查看文章

Cotton is a major crop that provides the most important renewable textile fibers in the world. Studies of the taxonomy and evolution of cotton species have received wide attentions, not only due to cotton’s economic value but also due to the fact that Gossypium is an ideal model system to study the origin, evolution, and cultivation of polyploid species. Previous studies suggested the involvement of mitochondrial genome editing sites and copy number as well as mitochondrial functions in cotton fiber elongation. Whereas, with only a few mitogenomes assembled in the cotton genus Gossypium, our knowledge about their roles in cotton evolution and speciation is still scarce. To close this gap, here we assembled 20 mitogenomes from 15 cotton species spanning all the cotton clades (A–G, K, and AD genomes) and 5 cotton relatives using short and long sequencing reads. Systematic analyses uncovered a high level of …