A highly contiguous mitochondrial and plastid genome sequences of a japonica rice cultivar, Taichung 65, were determined by a hybrid approach with long- and short-read sequences. The assembled mitochondrial genome was 465,453 bases in length with an overall GC content of 43.8%. It was predicted to harbor 62 protein-encoding genes, 16 kinds (33 copies) of transfer RNA, and three kinds (six copies) of ribosomal RNA genes. The mitochondrial genome structure in Taichung 65 is largely the same as that of Nipponbare, but the first ∼9.5 kb sequence in Nipponbare (DQ167400) is replaced with a ∼27 kb sequence duplicated from other parts of the mitochondrial genome. Phylogenetic and sequence polymorphism analysis indicated that Taichung 65 is classified as typical japonica. The assembled plastid genome sequence was 134,551 bases in length and completely identical to the previously reported Nipponbare sequence. These near-complete organelle genome sequences will serve as fundamental resources for investigating alloplasmic cytoplasmic male sterile lines and other organelle-controlled phenomena in rice.
Keywords: Oryza sativa ssp. japonica; Taichung 65; mitochondrial genome; plastid genome; rice cultivar.
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