Ronald D. Smith
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View article: Calibration and In-flight Performance of DART’s Didymos Reconnaissance and Asteroid Camera for OpNav (DRACO)
Calibration and In-flight Performance of DART’s Didymos Reconnaissance and Asteroid Camera for OpNav (DRACO) Open
The Didymos Reconnaissance and Asteroid Camera for OpNav (DRACO) was the only instrument on board NASA’s Double Asteroid Redirection Test spacecraft. DRACO had a 2628.326 mm focal length Ritchey–Chrétien telescope with a 208.28 mm aperture…
View article: Population genetics of transposable element load: A mechanistic account of observed overdispersion
Population genetics of transposable element load: A mechanistic account of observed overdispersion Open
In an empirical analysis of transposable element (TE) abundance within natural populations of Mimulus guttatus and Drosophila melanogaster , we found a surprisingly high variance of TE count (e.g., variance-to-mean ratio on the order of 10…
View article: Endosperm-based incompatibilities in hybrid monkeyflowers
Endosperm-based incompatibilities in hybrid monkeyflowers Open
Endosperm is an angiosperm innovation central to their reproduction whose development, and thus seed viability, is controlled by genomic imprinting, where expression from certain genes is parent-specific. Unsuccessful imprinting has been l…
View article: Population genetics of transposable element load: a mechanistic account of observed overdispersion
Population genetics of transposable element load: a mechanistic account of observed overdispersion Open
In an empirical analysis of transposable element (TE) abundance within natural populations of Mimulus guttatus and Drosophila melanogaster , we found a surprisingly high variance of TE count (e.g., variance-to-mean ratio on the order of 10…
View article: Evolution of the genome-wide distribution of genes and transposons
Evolution of the genome-wide distribution of genes and transposons Open
Genomes exhibit a striking amount of complexity across a broad range of scales. This includes variation in the spatial distribution of features such as genes and transposable elements (TEs), which is observed both between species and among…
View article: Mechanisms driving endosperm-based hybrid incompatibilities: insights from hybrid monkeyflowers
Mechanisms driving endosperm-based hybrid incompatibilities: insights from hybrid monkeyflowers Open
Angiosperm endosperm requires genomic and epigenomic interactions between maternal and paternal genomes for proper seed development. Genomic imprinting, an epigenetic phenomenon where the expression of certain genes is predominantly contri…
View article: Subgenome Dominance in an Interspecific Hybrid, Synthetic Allopolyploid, and a 140-Year-Old Naturally Established Neo-Allopolyploid Monkeyflower
Subgenome Dominance in an Interspecific Hybrid, Synthetic Allopolyploid, and a 140-Year-Old Naturally Established Neo-Allopolyploid Monkeyflower Open
Recent studies have shown that one of the parental subgenomes in ancient polyploids is generally more dominant, having retained more genes and being more highly expressed, a phenomenon termed subgenome dominance. The genomic features that …
View article: A likelihood ratio test for changes in homeolog expression bias
A likelihood ratio test for changes in homeolog expression bias Open
Background: Gene duplications are a major source of raw material for evolution and a likely contributor to the diversity of life on earth. Duplicate genes (i.e., homeologs, in the case of a whole genome duplication) may retain their ancest…
View article: Subgenome dominance in an interspecific hybrid, synthetic allopolyploid, and a 140 year old naturally established neo-allopolyploid monkeyflower
Subgenome dominance in an interspecific hybrid, synthetic allopolyploid, and a 140 year old naturally established neo-allopolyploid monkeyflower Open
The importance and applications of polyploidy have long been recognized, from shaping the evolutionary success of flowering plants to improving agricultural productivity. Recent studies have shown that one of the parental subgenomes in anc…