文献类型：期刊文献

英文题名：A chromosome-scale genome assembly of Acacia melanoxylon provides new insights into its root nodule and heartwood formation

作者：Zhang, Ruping[1,5] Wang, Zhongyu[2] Zeng, Bingshan[1] Liu, Jun[2] Wang, Huan[3] Xie, Jianbo[4] Fan, Chunjie[1]

第一作者：Zhang, Ruping

通信作者：Fan, CJ[1];Wang, H[2];Xie, JB[3]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, State Key Lab Tree Genet & Breeding, Key Lab State Forestry Adm Trop Forestry, Guangzhou 510520, Peoples R China;[2]Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Resources & Genet Improvement, Beijing 100081, Peoples R China;[3]Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China;[4]Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Natl Engn Res Ctr Tree Breeding & Ecol Restorat, 35 Qinghua East Rd, Beijing 100083, Peoples R China;[5]Henan Acad Agr Sci, Henan Sesame Res Ctr, Zhengzhou 450003, Peoples R China

年份：2025

卷号：226

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20250717889387);Scopus(收录号：2-s2.0-85217825874);WOS:【SCI-EXPANDED(收录号:WOS:001428539500001)】；

基金：This work was financially supported by the National Key R & D Pro-gram of China during the 14th Five-year Plan Period (2022YFD2200205) and Forestry Science and Technology Innovation Project of Guangdong (2018KJCX004) . We are very grateful to Fagen Li (Tropical Forestry Research Institute of Chinese Academy of Forestry) for providing technical support when we analyze data.

语种：英文

外文关键词：Acacia melanoxylon; Whole genome; Transcriptome; Root nodulation; Heartwood formation

摘要：Acacia melanoxylon, commonly known as Blackwood, is a valuable commercial wood and an important ecological tree species owing to its high-quality appearance-grade heartwood products and nitrogen fixation ability. However, the lack of a complete genome sequence has hindered biological research and applied studies, especially in analyzing and exploring genes related in nodule and heartwood formation in Blackwood. Here, we present the first complete genome of the Acacia by combining Illumina, PacBio, BioNano and HiC sequencing technologies. This high-quality assembly encompasses a 680 Mb genome (scaffolds N50 = 6.66 Mb), which mapped onto 13 chromosome with 58.31 % repetitive sequences. Genome evolution analysis revealed that two whole-genome duplication events occurred in A. melanoxylon. The expansion of the WRKY and R (disease- resistance) gene families particularly WRKY47 and WRKY24, is linked to the Blackwood's strong adaptability. Additionally, the PHYB (Phytochrome B) and RR (response regulator) gene families which are critical for root nodulation, showed significant expansion and exhibited notably high expression in roots and root nodules. Moreover, genes involved in the flavonoid biosynthesis and lignin biosynthesis pathway, such as HCT, CCR, CAD, F3'H, and FGT, play crucial roles in heartwood formation in Blackwood. The high-quality genome will aid functional genetic research and accelerate molecular breeding on Acacia species. Furthermore, it provides new insights into the molecular mechanism underlying nodule and heartwood formation in woody plants.