S. Knapp

Publications245
h-index64
Citations12,921
Highly Influential Citations883
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Systemic Endopolyploidy in Arabidopsis thaliana.
Microfluorometric analysis of the nuclear DNA contents of the somatic tissues of Arabidopsis thaliana has revealed extensive endoreduplication, resulting in tissues that comprise mixtures of…
Simple sequence repeat map of the sunflower genome
TLDR
The SSR markers described herein supply a critical mass of DNA markers for constructing genetic maps of sunflower and create the basis for unifying and cross-referencing the multitude of genetic maps developed for wild and cultivated sunflowers.
Towards a Saturated Molecular Genetic Linkage Map for Cultivated Sunflower
TLDR
The goal of the present research was to increase the density of the sunflower map by constructing a new RIL map (PHA X PHB) based on SSRs, adding loci for newly developed SSR markers to the RHA280 × RHA801 Ril map, and integrating the restriction fragment length polymorphism (RFLP) and SSR maps of sunflower.
Quantitative trait locus effects and environmental interaction in a sample of North American barley germ plasm
Quantitative trait locus (QTL) and QTL x environment (E) interaction effects for agronomic and malting quality traits were measured using a 123-point linkage map and multi-environment phenotype data…
Multiple paleopolyploidizations during the evolution of the Compositae reveal parallel patterns of duplicate gene retention after millions of years.
TLDR
It is suggested that paleopolyploidy can yield strikingly consistent signatures of gene retention in plant genomes despite extensive lineage radiations and recurrent genome duplications but that these patterns vary substantially among higher taxonomic categories.
A molecular, isozyme and morphological map of the barley (Hordeum vulgare) genome
A map of the barley genome consisting of 295 loci was constructed. These loci include 152 cDNA restriction fragment length polymorphism (RFLP), 114 genomic DNA RFLP, 14 random amplified polymorphic…
The sunflower genome provides insights into oil metabolism, flowering and Asterid evolution
TLDR
It is found that the genomic architecture of flowering time has been shaped by the most recent whole-genome duplication, which suggests that ancient paralogues can remain in the same regulatory networks for dozens of millions of years.
Exact Confidence Intervals for Heritability on a Progeny Mean Basis1
TLDR
This research developed a measure of precision for H for certain balanced linear models for heritability on a progeny mean basis for sorghum half-sib family data.
Genetic analysis of sunflower domestication.
TLDR
On the basis of the directionality of QTL, strong directional selection for increased achene size appears to have played a central role in sunflower domestication, and none of the other traits show similar evidence of selection.
PCR-multiplexes for a genome-wide framework of simple sequence repeat marker loci in cultivated sunflower
TLDR
The development of PCR-multiplexes for a nearly genome-wide framework of 78 SSR marker loci in cultivated sunflower is described herein, and the multiplexed SSR markers create a 'standard genotyping' set ideal for first-pass scans of the genome, as are often needed when screening bulked-segregant DNA samples or mapping phenotypic trait loci.
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