Extensive genomic rearrangements mediated by repetitive sequences in plastomes of Medicago and its relatives.

ABSTRACT:

Background

Although plastomes are highly conserved with respect to gene content and order in most photosynthetic angiosperms, extensive genomic rearrangements have been reported in Fabaceae, particularly within the inverted repeat lacking clade (IRLC) of Papilionoideae. Two hypotheses, i.e., the absence of the IR and the increased repeat content, have been proposed to affect the stability of plastomes. However, this is still unclear for the IRLC species. Here, we aimed to investigate the relationships between repeat content and the degree of genomic rearrangements in plastomes of Medicago and its relatives Trigonella and Melilotus, which are nested firmly within the IRLC.

Results

We detected abundant repetitive elements and extensive genomic rearrangements in the 75 newly as

SUBMITTER: Wu S 

PROVIDER: S-EPMC8438982 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature