Location: Cereal Crops ResearchTitle: Genetic analysis of stable yield component QTL in tetraploid wheat
|PETERS HAUGRUD, AMANDA - Oak Ridge Institute For Science And Education (ORISE)|
|ZHANG, QIJUN - North Dakota State University|
|GREEN, ANDREW - North Dakota State University|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 9/16/2022
Publication Date: 10/26/2022
Citation: Peters Haugrud, A., Zhang, Q., Green, A., Xu, S.S., Faris, J.D. 2022. Genetic analysis of stable yield component QTL in tetraploid wheat [abstract]. From Seed to Pasta IV. p.8.
Technical Abstract: Few studies have been conducted to identify alleles for yield improvement in close relatives of durum wheat (Triticum turgidum subsp. durum). Cultivated emmer (T. turgidum subsp. dicoccum) is a close relative of durum potentially useful for this purpose. Here, we evaluated three populations of recombinant inbred lines derived from crosses between elite durum wheat varieties and cultivated emmer wheat accessions under field conditions to identify quantitative trait loci (QTL) associated with eleven yield component and seed morphology traits. QTL associated with each of these traits were identified on every chromosome. The previously cloned genes Ppd-B1, Q, Vrn1-B1, WAPO-A1, GNI1-A1, Vrn1-A1, ELF3, Vrn2, and FT-1 were all consistently associated with multiple traits across environments with the beneficial alleles for some coming from cultivated emmer and for others coming from the elite durum parent. Eleven stable QTL, which was defined as those expressed in multiple environments and multiple populations, were observed. These included QTL for days to heading at the Vrn-A1 and FT-1 loci, spikelets per spike at the Q locus, plant height at FT-1, and kernel size and dimension at Q and regions of chromosomes 2A, 3A, and 3B. For eight of the stable QTL, the beneficial alleles in at least one of the populations were contributed by the cultivated emmer parent. Individual RILs that had superior yield components compared to the elite durum parents were identified from each population. These lines along with the knowledge of robust and stable yield-associated QTL and associated markers, provide useful resources for future breeding endeavors to introgress beneficial alleles into elite germplasm for durum wheat improvement.