Location: Cereal Crops ResearchTitle: Mapping and characterization of yield component traits in cultivated emmer and durum wheat
|PETERS HAUGRUD, AMANDA - North Dakota State University|
|GREEN, ANDREW - North Dakota State University|
Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/12/2020
Publication Date: 1/13/2020
Citation: Peters Haugrud, A.R., Green, A.J., Xu, S.S., Faris, J.D. 2020. Mapping and characterization of yield component traits in cultivated emmer and durum wheat [abstract]. Plant and Animal Genome Conference XXVIII. PO0925.
Technical Abstract: To date, numerous studies have identified yield component genes in hexaploid (Triticum aestivum) wheat; however, fewer yield evaluation studies have been performed in tetraploid wheat. A potential source for allelic variation for wheat improvement is cultivated emmer (T. turgidum ssp. dicoccum). Here we evaluated a recombinant inbred line population (BP025) derived from crossing the durum (T. turgidum ssp. durum) wheat variety Ben by the cultivated emmer accession PI 41025. The BP025 population was grown under field conditions at Prosper, North Dakota in the summers of 2017, 2018, and 2019. During the 2017 and 2018 seasons, 50 unique QTL have been identified for yield component traits such as spikelets per spike, kernels per spike (KPS), grain weight per spike (GWS), thousand kernel weight, and seed morphology traits. A significant QTL on chromosome 2B for KPS and GWS contributed up to 14% and 11% of the phenotypic variation for KPS and GWS, respectively. Currently, this QTL spans a 38 Mb region at the 445-483 Mb position on the durum Svevo reference sequence. We developed 24 markers for the target region and mapped them in F3 homozygous recombinant individuals. The F4 plants from each of the recombinant families will be phenotyped to narrow the target region through high-resolution mapping. The cloning of this QTL will provide fundamental knowledge regarding the genetic mechanisms controlling yield and provide additional tools for breeders to expedite the development of high-yielding varieties.