The Evolution and Origin of Allotetraploid Aegilops geniculata Revealed by the Homoeolog-Resolved Genome Assembly.

ABSTRACT: Aegilops geniculata Roth is a tetraploid (M^gM^gU^gU^g; 2n = 4x = 28) wild relative of wheat and a valuable source of genetic diversity for improving agronomic traits. We present a high-quality homoeolog-resolved assembly and annotation of the Ae. geniculata genome and use it to study the function, origin and evolution of the M^g and U^g genomes. Comparative genomics revealed that the U^g genome has undergone extensive structural rearrangements (SRAs), which were inherited from its diploid ancestor. Chromosomes 4U^g experienced the most extensive SRAs, including translocations from chromosomes 1, 2, 6 and 7, as well as a pericentric inversion that repositioned the centromere closer to the chromosome terminus. T

SUBMITTER: Yunusbaev U 

PROVIDER: S-EPMC12946516 | biostudies-literature | 2026 Mar

REPOSITORIES: biostudies-literature