Open Access

ARTICLE

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

WAN ZHANG^1,2,#, GUIYAN YANG^3,#, YUNLIN ZHAO¹, ZHENGGANG XU^1,2,3,*, HUANG HUIMIN¹, JIAKANG ZHOU¹

1 Hunan Research Center of Engineering Technology for Utilization of Environmental and Resources Plant, Central South University of Forestry and Technology, Changsha, 410004, China
2 Hunan Urban and Rural Ecological Planning and Restoration Engineering Research Center, Hunan City University, Yiyang, 413000, China
3 Key Laboratory of National Forestry and Grassland Administration on Management of Western Forest Bio-Disaster, College of Forestry, Northwest A&F University, Yangling, 712100, China

* Corresponding Author: ZHENGGANG XU. Email:
# These authors contributed equally to this work

BIOCELL 2022, 46(3), 803-819. https://doi.org/10.32604/biocell.2022.016984

Received 16 April 2021; Accepted 07 June 2021; Issue published 18 November 2021

Abstract

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

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Keywords

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