Publications by authors named "Graham J Scoles"
Article Synopsis
- The Un8 gene in barley provides resistance against the Ustilago nuda pathogen, responsible for true loose smut, and is located on the long arm of chromosome 5.
- Recent genetic studies have narrowed the location of the Un8 gene to a small interval on chromosome 1HL, using a population of 4625 segregating lines.
- Analysis of the candidate gene from resistant versus susceptible barley lines revealed specific amino acid variations in the deduced protein that might contribute to the loss of function in susceptible lines.
Article Synopsis
- Genomic research in oats faces challenges due to limited shared genetic markers, leading this study to create over 2,000 new genetic markers using Diversity Array Technology (DArT) for oat improvement.
- Around 19,000 genomic clones were sourced from 60 oat varieties globally, resulting in a significant number of polymorphic markers being identified, with some linked to known gene sequences.
- The new markers enhanced genetic mapping and analysis of oat diversity, revealing important clusters related to the growth type (spring vs. winter) and breeding programs, thereby laying groundwork for future oat breeding initiatives.
ABSTRACT Genetic control of avirulence in the net blotch pathogen, Pyrenophora teres, was investigated. To establish an appropriate study system, a collection of 10 net form (P. teres f.
View Article and Find Full Text PDFFreezing tolerance in plants develops through acclimation to cold by growth at low, above-freezing temperatures. Wheat is one of the most freezing-tolerant plants among major crop species and the wide range of freezing tolerance among wheat cultivars makes it an excellent model for investigation of the genetic basis of cold tolerance. Large numbers of genes are known to have altered levels of expression during the period of cold acclimation and there is keen interest in deciphering the signaling and regulatory pathways that control the changes in gene expression associated with acquired freezing tolerance.
View Article and Find Full Text PDFArticle Synopsis
- A molecular mapping study of cultivated oats was performed to enhance an earlier reference map created from a specific oat population cross.
- The researchers scored 607 new genetic markers and worked with a larger group of recombinant inbred lines to develop an updated, detailed framework for mapping these markers.
- This new framework integrates findings from earlier studies, offering a valuable resource for oat researchers focused on various aspects of genetics and breeding.
Flavonoid differences between near-isogenic lines of yellow- and brown-seeded Brassica carinata were used to identify a genetic block in seed coat and seedling leaf pigment biosynthesis. Seed coat pigment in the brown-seeded line consisted of proanthocyanidins (condensed tannins), while anthocyanin was absent. Dihydroquercetin, dihydrokaempferol, quercetin and kaempferol accumulated only in the mature seed coat of the yellow-seeded line, indicating dihydroflavonol reductase (DFR) as an element of genetic control in pigment biosynthesis.
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