Abstract
Sandalwood (Santalum album L.) is a valuable commodity in the international trade due to its use in fragrance and essential oil industries. In the present study, a draft genome of S. album representing the natural population from Kerala, India, was sequenced and assembled into 74,900 major scaffolds with N50 of 12,068 bp and the estimated genome size was 286 Mb. A total of 37,500 genes were predicted including 30 genes from terpene synthase gene family. Repetitive sequence was mined and spanned 12.52% of the sandalwood genome. Domain analysis of predicted proteins revealed that transcription factors and kinases were the major category of proteins followed by ARM repeat proteins and WD domain proteins. The draft genome encoded for 574 miRNAs belonging to 23 families including two miRNAs associated with terpenoid biosynthesis pathway. Further, the consensus chloroplast genome of 147.25 kb size was reconstructed and phylogenetic analysis with 40 plastid genes grouped members of Santalales with Asterids in accordance with its taxonomic status recommended in APG III and APG IV. Variant calling was conducted against the published genome and a total of 1,191,838 (0.42%) SNPs and 98,312 (0.034%) InDels were predicted in the present genome. The draft genome presented in this study has provided additional genomic resource for S. album for subsequent research in population diversity estimation and accelerated trait breeding in this species.
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