@article{sackey_boyle_xiong_rios_arola_sackey_barnett_2019, title={Perspectives on Cultural and Posthumanist Rhetorics}, volume={38}, ISSN={["1532-7981"]}, DOI={10.1080/07350198.2019.1654760}, abstractNote={Cultural rhetorics (CR) as a term has been used since at least the 1960s in disciplines ranging from anthropology, literature, linguistics, TESOL, speech communication, and cultural studies. In 1968, Huber W. Ellingsworth defined cultural rhetorics as “the communication styles of a particular culture, including appropriate themes, modes of expression, standards, purposes, sources, and receivers of communication” (35). CR as an area of disciplinary inquiry did not gain much interest until Steven Mailloux theorized the role of rhetoric both in cultural criticism and shaping the future of the humanities in Reception Histories. Mailloux defines CR as “the study of the political effectivity of trope, argument, and narrative in culture” that is deeply embedded in “the conditions, purposes, activities, and results of the disciplinary production of knowledge, especially within academic institutions such as the U.S. university” (Reception 154; 186). In the two decades that have passed since Mailloux’s initial work, CR has assumed different scholarly orientations. As CR interfaces with other disciplines and theories, how it is practiced, its objects of inquiry, and even its goals change. For instance, a deep engagement with indigenous studies orients scholars affiliated with the Cultural Rhetorics Theory Lab (CRTL) to emphasize an engagement with decolonization and decolonial practices as central to the work of cultural rhetorics scholars. Cushman et al.’s recent symposium in Rhetoric Review on decolonial rhetoric pushes against this limiting definition. Specifically, the authors note the ways in which defining cultural rhetorics via American Indian rhetorics can frame decolonial scholarship as a Native rhetorics concern rather than a broader scholarly commitment designed to contend with marginalization and injustice across the colonial matrix of power. Their attention to decolonial rhetorics provides a foundation for how scholars—who identify as cultural rhetoricians, posthumanists, or some combination of both—might work through productive tensions to produce pluriversal possibilities that are not totalizing and “more representative and responsive to the lived realities of all people” (Cushman et al., “Decolonizing Projects” 2). There is no single way to define CR. As Phil Bratta and Malea Powell articulate in “Entering the Cultural Rhetorics Conversations,” there is an “impossibility of simply laying out a “universal” (or, an ‘essential’) frame for cultural rhetorics work” and point to CRTL’s insistence that scholars define CR as “a more situated scholarly practice in which the particularity of rhetorical practices within specific cultural communities sheds light on the myriad ways that culture and rhetoric emerge.” In fact, Casie Cobos Rhetoric Review, Vol. 38, No. 4, 375–401, 2019 Copyright © Taylor & Francis Group, LLC ISSN: 0735-0198 print / 1532-7981 online DOI: https://doi.org/10.1080/07350198.2019.1654760}, number={4}, journal={RHETORIC REVIEW}, author={Sackey, Donnie Johnson and Boyle, Casey and Xiong, Mai Nou and Rios, Gabriela Raquel and Arola, Kristin L. and Sackey, Donnie Johnson and Barnett, Scot}, year={2019}, month={Oct}, pages={375–401} }
 @article{guedira_xiong_hao_johnson_harrison_marshall_brown-guedira_2016, title={Heading Date QTL in Winter Wheat (Triticum aestivum L.) Coincide with Major Developmental Genes VERNALIZATION1 and PHOTOPERIOD1}, volume={11}, ISSN={["1932-6203"]}, DOI={10.1371/journal.pone.0154242}, abstractNote={In wheat (Triticum aestivum L.), time from planting to spike emergence is influenced by genes controlling vernalization requirement and photoperiod response. Characterizing the available genetic diversity of known and novel alleles of VERNALIZATION1 (VRN1) and PHOTOPERIOD1 (PPD1) in winter wheat can inform approaches for breeding climate resilient cultivars. This study identified QTL for heading date (HD) associated with multiple VRN1 and PPD1 loci in a population developed from a cross between two early flowering winter wheat cultivars. When the population was grown in the greenhouse after partial vernalization treatment, major heading date QTLs co-located with the VRN-A1 and VRN-B1 loci. Copy number variation at the VRN-A1 locus influenced HD such that RIL having three copies required longer cold exposure to transition to flowering than RIL having two VRN-A1 copies. Sequencing vrn-B1 winter alleles of the parents revealed multiple polymorphisms in the first intron that were the basis of mapping a major HD QTL coinciding with VRN-B1. A 36 bp deletion in the first intron of VRN-B1 was associated with earlier HD after partial vernalization in lines having either two or three haploid copies of VRN-A1. The VRN1 loci interacted significantly and influenced time to heading in field experiments in Louisiana, Georgia and North Carolina. The PPD1 loci were significant determinants of heading date in the fully vernalized treatment in the greenhouse and in all field environments. Heading date QTL were associated with alleles having large deletions in the upstream regions of PPD-A1 and PPD-D1 and with copy number variants at the PPD-B1 locus. The PPD-D1 locus was determined to have the largest genetic effect, followed by PPD-A1 and PPD-B1. Our results demonstrate that VRN1 and PPD1 alleles of varying strength allow fine tuning of flowering time in diverse winter wheat growing environments.}, number={5}, journal={PLOS ONE}, author={Guedira, Mohammed and Xiong, Mai and Hao, Yuan Feng and Johnson, Jerry and Harrison, Steve and Marshall, David and Brown-Guedira, Gina}, year={2016}, month={May} }
 @article{gurung_mamidi_bonman_xiong_brown-guedira_adhikari_2014, title={Genome-Wide Association Study Reveals Novel Quantitative Trait Loci Associated with Resistance to Multiple Leaf Spot Diseases of Spring Wheat}, volume={9}, ISSN={["1932-6203"]}, DOI={10.1371/journal.pone.0108179}, abstractNote={Accelerated wheat development and deployment of high-yielding, climate resilient, and disease resistant cultivars can contribute to enhanced food security and sustainable intensification. To facilitate gene discovery, we assembled an association mapping panel of 528 spring wheat landraces of diverse geographic origin for a genome-wide association study (GWAS). All accessions were genotyped using an Illumina Infinium 9K wheat single nucleotide polymorphism (SNP) chip and 4781 polymorphic SNPs were used for analysis. To identify loci underlying resistance to the major leaf spot diseases and to better understand the genomic patterns, we quantified population structure, allelic diversity, and linkage disequilibrium. Our results showed 32 loci were significantly associated with resistance to the major leaf spot diseases. Further analysis identified QTL effective against major leaf spot diseases of wheat which appeared to be novel and others that were previously identified by association analysis using Diversity Arrays Technology (DArT) and bi-parental mapping. In addition, several identified SNPs co-localized with genes that have been implicated in plant disease resistance. Future work could aim to select the putative novel loci and pyramid them in locally adapted wheat cultivars to develop broad-spectrum resistance to multiple leaf spot diseases of wheat via marker-assisted selection (MAS).}, number={9}, journal={PLOS ONE}, author={Gurung, Suraj and Mamidi, Sujan and Bonman, J. Michael and Xiong, Mai and Brown-Guedira, Gina and Adhikari, Tika B.}, year={2014}, month={Sep} }
 @article{guedira_maloney_xiong_petersen_murphy_marshall_johnson_harrison_brown-guedira_2014, title={Vernalization Duration Requirement in Soft Winter Wheat is Associated with Variation at the VRN-B1 Locus}, volume={54}, ISSN={["1435-0653"]}, DOI={10.2135/cropsci2013.12.0833}, abstractNote={Genetic variation in the factors controlling flowering in wheat (Triticum aestivum L.) allow it to be grown in a wide range of environments. The aim of this study was to identify genetic determinants of flowering time in winter wheat cultivars adapted to regions of the United States differing in latitude and the duration of cold temperatures during winter. Quantitative trait locus (QTL) analysis was performed in a recombinant inbred line (RIL) population from the cross between cultivars NC-Neuse and AGS 2000 that are adapted to the Mid-Atlantic and Southeastern regions, respectively. We identified a QTL for heading date (HD) in the greenhouse after 4 wk of vernalization, designated Qvdr.nc-5BL, which also had a large effect on winter dormancy release and HD when the population was evaluated in the field at locations in North Carolina, Georgia, and Louisiana during 2012 and North Carolina during 2013. However, Qvdr.nc-5BL did not have a significant effect on HD in greenhouse grown plants vernalized for 8 wk or in plants grown in the field at Raleigh, NC during 2011. In those environments where Qvdr.nc-5BL was not significant, a region on chromosome 2B, probably associated with the Ppd-B1 locus, was determined to have a HD effect. Interrogation of the population with gene-based markers for Vrn-B1 and Ppd-B1 suggests that these loci are major determinants of HD in winter wheat and are important for adaptation to diverse growing environments.}, number={5}, journal={CROP SCIENCE}, author={Guedira, Mohammed and Maloney, Peter and Xiong, Mai and Petersen, Stine and Murphy, J. Paul and Marshall, David and Johnson, Jerry and Harrison, Steve and Brown-Guedira, Gina}, year={2014}, pages={1960–1971} }