Actinidia eriantha is one of the species of kiwifruit with a particularly high ascorbic acid (AsA) content.  However, the molecular mechanism driving AsA richness in fruit remains unclear.  In order to reveal the molecular mechanism of AsA richness in A. eriantha, this study constructed a regulatory network related to AsA metabolism by combining genomics, metabolomics and transcriptomics.  We assembled a high-quality genome of A. eriantha ‘Ganlv 1’ with only five remaining gaps.  The assembly is comprised of 29 pseudochromosomes with a total size of 615.95 Mb, and contig N50 of 20.35 Mb. Among them, 24 of the pseudochromosomes were obtained directly from telomere-to-telomere.  The LTR assembly index score and consensus quality value were 21.34 and 39.90%, respectively.  Subsequently, 61 metabolites and 2 092 genes were found to be differentially accumulated/expressed during fruit development by metabolome and transcriptome assays, respectively.  AsA metabolism and the cyclic regeneration pathway were found to have high expression levels throughout fruit growth and development, suggesting its crucial role in the regulation of AsA.  Furthermore, the AsA contents are highly associated with ascorbate peroxidase genes.  The genome obtained in this study provides genomic resources for the genetic and breeding research of A. eriantha, and the constructed regulatory network can provide a public data platform for future research on kiwifruit.

  Rapeseed (Brassica napus), is an important source of edible oil, animal fodder, vegetables, condiments and biodiesel, and plays a significant role in securing edible oil production worldwide. However, in countries with comparatively low levels of agricultural mechanization, such as China, increasing costs of labor and agricultural inputs are decreasing rapeseed profitability, and hence the area of rapeseed under cultivation. If the value of rapeseed crops is not further increased, the rapeseed growing area will continue to decrease, potentially jeopardizing oil production. Therefore, full exploitation of the existing and potential value of rapeseed is desirable. Different rapeseed products are already utilized in different ways, with more applications currently underutilized. As well as oil extraction from the seeds, the shoot and leaves can be used as vegetables, the roots to absorb soil cadmium for pollution remediation, the flowers for sightseeing and as a source of nectar, the pollen for extracting flavonoids and useful amino acids, the seeds/seed meal for extracting isthiocyanates and other important sulforaphane compounds, the straw and seed meal for fodder, and immature whole plants for green manure. This review summarizes recent research on ways to explore the potential holistic value of rapeseed, by taking the example of multifunctionality of rapeseed in China.