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Macadamia is a high value nut crop that is recently domesticated, ideal for testing the effect of artificial selection. Here, we sequence the genome of Hawaiian cultivar ‘Kau’ and assemble into 794 Mb in 14 pseudo-chromosomes with 37,728 genes. Genome analysis reveals a whole-genome duplication event, occurred 46.8 million years ago. Gene expansions occurred in gene families involves in fatty acid biosynthesis. Gene duplication of MADS-Box transcription factors in proanthocyanidin biosynthesis are relevant for seed coat development. Genome re-sequencing of 112 accessions reveals the origin of Hawaiian cultivars from Mount Bauple in southeast Queensland in Australia. Selective sweeps are detected in macadamia cultivars, including genes involved in fatty acid biosynthesis, seed coat development, and heat stress response. Such strong effects of artificial selection in few generations reveals the genomic basis for ‘one-step operation’ for clonal crop domestication. The knowledge gained could accelerate domestication of new crops from wild species.

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The densities and viscosities of ethyl heptanoate and ethyl octanoate were measured at temperatures ranging from 303 to 353 K and at pressures ranging from 0.1 to 15 MPa. The expanded uncertainties of density and the relative expanded uncertainty of viscosity are better than 5 kg·m–3 and 0.015, respectively. Experimental results show that the densities and viscosities of the two fatty acid ethyl esters increase with the increasing pressure and decrease with the increasing temperature. The density data were correlated using the Tait equation, and the viscosity data were correlated using the Andrade–Tait model. The average absolute relative deviations between the experimental data and the calculated results for the densities and viscosities were less than 0.03% and 0.47%, respectively.