Location: Cereal Crops ResearchTitle: Genetic architecture of panicle archetypes in ten diverse oat (Avena sativa) mapping populations
|NAZARENO, ERIC - University Of Minnesota|
|NARAGHI, SEPEHR - North Dakota State University|
|ARDAYFIO, NAA - North Dakota State University|
|MCMULLEN, MICHAEL - North Dakota State University|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 12/15/2021
Publication Date: 1/10/2022
Citation: Carlson, C.H., Fiedler, J.D., Nazareno, E.S., Naraghi, S.M., Ardayfio, N.K., Mcmullen, M., Kianian, S. 2022. Genetic architecture of panicle archetypes in ten diverse oat (Avena sativa) mapping populations [abstract]. Plant and Animal Genome Conference XXIX. Poster No.0355.
Technical Abstract: Oat (Avena spp.) is genetically diverse, comprising of dozens of species of varying ploidy levels. Common oat (Avena sativa) is the primary allohexaploid species grown as a source of food, feed, and cosmetics. The genome is rather large (11-15 GB) and consists of three subgenomes (A, B, and D), of which there naturally exists a substantial amount of structural variation. Wild diploid, tetraploid, and cultivated hexaploid genomes have been sequenced and annotated, providing the oat research community practical tools to improve this burgeoning cereal crop. Oat is considered a heart healthy food because of its high ß-glucan content. It is also high in protein content and other unique chemical compounds, such as avenanthramides. The primary barrier to increased market share is grower hesitancy; specifically, the volatility of oat yields, due to rapidly evolving fungal diseases, like oat crown rust (Puccinia coronata f. sp. avenae). Plant breeders have focused largely on improving resistance to foliar diseases, test weight, and yield. What has been loosely evaluated are the morphometric relationships of these important characteristics with panicle architecture. Modulation of panicle architecture to optimize yield has not been investigated in oat. To understand the variation in panicle architecture and loci associated with panicle traits, ten diverse biparental populations (n=2,800) were evaluated in the field and genotyped via genotyping-by-sequencing. Panicles from all lines were scanned and analyzed using novel image analysis techniques, resulting in a total of 30 panicle traits. Heading date was correlated with many panicle traits and used as a covariate to control for differences in germination and phenology. Within and among family variation for panicle traits suggest that most are highly heritable and share associations with numerous high-effect loci. Candidate genes, markers, and future directions are discussed. This work adds to growing genomics and phenomics resources for oat and provides a unique perspective on the genetic basis of panicle archetypes.