genomic constitution was StYH. Phylogenetic analysis results also supported that this species contained St, Y, and H genomes. In their F 1 hybrids, pollen activity was 53.90%, and the seed setting rate was 22.46%. Those indicated that the relationship between E. sinosubmuticus and E. breviaristatus is intersubspecific rather than interspecific, and it is reasonable to treated E. sinosubmuticus as the subspecies of E. breviaristatus.
Conclusions: In all, the genomic constitutions of E. sinosubmuticus and E. breviaristatus were StYH, and they are species in the genus Campeiostachys. Because E. breviaristatus was treated as Campeistachys breviaristata, Elymus sinosubmuticus should be renamed Campeiostachys breviaristata (Keng) Y. H. Zhou, H. Q. Zhang et C. R. Yang subsp. sinosubmuticus (S. L. Chen) Y. H. Zhou, H. Q. Zhang et L. Tan.
(© 2022. The Author(s).)
Databáze: MEDLINE
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