AUTHOR=Li Sicheng , Yang Cuifang , Wang Zhen , Xu Chaohua , Zhang Gemin , Huang Yuxin , Zhang Baoqing , Zhou Shan , Gao Yijing , Zong Wenyi , Duan Weixing , Yang Xiping 

TITLE=Assembly and comparative genome analysis of four mitochondrial genomes from Saccharum complex species

JOURNAL=Frontiers in Plant Science

VOLUME=15

YEAR=2024

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2024.1421170

DOI=10.3389/fpls.2024.1421170

ISSN=1664-462X

ABSTRACT=<p><italic>Saccharum</italic> complex includes genera <italic>Saccharum</italic>, <italic>Miscanthus</italic>, <italic>Erianthus</italic>, <italic>Narenga</italic>, and <italic>Tripidium</italic>. Since the <italic>Saccharum</italic> complex/Saccharinae constitutes the gene pool used by sugarcane breeders to introduce useful traits into sugarcane, studying the genomic characterization of the Saccharum complex has become particularly important. Here, we assembled graph-based mitochondrial genomes (mitogenomes) of four Saccharinae species (<italic>T. arundinaceum</italic>, E. rockii, <italic>M. sinensis</italic>, and <italic>N. porphyrocoma</italic>) using Illumina and PacBio sequencing data. The total lengths of the mitogenomes of <italic>T. arundinaceum</italic>, <italic>M. sinensis</italic>, <italic>E. rockii</italic> and <italic>N. porphyrocoma</italic> were 549,593 bp, 514,248 bp, 481,576 bp and 513,095 bp, respectively. Then, we performed a comparative mitogenomes analysis of Saccharinae species, including characterization, organelles transfer sequence, collinear sequence, phylogenetics analysis, and gene duplicated/loss. Our results provided the mitogenomes of four species closely related to sugarcane breeding, enriching the mitochondrial genomic resources of the Saccharinae. Additionally, our study offered new insights into the evolution of mitogenomes at the family and genus levels and enhanced our understanding of organelle evolution in the highly polyploid <italic>Saccharum</italic> genus.</p>