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Arcila-Galvis, Juliana E; Arango, Rafael E; Torres-Bonilla, Javier M; Arias, Tatiana
Life, 03/2021, Letnik: 11, Številka: 3Journal Article
Mycosphaerellaceae is a highly diverse fungal family containing a variety of pathogens affecting many economically important crops. Mitochondria play a crucial role in fungal metabolism and in the study of fungal evolution. This study aims to: (i) describe the mitochondrial genome of , and (ii) compare it with closely related species ( , , and ) available online, paying particular attention to the Sigatoka disease's complex causal agents. The mitochondrial genome of is a circular molecule of 74,089 bp containing typical genes coding for the 14 proteins related to oxidative phosphorylation, 2 rRNA genes and a set of 38 tRNAs. mitogenome has two truncated copies, and bicistronic transcription of and confirmed experimentally. Comparative analysis revealed high variability in size and gene order among selected Mycosphaerellaceae mitogenomes likely to be due to rearrangements caused by mobile intron invasion. Using fossil calibrated Bayesian phylogenies, we found later diversification times for Mycosphaerellaceae (66.6 MYA) and the Sigatoka disease complex causal agents, compared to previous strict molecular clock studies. An early divergent split from the sister species + 13.31 MYA while their sister group, the sister species and split from their shared common ancestor in the late Miocene 8.22 MYA. This newly dated phylogeny suggests that species belonging to the Sigatoka disease complex originated after wild relatives of domesticated bananas (section Eumusae; 27.9 MYA). During this time frame, mitochondrial genomes expanded significantly, possibly due to invasions of introns into different electron transport chain genes.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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