The chromosome-scale genome of black wolfberry(Lycium ruthenicum)provides useful genomic resources for identifying genes related to anthocyanin biosynthesis and disease resistance  

作  者:Gulbar Yisilam Enting Zheng Chuanning Li Zhiyong Zhang Ying Su Zhenzhou Chu Pan Li Xinmin Tian 

机构地区:[1]Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Ministry of Education)&Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin,Guangxi Normal University,Guilin 541006,China [2]Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi 830046,China [3]Laboratory of Systematic&Evolutionary Botany and Biodiversity,College of Life Sciences,Zhejiang University,Hangzhou 310058,China [4]Guangxi University Enginering Research Center of Bioinformation and Genetic Improvement of Speciaty Crops,Guangxi Normal University,Guilin 541006,China

出  处:《Plant Diversity》2025年第2期201-213,共13页植物多样性(英文版)

基  金:supported by the National Natural Science Foundation of China(32360058);the Central Government Guides Local Science and Technology Development Projects,China(2023ZYZX1224);Xinjiang University Excellent Doctoral Student Innovation Project(XJU2022BS051)。

摘  要:The black wolfberry(Lycium ruthenicum;2n=2x=24)is an important medicinal plant with ecological and economic value.Its fruits have numerous beneficial pharmacological activities,especially those of anthocyanins,polysaccharides,and alkaloids,and have high nutritional value.However,the lack of available genomic resources for this species has hindered research on its medicinal and evolutionary mechanisms.In this study,we developed the telomere-to-telomere(T2T)nearly gapless genome of L.ruthenicum(2.26 Gb)by integrating PacBio HiFi,Nanopore Ultra-Long,and Hi-C technologies.The assembled genome comprised 12 chromosomes with 37,149 protein-coding genes functionally annotated.Approximately 80%of the repetitive sequences were identified,of which long terminal repeats(LTRs)were the most abundant,accounting for 73.01%.The abundance of LTRs might be the main reason for the larger genome of this species compared to that of other Lycium species.The species-specific genes of L.ruthenicum were related to defense mechanisms,salt tolerance,drought resistance,and oxidative stress,further demonstrating their superior adaptability to arid environments.Based on the assembled genome and fruit transcriptome data,we further constructed an anthocyanin biosynthesis pathway and identified 19 candidate structural genes and seven transcription factors that regulate anthocyanin biosynthesis in the fruit developmental stage of L.ruthenicum,most of which were highly expressed at a later stage in fruit development.Furthermore,154 potential disease resistance-related nucleotidebinding genes have been identified in the L.ruthenicum genome.The whole-genome and proximal,dispersed,and tandem duplication genes in the L.ruthenicum genome enriched the number of genes involved in anthocyanin synthesis and resistance-related pathways.These results provide an important genetic basis for understanding genome evolution and biosynthesis of pharmacologically active components in the Lycium genus.

关 键 词:Lycium ruthenicum GENOME Anthocyanin biosynthesis Gene duplication Comparative genomics 

分 类 号:O62[理学—有机化学]

 

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