Horticulture Commons^™

Blackeyed Susan Establishment And Injury Following Application Of Common Roadsides Herbicides, Rachel C. Woody-Pumford, Matt Bertucci, Mike D. Richardson, Dirk Phillip, Hannah E. Wright-Smith

Horticulture Faculty Publications and Presentations

Limited herbicide options are available for selective weed management in roadside native plantings. Thus, this field study evaluated blackeyed Susan's (Rudbeckia hirta L.) tolerance to four postemergence (POST) herbicides-quinclorac, florpyrauxifen-benzyl, clopyralid, and metsulfuron-during prairie establishment in Fayetteville, AR, across two growing seasons in 2022 and 2023. Blackeyed Susan was assessed for plant incidence, bloom count, and visible injury. In 2022, no reduction in blackeyed Susan blooms was detected in response to POST herbicides; however, peak bloom counts occurred 1 week after treatment (WAT) and ranged from 1.1 to 1.6 blooms per ft2. In 2023, at 10 WAT, blackeyed Susan plants …

Research Progress On The Effect Of Grafting Technology On Disease Resistance And Stress Resistance Of Watermelon, Xuena Liu, Shikai La, Chang Chen, Ainong Shi, Mingjiao Wang, Yingying Zhang, Jinghuai Guo, Lingdi Dong

Horticulture Faculty Publications and Presentations

Grafting is an effective horticultural technique that significantly enhances disease resistance and stress tolerance in watermelon. This review systematically summarizes the types of rootstocks used in watermelon grafting and analyzes the effects of grafting on plant responses to biotic stresses, such as viral and fungal pathogens, root-knot nematodes infections, and abiotic stresses, including drought, temperature extremes, and salinity. Furthermore, it discusses the changes in fruit quality and explores the underlying mechanisms associated with graft-induced resistance. By synthesizing recent research advances, this review aims to offer valuable insights and practical references for improving resistance and promoting sustainable production in cucurbit and …

Genome-Wide Association Study And Genomic Prediction Of Leaf Spot (Stemphylium Vesicarium) Resistance In Spinach Diversity Panel, Gehendra Bhattarai, Bo Liu, James Cor, Ainong Shi

Horticulture Faculty Publications and Presentations

Stemphylium leaf spot (SLP), caused by Stemphylium vesicarium, has emerged as an increasing threat to spinach production in the United States, with widespread outbreaks reported across major spinach-growing regions over the past two decades. The objectives of this study were to: (1) evaluate global USDA spinach germplasm collections and commercial cultivars for resistance to S. vesicarium; (2) perform genome-wide association studies (GWAS) to identify genomic regions associated with resistance; and (3) conduct genomic prediction (GP) to enhance selection accuracy. A total of 311 diverse spinach genotypes, including USDA germplasm accessions and commercial cultivars, were evaluated under greenhouse conditions at the …

Genetic Control Of Sweetness And Acidity In Blackberry, Carly Godwin, T. Mason Chizk, Carmen John, Lacy Nelson, Renee Threlfall, John R. Clark, Margaret L. Worthington

Horticulture Faculty Publications and Presentations

Introduction The global blackberry (Rubus subgenus Rubus) industry has experienced rapid growth during the past 20 years. Even so, many industry stakeholders report complaints from consumers and grocers stating that blackberries are often too tart or not sweet enough for their palate. Studies have shown that most consumers prefer sweet blackberries with relatively low acidity, but little research has been conducted to understand the genetic control of these traits in Rubus.Methods The objective of this study was to identify quantitative trait loci (QTL) related to sweetness and acidity in autotetraploid blackberry using a genome-wide association study (GWAS). A panel consisting …

Identification Of A Qtl Region For Tomato Brown Rugose Fruit Virus Resistance In Solanum Pimpinellifolium, Namrata Jaiswal, Bazgha Zia, Bidisha Chanda, Andrea Gillard, Ainong Shi, Kai-Shu Ling

Horticulture Faculty Publications and Presentations

Tomato (Solanum lycopersicum L.), one of the most widely grown vegetables in the world, has been seriously impacted in the past decade by the emerging tomato brown rugose fruit virus (ToBRFV). ToBRFV is a seed-borne tobamovirus, with ability to overcome the commonly used Tm-22 resistance gene in tomato. The objective of this study was to conduct quantitative trait locus (QTL) mapping and identify single-nucleotide polymorphism (SNP) markers associated with ToBRFV resistance in tomato. Two F2 populations were used for QTL mapping: One derived from a cross between S. pimpinellifolium USVL333 (PI 390718) x USVL332 (PI 390717) and another from 'Moneymaker' …

Greenhouse Evaluation Of Great Plains Native Grasses And Forbs Tolerance To Postemergence Herbicides Used For Roadside Weed Control, Rachel C. Woody-Pumford, Matthew B. Bertucci, Mike D. Richardson, Dirk Philipp, Hannah E. Wright-Smith

Horticulture Faculty Publications and Presentations

To combat the decline in North American grasslands and prairies, innovative strategies to establish new native grass and forb plantings must be considered. Integrated vegetation management entails the use of many practices to cultivate desirable vegetation along roadsides, including mowing, applying herbicides, burning, and replanting. Currently, only a limited selection of postemergence herbicides are available to improve native plant establishment along roadsides. A greenhouse herbicide screen that included four postemergence herbicides registered for use on Conservation Reserve Program (CRP) acres and rights-of-way was conducted to test their safety for use on four native grasses (big bluestem, buffalograss, sideoats grama, and …

Genome-Wide Characterization Of Vdac Gene Family In Soybean (Glycine Max L.) And In Silico Expression Profiling In Response To Drought And Salt Stress, Muhammad Muneeb Ullah, Muqadas Aleem, Mudassar Muhammad Iqbal, Ainong Shi

Horticulture Faculty Publications and Presentations

Soybean (Glycine max L.) is grown worldwide to obtain edible oil, livestock feed, and biodiesel. However, drought and salt stress are becoming serious challenges to global soybean cultivation as they retard the growth of soybean plants and cause significant yield losses. Voltage-dependent anion-selective channel (VDAC) proteins are well-known for their role in drought and salt tolerance in crop plants. In this study, we identified 111 putative VDAC genes randomly distributed in genomes of 14 plant species, including cultivated soybean (Glycine max) and wild soybean (Glycine soja). The comparative phylogenetic studies classified these genes into six different clades and found the …

Transcriptome Analysis Reveals Nutrient Deprivation Reduces Nitrate Content In Lettuce (Lactuca Sativa Var. Ramosa Hort.) And Enhances Nitrogen Metabolism, Yingying Zhang, Xuena Liu, Shikai La, Mingjiao Wang, Xu Hu, Ainoug Shi, Jinghuai Guo, Lingdi Dong

Horticulture Faculty Publications and Presentations

Introduction Excessive nitrate accumulation in leafy vegetables poses health risks and indicates inefficient nitrogen use in conventional agriculture. While nitrogen metabolism has been extensively studied, the molecular mechanisms linking nutrient deprivation to nitrate reduction in vegetables remain unclear. Methods In this study, we investigated these mechanisms in lettuce (Lactuca sativa var. ramosa Hort.) by analyzing nitrate content and gene expression in leaves and roots under nutrient deprivation. Results After five days of treatment, nitrate content decreased by 57.49% in leaves and 50.77% in roots. Transcriptome sequencing identified 323 and 3,494 differentially expressed genes (DEGs) in leaves and roots, respectively, with …

Genome Wide Association Study Of Fusarium Wilt Resistance In Spinacia Turkestanica, Sanjaya Gyawali, Gehendra Bhattarai, James C. Correll, Ainong Shi, Lindsey J. Du Troit

Horticulture Faculty Publications and Presentations

Fusarium wilt of spinach, caused by Fusarium oxysporum f. sp. spinaciae (Fos), leads to substantial losses in spinach (Spinacia oleracea) seed production in the only region of the USA suitable for growing spinach seed crops, the maritime Pacific Northwest. Accessions of wild spinach, S. turkestanica, serve as a major source of resistance to multiple spinach diseases. In this study, 84 Spinacia genotypes (all 68 S. turkestanica accessions available publicly and 16 S. oleracea) were evaluated for reactions to Fos at medium and high densities of inoculum comprising a mix of isolates of races 1 and 2, using a factorial experimental …

Genome-Wide Association Studies In Lettuce Reveal The Interplay Of Seed Age, Color, And Germination Under High Temperatures, Sookyung Oh, Ezekiel Ahn, Ainong Shi, Beiquan Mou, Sunchung Park

Horticulture Faculty Publications and Presentations

Thermoinhibition, the suppression of seed germination by high temperatures, is an adaptive trait that ensures successful seedling establishment in natural environments. While beneficial for wild plants, thermoinhibition can adversely affect crop yields due to uneven and reduced germination rates, particularly in the face of climate change. To understand the genetic basis of thermoinhibition, we conducted a comprehensive genetic analysis of a diverse panel of Lactuca spp. accessions. Our findings revealed that L. serriola, a wild ancestor of cultivated lettuce, showed relaxed thermoinhibition response compared to cultivated lettuce, suggesting that this trait may have been positively selected during early domestication in …

Clbbm And Clplt2 Function Redundantly During Both Male And Female Gametophytes Development In Watermelon, Qiyan Liu, Dongfen Han, Jinfan Chen, Jie Wang, Denghu Cheng, Xiner Chen, Jiao Jiang, Shujjuan Tian, Jiafa Wang, Man Liu, Haizheng Xiong, Li Yuan

Horticulture Faculty Publications and Presentations

As a prerequisite for sexual reproduction, gametophyte development is an interesting process involving cell proliferation, differentiation and specialization. Gametogenesis has been extensively explored in model plants, but the regulatory mechanism of gametophyte development largely remains unknown in Cucurbitaceae species. In present study, we have shown that watermelon ClBBM and ClPLT2, two AP2/ERF transcription factors, participated in both male and female gametophyte development. Clbbm and Clplt2 single mutants resembled wild-type phenotypes in both vegetative and reproductive development. But Clbbm/Clplt2 double mutant showed partial pollen abortion and bore less seeds comparing to WT. Our results indicated that the abnormal pollen grains were …

Identification Of Salt Tolerance And Stress Response In Us Department Of Agriculture Tomato Germplasm At The Seedling Stage, Ibtisam Alatawi, Haizheng Xiong, Kenani Chiwina, Hanan Alkabkabi, Qun Luo, Neelendra K. Joshi, Xiaolun Sun, Xuan Zhuang, Kai-Shi Ling, Ainong Shi

Horticulture Faculty Publications and Presentations

Soil salinity is a significant abiotic factor that impedes sustainable crop production in key agricultural regions worldwide. Saline cultivation adversely affects soil quality, whereas the use of saline water for irrigation disrupts the physiological and biochemical processes of plants. Continuous irrigation with high salt concentrations leads to a gradual buildup of soil salinity, thus hindering optimal plant growth and development. Consequently, there is a growing emphasis on breeding salinity-tolerant cultivars of various crops. In this study, 71 tomato accessions sourced from 20 countries and provided by the US Department of Agriculture were evaluated under controlled greenhouse conditions and subjected to …

Quantifying Temperature Effects On Development Rate And Plant Quality Of Compact Container-Grown Tomato, Morgan Humphrey, Ryan W. Dickson, Sonali Padhye

Horticulture Faculty Publications and Presentations

Mean daily temperature effects on plant development rates and quality were evaluated for compact container-grown tomato (Solanum lycopersicum). Compact tomato varieties ‘Siam’ and ‘Red Velvet’ were grown in greenhouses at 18 to 26 °C (Expt. 1) and 20 to 30 °C (Expt. 2) under supplemental high-pressure sodium lighting and 16-h photoperiod. The number of days to first open flower, first ripe fruit and from flower to ripe fruit were measured and development rates calculated by taking the reciprocal (e.g., 1/d). Temperature effects were predicted by fitting a linear (for first open flower) and a nonlinear exponential function (for …

Shade, Height Of Cut, And Plant Growth Regulator Effects On Bermudagrass And Zoysiagrass Putting Greens, Thomas E. Walton, John Mccalla, Douglas E. Karcher, W. J. Hutchens, Ambika Chandra, Michael D. Richardson

Horticulture Faculty Publications and Presentations

Warm-season turfgrasses, especially hybrid bermudagrass (Cynodon dactylon (L.) Pers × Cynodon transvaalensis Burtt-Davy), continue to be widely used on golf course putting greens in tropical and subtropical climates globally and are also gaining popularity in the transition zone region of the United States. Hybrid bermudagrass produces a high-quality putting green surface; however, it has relatively poor shade and cold tolerance. Recently, fine-textured zoysiagrass (Zoysia spp.) cultivars have been released and may be another potential option for golf course putting greens, especially since zoysiagrass is generally considered more shade tolerant than bermudagrass. “Lazer (DALZ 1308)” zoysiagrass (Zoysia …

Strategic Light Use Efficiency Optimization Of Hydroponic Lettuce Exposed To Different Photosynthetic Photon Flux Densities, Peyton Lou Palsha, Marc W, Van Iersel, Ryan W. Dickson, Lynne Seymour, Kuan Qin, Rhuanito Saranz Ferrarezi

Horticulture Faculty Publications and Presentations

Light use efficiency characterizes the ability of a crop to convert radiation into biomass. Determining optimum cultivar-specific photosynthetic photon flux density (PPFD) values from sole-source lighting can be used to optimize leaf expansion, maximize biomass, and shorten the production period. This study evaluated the growth of hydroponic lettuce (Lactuca sativa) ‘Rex’ cultivated under different PPFD levels using sole-source lighting. At lower PPFD levels of 201 to 292 µmol·m⁻²·s⁻¹, the plant projected canopy size (PCS) and specific leaf area increased to enhance light capture by 36.2% as compared to higher PPFD levels (333 and 413 µmol·m^{−2 …}

Fifteen Years Of Findings: Advancements In Spring Dead Spot Research From 2009 To 2024, W. J. Hutchens, J. K. Anders, E. L. Butler, J. P. Kerns, D. S. Mccall, G. L. Miller, N. R. Walker

Horticulture Faculty Publications and Presentations

Spring dead spot (Ophiosphaerella spp.; SDS) is one of the most detrimental diseases to warm-season turfgrasses, particularly bermudagrass (Cynodon spp.), growing in climates where cold temperatures induce dormancy. The pathogen can infect the crowns, stolons, rhizomes, and roots of bermudagrass most of the year, but infection in the fall predisposes the turf to winter injury and plant death. Symptoms typically appear the following spring, making management of SDS challenging. Moreover, the biology, epidemiology, and management of SDS are not fully understood. Ample research has been conducted on SDS which was thoroughly summarized before 2009 by Tredway et al. …

Quantifying Temperature Effects On Plant Development Rates And Quality Of Compact Container-Grown Pepper, Ryan W. Dickson, Sonali Padhye, Leala M. Machesney, Josh Tebow

Horticulture Faculty Publications and Presentations

The mean daily temperature effects on plant development rates and quality of compact container-grown pepper were evaluated. Compact pepper cultivars Fresh Bites Yellow and Hot Burrito were grown in greenhouses at 18 to 26 °C (Expt. 1) and 20 to 30 °C (Expt. 2) under supplemental high-pressure sodium lighting and a 16-hour photoperiod. The number of days to first open flower, to first ripe fruit, and from flower to ripe fruit were measured and the development rates calculated by taking the reciprocal (e.g., 1/day). Temperature effects were predicted by fitting a nonlinear exponential function that included the base temperature ( …

Management Strategies For Preventing And Recovering From Bermudagrass Winterkill, W. J. Hutchens, T. Q. Carr, A. J. Patton, C. A. Bigelow, Eric J. Deboer, J. M. Goatley, D. L. Martin, D. S. Mccall, G. L. Miller, J. S. Powlen, M. D. Richardson, M. Xiang

Horticulture Faculty Publications and Presentations

Abstract

Bermudagrass (Cynodon spp. Rich) is a warm-season grass that is widely planted throughout tropical, sub-tropical, and even temperate climates, and it generally requires fewer inputs than most cool-season turfgrasses. In recent years, the area of adaptation for bermudagrass has progressively expanded to cooler climates due to the development of more cold-tolerant cultivars. The expanded area of adaptation as well as the reduced inputs required to maintain healthy turfgrass have made bermudagrass a popular choice in areas of marginal adaptation. In these areas, the greatest threat to bermudagrass health and survivability is winterkill. This management guide seeks to describe …

Improving Winter Survival Of Interspecific Hybrid Bermudagrass In The Mid-Atlantic Region Through Cultural Practices, Joseph R. Doherty, W. J. Hutchens, Jordan C. Booth, David S. Mccall, Michael V. Battaglia, Eric J. Deboer, Joseph A. Roberts

Horticulture Faculty Publications and Presentations

Winter injury can cause significant loss of hybrid bermudagrasses [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy] in the transition zone. Current research has focused on high-value, low-acreage areas like putting greens, but those practices are impractical to implement on golf course fairways. To that end, multi-year research projects were conducted at three sites across Maryland and Virginia to investigate the influence of annual N fertility [2.0 lb N 1000 ft⁻² (early summer application) or 4.0 lb N 1000 ft⁻² (split applied early and late summer)] across multiple fall mowing heights (0.5 inches, 0.8 inches, or 1 …

Tolerance Of Young Blackberries To A Selection Of Preemergence Herbicides And Rates, Kayla Knepp, Matthew B. Bertucci, Aaron J. Cato, Amanda L. Mcwhirt, Nilda Roma-Burgos

Horticulture Faculty Publications and Presentations

Limited preemergence herbicides are registered for new blackberry (Rubus subgenus Rubus) plantings. This greenhouse experiment was designed to investigate the effects of a broad selection of preemergence herbicides at multiple rates on blackberry transplants. Screening was initiated Aug 2021 and repeated Mar 2022 in Fayetteville, AR, USA, in a greenhouse at the Milo J. Shult Agricultural Research and Extension Center. ‘Ouachita’ blackberry plugs were transplanted into utility pots that contained field soil and growth media treated with preemergence herbicides. After transplanting, plant height was measured from the substrate to the highest apical meristem of 25 representative plants. Initial …

The Most Outstanding—Recognizing Achievements Through Ashs Publication Awards: A Brief History Of Publications And An Introduction To Publication Awards, Curt R. Rom

Horticulture Faculty Publications and Presentations

The American Society for Horticultural Science (ASHS) has since its inception published annual serial monographs or journals to achieve its mission of communicating horticultural science. To recognize the accomplishments of the membership, a series of professional awards was created. After the individual awards, the ASHS created publication awards. This paper, and the papers that follow, document the publication awards of the ASHS. The papers were based on presentations at the 2023 annual conference and serve as additional recognition of the contributions of member authors and as a historical record of achievements of the ASHS.

Twenty-Five Years Of Award-Winning Education Publication Excellence In Ashs Journals, Curt R. Rom

Horticulture Faculty Publications and Presentations

The American Society for Horticultural Science Education Publication Excellence award was established in 1997 to recognize the most outstanding publication in ASHS journals related to education and teaching. This article reviews the award history, authors, and topics of the awarded papers. The award was recognized annually from 1998 to 2023 except for 3 years when no award was given. The majority of awarded papers were published in HortTechnology. Awards were presented to 70 authors from 23 institutions in 20 states and two other countries. Of the awarded papers, three had single authors, and 20 had multiple authors. Several awarded authors …

Evaluation Of Fall And Winter Trinexapac-Ethyl Applications On Ultradwarf Bermudagrass Putting Green Color, Quality, And Green Cover, J. C. Booth, W. J. Hutchens, S. D. Askew, J. M. Goatley, X. Zhang, D. S. Mccall

Horticulture Faculty Publications and Presentations

Ultradwarf bermudagrass (UDB) putting greens grown in subtropical and temperate climates can face elevated risk of winter injury from cold temperatures. Trinexapac-ethyl (TE) inhibits UDB growth potentially reducing spring green-up and overexertion of carbohydrate reserves for UDB during the cold de-acclimation period. A field study was conducted to determine the effect of fall and winter TE applications on the visual quality and color of UDB putting greens in Virginia from the cold acclimation phase through the cold de-acclimation phase. A second controlled-environment study was conducted to determine how TE applications to UDB during cold acclimation affected UDB cold tolerance. In …

An Evaluation Of Bacterial Wilt (Ralstonia Solanacearum) Resistance In A Set Of Tomato Germplasm From The United States Department Of Agriculture, Theresa M. Phiri, Gehendra Bhattarai, Kenani Edward Chiwina, Qiurong Fan, Haizheng Xiong, Ibtisam Alatawi, Ryan Dickson, Neelendra K. Joshi, Alejandro Rojas, Kai-Shu Ling, Ainong Shi

Horticulture Faculty Publications and Presentations

Bacterial wilt (BW), caused by Ralstonia solanacearum, is one of the devastating diseases in tomatoes (Solanum lycopersicum L.). The use of resistant cultivars and breeding for genetic resistance is the most effective, economical, and environmentally friendly management strategy for this disease. It is necessary to screen diverse germplasm and cultivated genotypes to identify resistant resources and to develop resistant cultivars in tomatoes to combat the changing pathogen isolates. This study evaluated 40 United States Department of Agriculture (USDA) tomato accessions for their BW resistance to the R. solanacearum isolate P822 under greenhouse conditions. The tomato plants were inoculated …

Evaluation Of Drought Tolerance In Usda Tomato Germplasm At Seedling Stage, Kenani E. Chiwina, Gehendra Bhattarai, Haizheng Xiong, Neelendra K. Joshi, Ryan W. Dickson, Theresa M. Phiri, Ibtisam Alatawi, Yilin Chen, Zachary Stansell, Kai-Shu Ling, Ainong Shi

Horticulture Faculty Publications and Presentations

Drought, a crucial abiotic stressor, markedly reduces the growth and yield of tomato crops (Solanum lycopersicum L.). Consequently, adopting drought-resistant cultivars and implementing breeding programs to enhance drought tolerance have emerged as enduring solutions to alleviate the adverse effects of drought in various tomato cultivation regions. In this study, 68 United States Department of Agriculture (USDA) tomato accessions were assessed in a controlled greenhouse experiment, encompassing both water deficit treatment and a control group subjected to standard watering conditions. The experiment was arranged in a randomized complete block design with three replications. The results of this study pinpointed four …

Shinyfruit: Interactive Fruit Phenotyping Software And Its Application In Blackberry, T. Mason Chizk, Jackie A. Lee, John R. Clark, Margaret L. Worthington

Horticulture Faculty Publications and Presentations

Introduction: Horticultural plant breeding programs often demand large volumes of phenotypic data to capture visual variation in quality of harvested products. Increasing the throughput potential of phenomic pipelines enables breeders to consider data-hungry molecular breeding strategies such as genome-wide association studies and genomic selection.

Methods: We present an R-based web application called ShinyFruit for image-based phenotyping of size, shape, and color-related qualities in fruits and vegetables. Here, we have demonstrated one potential application for ShinyFruit by comparing its estimates of fruit length, width, and red drupelet reversion (RDR) with ImageJ and analogous manual phenotyping techniques in a population of blackberry …

Genetic Architecture Of Salt Tolerance In Cowpea (Vigna Unguiculata (L.) Walp.) At Seedling Stage Using A Whole Genome Resequencing Approach, Waltram Ravelombola, Lindgi Dong, Thomas Casey Barickman, Haizheng Xiong, Aurora Manley, John Cason, Hanh Pham, Bazgha Zia, Beiquan Mou, Ainong Shi

Horticulture Faculty Publications and Presentations

Cowpea (Vigna unguiculata (L.) Walp.) is a diploid legume crop used for human consumption, feed for livestock, and cover crops. Earlier reports have shown that salinity has been a growing threat to cowpea cultivation. The objectives of this study were to conduct a genome-wide association study (GWAS) to identify SNP markers and to investigate candidate genes for salt tolerance in cowpea. A total of 331 cowpea genotypes were evaluated for salt tolerance by supplying a solution of 200 mM NaCl in our previous work. The cowpea panel was genotyped using a whole genome resequencing approach, generating 14,465,516 SNPs. Moreover, …

Genome-Wide Association Study And Genomic Prediction Of Fusarium Wilt Resistance In Common Bean Core Collection, Kenani Chiwina, Haizheng Xiong, Gehendra Bhattarai, Ryan Dickson, Theresa Makawa Phiri, Yilin Chen, Ibtisam Alatawi, Derek Dean, Neelendra K. Joshi, Yuyan Chen, Awais Riaz, Paul Gepts, Mark Brick, Patrick Byrne, Howard Schwartz, James B. Ogg, Kristen Otto, Amy Fall, Jeremy Gilbert, Ainong Shi

Horticulture Faculty Publications and Presentations

The common bean (Phaseolus vulgaris L.) is a globally cultivated leguminous crop. Fusarium wilt (FW), caused by Fusarium oxysporum f. sp. phaseoli (Fop), is a significant disease leading to substantial yield loss in common beans. Disease-resistant cultivars are recommended to counteract this. The objective of this investigation was to identify single nucleotide polymorphism (SNP) markers associated with FW resistance and to pinpoint potential resistant common bean accessions within a core collection, utilizing a panel of 157 accessions through the Genome-wide association study (GWAS) approach with TASSEL 5 and GAPIT 3. Phenotypes for Fop race 1 and race …

Determining Cardinal Temperatures For Eight Cover Crop Species, Mila V. Pessotto, Trenton Roberts, Matthew B. Bertucci, Caio Dos Santos, Jeremy Ross, Mary C. Savin

Horticulture Faculty Publications and Presentations

Growing degree days (GDD) is a tool to predict plant growth and can be adapted for use in any plant species, including cover crops. A limitation of the GDD calculation is accurate temperature parameters used to predict plant development. For most cover crop species, the cardinal temperatures are not well defined in the literature, leading to a less accurate calculation of GDD. The objective of this study was to determine the cardinal temperatures of eight cover crop species, including Austrian winter pea (Pisum sativum), balansa clover (Trifolium michelianum), barley (Hordeum vulgare), black-seeded oats ( …

A Genome-Wide Association Study Reveals Region Associated With Seed Protein Content In Cowpea, Yilin Chen, Haizheng Xiong, Waltram Ravelombola, Gehendra Bhattarai, Casey Barickman, Ibtisam Alatawi, Theresa Makawa Phiri, Kenani Chiwina, Beiquan Mou, Shyam Tallury, Ainong Shi

Horticulture Faculty Publications and Presentations

Cowpea (Vigna unguiculata L. Walp., 2n = 2x = 22) is a protein-rich crop that complements staple cereals for humans and serves as fodder for livestock. It is widely grown in Africa and other developing countries as the primary source of protein in the diet; therefore, it is necessary to identify the protein-related loci to improve cowpea breeding. In the current study, we conducted a genome-wide association study (GWAS) on 161 cowpea accessions (151 USDA germplasm plus 10 Arkansas breeding lines) with a wide range of seed protein contents (21.8~28.9%) with 110,155 high-quality whole-genome single-nucleotide polymorphisms (SNPs) to identify …