Open AccessOrganellar genome analysis reveals endosymbiotic gene transfers in tomato
Author(s) -
Hyoung Tae Kim,
Je Min Lee
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0202279
Subject(s) - biology , genome , mitochondrial dna , plastid , nuclear gene , nuclear dna , solanum , chloroplast dna , gene , genetics , dna , dna sequencing , evolutionary biology , botany , chloroplast
We assembled three complete mitochondrial genomes (mitogenomes), two of Solanum lycopersicum and one of Solanum pennellii , and analyzed their intra- and interspecific variations. The mitogenomes were 423,596–446,257 bp in length. Despite numerous rearrangements between the S . lycopersicum and S . pennellii mitogenomes, over 97% of the mitogenomes were similar to each other. These mitogenomes were compared with plastid and nuclear genomes to investigate genetic material transfers among DNA-containing organelles in tomato. In all mitogenomes, 9,598 bp of plastome sequences were found. Numerous nuclear copies of mitochondrial DNA (NUMTs) and plastid DNA (NUPTs) were observed in the S . lycopersicum and S . pennellii nuclear genomes. Several long organellar DNA fragments were tightly clustered in the nuclear genome; however, the NUMT and NUPT locations differed between the two species. Our results demonstrate the recent occurrence of frequent endosymbiotic gene transfers in tomato genomes.