To fully evaluate jujube germplasm, we sampled sour jujubes both from Las Cruces, NM and western Texas to examine their fruit and seed metabolomic profiles to facilitate further employment of those jujube germplasm trees. Samples were taken from the NMSU campus and Tornillo/Fabens, TX which had both the wild type and middle types (cross between wild ones and cultivars). Jujube germplasm fruit metabolomic profile reveals that jujube cultivar samples were similar to germplasm samples from Texas. Sour jujube samples in NM were separated from sour jujube from TX. Sour jujube in TX were mingled together with Cross in TX. So-called Cross and sour jujube were arbitrary classifications. Without cultivars, germplasm was separated by location NM vs TX, not by sour jujube or Cross. For significant compounds, there were only 110 significant different compounds between TX sour jujube vs Cross, while Cross vs NM sour jujube, TX sour jujube vs NM sour jujube or TX vs NM, had over 700. TXS and Cross group overlaid and NM group was totally separated from the other two groups. TX samples had significantly higher contents of large numbers of amino acids and derivatives. More compounds were identified from seed samples and their grouping/PCA results were similar to fruit metabolomic results. Cross samples were mixed together with TX sour jujubes and NM sour jujubes were separated from TX samples. New Mexico samples in Las Crues near graduate student housing area were planted at similar time which could be from one nursery, closed related to each other. Texas germplasm was the result of human selection, not the original sour jujubes but cross between sour jujubes or sour jujube and cultivar-like germplasm. The dominant triterpenes were different between fruit and seeds. In fruit flesh, pomolic acid was the dominant one with Honeyjar as the highest, followed by rutundic acid, Cleanothic acid, 2,3,23-Trihydroxyurs-12-en-28-oic acid, 2,3,23-Trihydroxyolean-12-en-28-oic acid, madasiatic acid, which were higher for NM samples than TX samples. In seeds, the dominant triterpenes were oleanolic acid, mangiferotic acid, momordicoside I aglycone, 3,13,15-trihydroxyolenonane-12-one, jujubogenin, and pomolic acid. The contents of the first three metabolites were equivalent and much higher than the rest, ranging from 0.5X108 to 1.5x108 depending on germplasm. Pomolic acid was much lower in seeds than in fruit. The data contained over 1600 metabolites in fruit and over 2000 for seeds which would be good references for future utilization of those jujube germplasm for horticultural or pharmaceutical purposes.
