Project description:Michelia balansae var. balansae (Aug. Candolle) Dandy is a timber and spices species in Magnoliaceae, native to China and Vietnam. In this paper, the complete chloroplast genome (cpDNA) and basic annotated information were reported and its phylogenetic relationship with other species in Magnoliaceae was analyzed. The size of chloroplast genome of M. balansae var. balansae is 160,134 bp, which exhibited a typical quadripartite structure comprising a large single-copy (LSC) region of 88,161 bp and a small single-copy (SSC) region of 18,845 bp separated by a pair identical inverted repeat regions (IRs) of 26,564 bp each. The chloroplast genome contains 131 genes, including 86 protein-coding genes (PCGs), 37 transfer RNA (tRNA) genes and 8 ribosomal RNA (rRNA) genes. The phylogenetic analysis indicated that M. balansae var. balansae is most affinal to M. montana and they form a nomophyletic group with other 14 Michelia species. This Michelia clade is sister to the Aromadendron clade with high support. All genera mentioned in this analysis are nomophyletic under the system of Magnoliaceae by Sima and Lu.
Project description:Cryptocoryne is a popular ornamental aquatic plant for aquarists, although only six species are found in China. Destruction of the natural habitats of Cryptocoryne for human activities has led to a decline in its numbers. In this report, we sequenced and annotated the Cryptocoryne crispatula var. balansae chloroplast genome for the first time. Results showed that the length of the chloroplast genome was 182,935 bp and the GC content was 34%. The chloroplast genome encoded 137 genes, including 92 encoded protein genes, 37 tRNA genes, and 8 rRNA genes. Phylogenetic analysis supported the the monophyletic nature of the genus and indicated that it was the first species to be differentiated in the chloroplast genome of Cryptocoryne and formed a separate branch. These findings offer valuable genomic resources for comparative studies in Cryptocoryne and Araceae, thereby aiding genetic diversity and phylogenetic analyses.