Publications by authors named "F Vear"
Article Synopsis
- Researchers have identified and mapped 22 major resistance genes against downy mildew in sunflowers, but only a few have been widely used in crops, leading to the emergence of new virulent pathotypes.
- A study analyzed 12 novel resistant sources from wild species and ecotypes, all effective against 16 downy mildew pathotypes, and mapped their resistance genes on the sunflower reference genome.
- The research identified ten potentially new resistance genes and physically mapped them alongside previously reported ones, marking the first large-scale mapping of these genes in sunflowers and discussing nomenclature for future sequencing efforts.
Over the last 40 years, new sunflower downy mildew isolates (Plasmopara halstedii) have overcome major gene resistances in sunflower, requiring the identification of additional and possibly more durable broad-spectrum resistances. Here, 354 RXLR effectors defined in silico from our new genomic data were classified in a network of 40 connected components sharing conserved protein domains. Among 205 RXLR effector genes encoding conserved proteins in 17 P.
View Article and Find Full Text PDFPrediction of hybrid performance using incomplete factorial mating designs is widely used in breeding programs including different heterotic groups. Based on the general combining ability (GCA) of the parents, predictions are accurate only if the genetic variance resulting from the specific combining ability is small and both parents have phenotyped descendants. Genomic selection (GS) can predict performance using a model trained on both phenotyped and genotyped hybrids that do not necessarily include all hybrid parents.
View Article and Find Full Text PDFArticle Synopsis
- The domesticated sunflower, known as Helianthus annuus L., shows potential for climate change adaptation due to its ability to produce stable yields under varying environmental conditions, including drought.
- Researchers have created a high-quality reference for the sunflower genome, covering 3.6 gigabases, which includes insights into its evolutionary history and whole-genome duplications that occurred millions of years ago.
- This work enables the development of gene networks linked to key traits like flowering time and oil metabolism, setting the stage for future improvements in sunflower resilience and oil production relevant to agricultural and nutritional needs.
SNP genotyping of 114 cultivated sunflower populations showed that the multiplication process and the main traits selected during breeding of sunflower cultivars drove molecular diversity of the populations. The molecular diversity in a set of 114 cultivated sunflower populations was studied by single-nucleotide polymorphism genotyping. These populations were chosen as representative of the 400 entries in the INRA collection received or developed between 1962 and 2011 and made up of land races, open-pollinated varieties, and breeding pools.
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