AUTHOR=Qi Xiangyu , Wang Huadi , Chen Shuangshuang , Feng Jing , Chen Huijie , Qin Ziyi , Blilou Ikram , Deng Yanming 

TITLE=The genome of single-petal jasmine (Jasminum sambac) provides insights into heat stress tolerance and aroma compound biosynthesis

JOURNAL=Frontiers in Plant Science

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1045194

DOI=10.3389/fpls.2022.1045194

ISSN=1664-462X

ABSTRACT=<p>Jasmine [<italic>Jasminum sambac</italic> (L.) Aiton] is a commercially important cultivated plant species known for its fragrant flowers used in the perfume industry, medicine and cosmetics. In the present study, we obtained a draft genome for the <italic>J. sambac</italic> cultivar ‘Danbanmoli’ (JSDB, a single-petal phenotype). We showed that the final genome of <italic>J. sambac</italic> was 520.80 Mb in size (contig N50 = 145.43 kb; scaffold N50 = 145.53 kb) and comprised 35,363 genes. Our analyses revealed that the <italic>J. sambac</italic> genome has undergone only an ancient whole-genome duplication (WGD) event. We estimated that the lineage that has given rise to <italic>J. sambac</italic> diverged from the lineage leading to <italic>Osmanthus fragrans</italic> and <italic>Olea europaea</italic> approximately 31.1 million years ago (Mya). On the basis of a combination of genomic and transcriptomic analyses, we identified 92 transcription factors (TFs) and 206 genes related to heat stress response. Base on a combination of genomic, transcriptomic and metabolomic analyses, a range of aroma compounds and genes involved in the benzenoid/phenylpropanoid and terpenoid biosynthesis pathways were identified. In the newly assembled <italic>J. sambac</italic> genome, we identified a total of 122 MYB, 122 bHLH and 69 WRKY genes. Our assembled <italic>J. sambac</italic> JSDB genome provides fundamental knowledge to study the molecular mechanism of heat stress tolerance, and improve jasmine flowers and dissect its fragrance.</p>