Chromosome-scale assemblies of , and provide insights into the evolution of genomes.

is a large and diverse tree genus in the Myrtaceae family. Genome assemblies for clove (, 370 Mb) and sea apple (, 405 Mb) provided the first insights into the genomic features and evolution of the genus. Here, we present additional chromosome-scale genome assemblies for , and Genome profiling analyses show that , like and , is diploid (2n = 2x = 22), while the , , and specimens are autotetraploid (2n = 4x = 44).

Absolute prediction of relative changes in contrast sensitivity with aberrations using a single metric of retinal image quality.

Metrics of retinal image quality predict optimal refractive corrections and correlate with visual performance. To date, they do not predict absolutely the relative change in visual performance when aberrations change and therefore need to be a-posteriori rescaled to match relative measurements. Here we demonstrate that a recently proposed metric can be used to predict, in an absolute manner, changes in contrast sensitivity measurements with Sloan letters when aberrations change.

Natural and induced variations in transcriptional regulator genes result in low-nicotine phenotypes in tobacco.

In tobacco, the homologous ETHYLENE RESPONSE FACTOR (ERF) transcription factors ERF199 and ERF189 coordinate the transcription of multiple metabolic genes involved in nicotine biosynthesis. Natural alleles at the NIC1 and NIC2 loci greatly affect alkaloid accumulation and overlap with ERF199 and ERF189 in the tobacco genome, respectively. In this study, we identified several low-nicotine tobacco varieties lacking ERF199 or ERF189 from a tobacco germplasm collection.