The chloroplast genome comparative characteristic of artificial breeding tree, a case about Broussonetia kazinoki �Broussonetia papyrifera

Broussonetia kazinoki × papyrifera (ZJGS) is a hybrid species in Moraceae family, which has very complicated origin. The excellent characteristics of fast growth, strong soil and water conservation ability, high leaf protein content stem fiber ZJGS make it both ecological benefits the mining area economically valuable. This study aims to further understand other taxa through chloroplast (cp) genome structure comparison with 12 closely related species. Among 13 species, cp length seven (ranges from 160,239 bp 162,594 bp) larger than that six Morus 158,459 159,265 bp). 77 shared protein-coding genes (PCGs) obvious positive selection Ka/Ks ratios acted on petD rpl16 B. papyrifera, respectively. Phylogenetic analysis based PCGs 28 shows maternal kazinoki. These findings provide data support for origin hybridization genomic resources future resource development molecular breeding.