Asset Details
Do you wish to reserve the book?
Rapid diversification of St-genome-sharing species in wheat grasses (Triticeae: Poaceae) accompanied by diversifying selection of chloroplast genes
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Rapid diversification of St-genome-sharing species in wheat grasses (Triticeae: Poaceae) accompanied by diversifying selection of chloroplast genes
Do you wish to request the book?
Rapid diversification of St-genome-sharing species in wheat grasses (Triticeae: Poaceae) accompanied by diversifying selection of chloroplast genes
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Rapid diversification of St-genome-sharing species in wheat grasses (Triticeae: Poaceae) accompanied by diversifying selection of chloroplast genes
2025
Overview
Background
The
St
-genome-sharing taxa are highly complex group of the species with the
St
nuclear genome and monophyletic origin in maternal lineages within the Triticeae, which contains more than half of polyploid species that distributed in a wide range of ecological habitats. While high level of genetic heterogeneity in plastome DNA due to a reticulate evolutionary event has been considered to link with the richness of the
St
-genome-sharing taxa, the relationship between the dynamics of diversification and molecular evolution is lack of understanding.
Results
Here, integrating 106 previously and 12 newly sequenced plastomes representing almost all previously recognized genomic types and genus of the Triticeae, this study applies phylogenetic reconstruction methods in combination with lineage diversification analyses, estimate of sequence evolution, and gene expression to investigate the dynamics of diversification in the tribe. Phylogenomic analysis confirmed previous phylogenetic relationships, with the
St
/
E
/
V
lineages (
Pseudoroegneria
/
Lophopyrum
+
Thinopyrum
/
Dasypyrum
) being suffered from a chloroplast capture event prior to polyploidization events. Analyses of diversification rates detected a significant acceleration approximately five million years ago in the
St
-genome-sharing taxa. Molecular tests of evolution and gene expression further indicated that radiation within the accelerated group has been accompanied by adaptive genetic changes in a few chloroplast-encoded genes directly or indirectly related to photosynthesis.
Conclusions
Our results support an important role for adaptive evolution in plastomes during accelerated diversification. In combination with plastome data, further investigations using other genomes, such as the nuclear genome, are urgently needed to enhance our understanding of the evolutionary history of the
St
-genome-sharing taxa, especially to determine whether adaptive changes in the nuclear genome are accelerated as well because plastome represents the maternal inheritation in angiosperms.
