Abstract
Jasmine [
Jasminum sambac
(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
J. sambac
cultivar ‘Danbanmoli’ (JSDB, a single-petal phenotype). We showed that the final genome of
J. sambac
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
J. sambac
genome has undergone only an ancient whole-genome duplication (WGD) event. We estimated that the lineage that has given rise to
J. sambac
diverged from the lineage leading to
Osmanthus fragrans
and
Olea europaea
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
J. sambac
genome, we identified a total of 122 MYB, 122 bHLH and 69 WRKY genes. Our assembled
J. sambac
JSDB genome provides fundamental knowledge to study the molecular mechanism of heat stress tolerance, and improve jasmine flowers and dissect its fragrance.