Evolutionary genomics of two diploid goat grass species belonging to the section Sitopsis of Aegilops, Aegilops longissima, and Aegilops sharonensis.
Plant J
; 119(3): 1543-1557, 2024 Aug.
Article
in En
| MEDLINE
| ID: mdl-38859560
ABSTRACT
Aegilops longissima and Ae. sharonensis, being classified into the Sitopsis section of genus Aegilops, are distinct species both taxonomically and ecologically. Nevertheless, earlier observations indicate that the two species are not reproductively isolated to full extent and can inter-bred upon secondary contact. However, the genomic underpinnings of the morpho-ecological differentiation between the two foci species remained unexplored. Here, we resequenced 31 representative accessions of the two species and conducted in-depth comparative genomic analyses. We demonstrate recurrent and ongoing natural hybridizations between Ae. longissima and Ae. sharonensis, and depict features of genome composition of the resultant hybrids at both individual and population levels. We also delineate genomic regions and candidate genes potentially underpinning the differential morphological and edaphic adaptations of the two species. Intriguingly, a binary morphology was observed in the hybrids, suggesting existence of highly diverged genomic regions that remain uneroded by the admixtures. Together, our results provide new insights into the molding effects of interspecific hybridization on genome composition and mechanisms preventing merge of the two species.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Genome, Plant
/
Diploidy
/
Aegilops
/
Hybridization, Genetic
Language:
En
Journal:
Plant J
Journal subject:
BIOLOGIA MOLECULAR
/
BOTANICA
Year:
2024
Document type:
Article
Affiliation country: