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1. Identifying novel sources of resistance to wheat stem sawfly in five wild wheat species

   https://doi.org/10.1002/ps.8008  

   Peirce, Erika_S; Evers, Byron; Winn, Zachary_J; Raupp, W_John; Guttieri, Mary; Fritz, Allan_K; Poland, Jesse; Akhunov, Eduard; Haley, Scott; Mason, Esten; et al (February 2024, Pest Management Science)

   Abstract BACKGROUNDThe wheat stem sawfly (WSS,Cephus cinctus) is a major pest of wheat (Triticum aestivum) and can cause significant yield losses. WSS damage results from stem boring and/or cutting, leading to the lodging of wheat plants. Although solid‐stem wheat genotypes can effectively reduce larval survival, they may have lower yields than hollow‐stem genotypes and show inconsistent solidness expression. Because of limited resistance sources to WSS, evaluating diverse wheat germplasm for novel resistance genes is crucial. We evaluated 91 accessions across five wild wheat species (Triticum monococcum,T. urartu,T. turgidum,T. timopheevii, andAegilops tauschii) and common wheat cultivars (T. aestivum) for antixenosis (host selection) and antibiosis (host suitability) to WSS. Host selection was measured as the number of eggs after adult oviposition, and host suitability was determined by examining the presence or absence of larval infestation within the stem. The plants were grown in the greenhouse and brought to the field for WSS infestation. In addition, a phylogenetic analysis was performed to determine the relationship between the WSS traits and phylogenetic clustering. RESULTSOverall,Ae. tauschii,T. turgidumandT. urartuhad lower egg counts and larval infestation thanT. monococcum, andT. timopheevii.T. monococcum,T. timopheevii,T. turgidum, andT. urartuhad lower larval weights compared withT. aestivum. CONCLUSIONThis study shows that wild relatives of wheat could be a valuable source of alleles for enhancing resistance to WSS and identifies specific germplasm resources that may be useful for breeding. © 2024 The Authors.Pest Management Sciencepublished by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. 

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2. Contact-free wheat mildew detection with commodity wifi

   https://doi.org/10.1016/j.ijcce.2022.01.001  

   Hu, Pengming; Yang, Weidong; Wang, Xuyu; Mao, Shiwen (June 2022, International Journal of Cognitive Computing in Engineering)
3. Differential Synergistic Interactions among Four Different Wheat-infecting Viruses

   https://doi.org/10.3389/fmicb.2021.800318  

   Tatineni, S (December 2021, Frontiers in microbiology)

   Field-grown wheat (Triticum aestivum L.) plants can be co-infected by multiple viruses, including wheat streak mosaic virus (WSMV), Triticum mosaic virus (TriMV), brome mosaic virus (BMV), and barley stripe mosaic virus (BSMV). These viruses belong to four different genera in three different families and are, hence, genetically divergent. However, the impact of potential co-infections with two, three, or all four of them on the viruses themselves, as well as the wheat host, has yet to be examined. This study examined bi-, tri-, and quadripartite interactions among these viruses in wheat for disease development and accumulation of viral genomic RNAs, in comparison with single virus infections. Co-infection of wheat by BMV and BSMV resulted in BMV-like symptoms with a drastic reduction in BSMV genomic RNA copies and coat protein accumulation, suggesting an antagonism-like effect exerted by BMV toward BSMV. However, co-infection of either BMV or BSMV with WSMV or TriMV led to more severe disease than singly infected wheat, but with a decrease or no significant change in the titers of interacting viruses in the presence of BMV or BSMV, respectively. These results were in stark contrast with exacerbated disease phenotype accompanied with enhanced virus titers caused by WSMV and TriMV co-infection. Co-infection of wheat by WSMV, TriMV, and BMV or BSMV resulted in enhanced synergistic disease accompanied with increased accumulation of TriMV and BMV but not WSMV or BSMV. Quadripartite interactions in co-infected wheat by all four viruses resulted in very severe disease synergism, leading to the death of most infected plants, but paradoxically, a drastic reduction in BSMV titer. Our results indicate that interactions among different viruses infecting the same plant host are more complex than previously thought, do not always entail increases in virus titers, and likely involve multiple mechanisms. These findings lay the foundation for additional mechanistic dissections of synergistic interactions among unrelated plant viruses. 

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4. Origin and evolution of the bread wheat D genome

   https://doi.org/10.1038/s41586-024-07808-z  

   Cavalet-Giorsa, Emile; González-Muñoz, Andrea; Athiyannan, Naveenkumar; Holden, Samuel; Salhi, Adil; Gardener, Catherine; Quiroz-Chávez, Jesús; Rustamova, Samira M; Elkot, Ahmed Fawzy; Patpour, Mehran; et al (September 2024, Nature)
5. Metabolomics of wheat grains generationally-exposed to cerium oxide nanoparticles

   https://doi.org/10.1016/j.scitotenv.2019.136487  

   Rico, Cyren M.; Wagner, Dane; Abolade, Oluwasegun; Lottes, Brett; Coates, Kameron (April 2020, Science of The Total Environment)