Pennisetum flaccidum Genome sequencing and assembly

Pennisetum flaccidum Grisebach is a typical high-quality forage and drought-tolerant grass. In the present study, we firstly reported the complete chloroplast genome of P. flaccidum, which was 138,336 bp in length, including a pair of inverted repeats (IR:22,293 bp), a large single copy (LSC: 81,328 bp), and a small single copy (SSC: 12,422 bp) region. 131 genes were annotated, containing 7 rRNA genes, 37 tRNA genes, and 87 protein-coding genes. The GC content of the chloroplast genome was 45.86%. The Maximum likelihood phylogenetic tree indicated that P. flaccidum may be closely related to Setaria within the family of Poaceae.

白草（Pennisetum flaccidum Grisebach）是一种典型的优质饲用牧草与耐旱草本植物。本研究首次报道了白草的完整叶绿体基因组，其全长为138336 bp，包含一对反向重复序列（IR：22293 bp）、一个大单拷贝区（LSC：81328 bp）与一个小单拷贝区（SSC：12422 bp）。该基因组共注释得到131个基因，其中包括7个核糖体RNA（rRNA）基因、37个转运RNA（tRNA）基因以及87个蛋白编码基因。其叶绿体基因组的GC含量为45.86%。最大似然系统发育树分析结果显示，白草隶属于禾本科（Poaceae），且与狗尾草属（Setaria）植物亲缘关系较近。