Digital Commons Network^™

長慶體、梅村體與“本事詩” : 略論中國詩體的叙事形態, Yinpeng Zhang

嶺南學報 Lingnan Journal of Chinese Studies

本文以中國詩學中的“赋”、“本事”、“記事”等概念為據，區分了唐人新樂府“諷諫”之旨與元白長慶體“叙事”之旨的不同；又據徐銑《本事詩》，析出長慶體在明代的餘波，以及清初“梅村體”的成功。此體並貫穿於清中葉，直至民初，成為吾國叙事詩的主型。

Based on the concepts of fa, benshi and jishi in Chinese poetry, this paper distinguishes the difference between the purpose of irony of Tang Dynasty’s xin yuefu and the narratives of changqing style by Yuan Zhen and Bai Juyi. This paper will further analyze the aftermath of the poetic style of changqing in the Ming Dynasty and the success of the poetic style of meicun in early Qing Dynasty according to Xu Qiu’s benshishi. This poetic style was practiced through the middle of the Qing Dynasty until the early years of the Republic of China, becoming the major style …

杜亞泉的啟蒙理性與生態意識 : 兼及生態時代的東西方文化交流, Shuyuan Lu

嶺南學報 Lingnan Journal of Chinese Studies

杜亞泉是中國近現代思想史上一位被長期塵封的學者，他不但是一位普及科學、呼籲民主、開發民智、變革社會的“百科全書”式的啟蒙者，同時又是一位尊重自然生命、宣導身心和諧、統整傳统與現代、致力平衡接續發展的卓越思想家。在激進主義潮流的遮蔽下，杜亞泉長期以來被國人遺忘，直到上世紀末纔被“發掘出土”，並受到學界重視。本文試圖立足於啟蒙理性的複雜性、啟蒙人格的多面性，並在與西方啟蒙思想家比較研究的基礎上，悉心探究被衆多論者忽視的杜亞泉啟蒙理性中的生態意識，進而追溯全球生態災難的起因與衍變，探索生態時代東西方文化交流的新維度、新走向，為地球人類樹立生態型世界觀、走出生態困境、創建生態文明提供一點參考意見。

Du Yaquan was a scholar in the history of modem Chinese thought, who has long been neglected and not been rediscovered until recently. He was not only an encyclopedic enlightenment thinker who called for democracy, the development of people’s intelligence, and societal change, but was also an outstanding thinker who respected natural life, advocated for physical and mental harmony, integrated tradition and modernity, and was devoted to balanced and sustainable development. Overshadowed by radical trends, Du has long been forgotten by the Chinese people and was not discovered until the end of the last century. History has proved that …

商盤手批《杜工部集》考辨, Shao-Huang Zeng

嶺南學報 Lingnan Journal of Chinese Studies

商盤作為清代著名文學家，有手批《杜工部集》一種，見藏於湖北省圖書館。商盤手批杜詩以朱筆小楷細書，通本滿批，被視為該館重要的珍稀善本之一，向不為學界所瞭解。商盤手批杜詩的内容多係選録清初學者黃生《杜詩説》一書。商盤在選録過程中刻意做了相關“技術性”處理：或删内容以泯其痕跡，或添枝葉以增其繁雜,或拆批語以亂其整體，或移位置以混其視綫，從内容到形式進行改頭换面，頗具迷惑性。商盤手批《杜工部集》保存了黃生《杜詩説》的大部分評點内容，為整理黃生《杜詩説》提供了可資參考的校勘材料；商盤手批杜詩對黃生《杜詩説》的選擇性抄録從一個侧面體現了清初杜詩學的研究風尚，也反映出清代杜詩手批文獻辨偽的艱巨性和複雜性。

In the Qing Dynasty, Shang Pan manually annotated Tu Fu’s Poetry Anthology (杜工部集), which is now stored at Hubei Provincial Library, where it is regarded as one of the most important rare books. However, academia has thus far not paid enough attention to Shang Pan’s annotations. In the process of selecting from Tu fu’s anthology, Shang Pan deliberately made relevant technical changes, including deleting content or adding details to increase the complexity of the anthology. Shang Pan’s changes to the anthology encompass both content and form, which could be confusing for the readers. In fact, Shang Pan’s annotations and …

李兆洛對駢文的重構, Shuangwei Lu

嶺南學報 Lingnan Journal of Chinese Studies

雖然駢文之實到漢魏已備，但“駢文”之名直到清代纔出現。在嘉道以來駢散不分的文章思潮下，李兆洛通過理論批評及創作駢散合一的文章等，實現了對“駢體文”指向的重構，從而推動了清代駢文創作與理論的新變。他理論上輕視“齊梁體”，推崇“漢魏體”，以此推尊駢文；又在選本上將秦漢具有排偶色彩的文章收入駢體文選本，事實上擴大了駢體文的容量，建構了駢散不分的“漢魏體”駢文。這種駢文追求風骨遒勁，文質相符；多用四言單句，罕用四六隔對；語言清麗，隸事渾融，不重聲律等。這是晚清最受推崇的駢文體式，從而又實現了對清初工整的四六駢體的解構。理解李兆洛對駢文重構的過程和影響，對今天的駢文研究具有重要價值。

Although the format of parallel prose was already established in Han and Wei Dynasties, the official term did not appear until Qing Dynasty. Since the trend of combining parallel prose and prose essay during the reigns of Emperor Jiaqin and Emperor Daoguang, Li Zhaoluo reconstructed the meaning of parallel prose through theoretical criticism and creative writing, and in doing so, innovated both the theory and the writing of parallel prose, In terms of theory, he criticized the parallel prose of Qi-Liang Style and praised the Han-Wei Style. He further added writings with parallel style from Qin and Han dynasties …

Multiphoton Quantum-State Engineering Using Conditional Measurements, Omar S. Magaña-Loaiza, Roberto De J. León-Montiel, Armando Perez-Leija, Alfred B. U’Ren, Chenglong You, Kurt Busch, Adriana E. Lita, Sae Woo Nam, Richard P. Mirin, Thomas Gerrits

Faculty Publications

The quantum theory of electromagnetic radiation predicts characteristic statistical fluctuations for light sources as diverse as sunlight, laser radiation, and molecule fluorescence. Indeed, these underlying statistical fluctuations of light are associated with the fundamental physical processes behind their generation. In this contribution, we experimentally demonstrate that the manipulation of the quantum electromagnetic fluctuations of two-mode squeezed vacuum states leads to a family of quantum-correlated multiphoton states with tunable mean photon numbers and degree of correlation. Our technique relies on the use of conditional measurements to engineer the excitation mode of the field through the simultaneous subtraction of photons from two-mode …

Nonlinear Xuv Signal Generation Probed By Transient Grating Spectroscopy With Attosecond Pulses, Ashley P. Fidler, Seth J. Camp, Erika R. Warrick, Etienne Bloch, Hugo J.B. Marroux, Daniel M. Neumark, Kenneth J. Schafer, Mette B. Gaarde, Stephen R. Leone

Faculty Publications

Nonlinear spectroscopies are utilized extensively for selective measurements of chemical dynamics in the optical, infrared, and radio-frequency regimes. The development of these techniques for extreme ultraviolet (XUV) light sources facilitates measurements of electronic dynamics on attosecond timescales. Here, we elucidate the temporal dynamics of nonlinear signal generation by utilizing a transient grating scheme with a subfemtosecond XUV pulse train and two few-cycle near-infrared pulses in atomic helium. Simultaneous detection of multiple diffraction orders reveals delays of ≥1.5 fs in higher-order XUV signal generation, which are reproduced theoretically by solving the coupled Maxwell–Schrödinger equations and with a phase grating model. The …

An Analysis Of The Shapes Of Interstellar Extinction Curves. Vii. Milky Way Spectrophotometric Optical-Through-Ultraviolet Extinction And Its R-Dependence, E. L. Fitzpatrick, Derck Massa, Karl D. Gordon, Ralph Bohlin, Geoffrey C. Clayton

Faculty Publications

We produce a set of 72 NIR-through-UV extinction curves by combining new Hubble Space Telescope/STIS optical spectrophotometry with existing International Ultraviolet Explorer spectrophotometry (yielding gapless coverage from 1150 to 10000 Å) and NIR photometry. These curves are used to determine a new, internally consistent NIR-through-UV Milky Way mean curve and to characterize how the shapes of the extinction curves depend on R(V). We emphasize that while this dependence captures much of the curve variability, considerable variation remains that is independent of R(V). We use the optical spectrophotometry to verify the presence of structure at intermediate wavelength scales in the curves. …

Limitations In Predicting Radiation-Induced Pharmaceutical Instability During Long-Duration Spaceflight, Rebecca S. Blue, Jeffery C. Chancellor, Erik L. Antonsen, Tina M. Bayuse, Vernie R. Daniels, Virginia E. Wotring

Faculty Publications

As human spaceflight seeks to expand beyond low-Earth orbit, NASA and its international partners face numerous challenges related to ensuring the safety of their astronauts, including the need to provide a safe and effective pharmacy for long-duration spaceflight. Historical missions have relied upon frequent resupply of onboard pharmaceuticals; as a result, there has been little study into the effects of long-term exposure of pharmaceuticals to the space environment. Of particular concern are the long-term effects of space radiation on drug stability, especially as missions venture away from the protective proximity of the Earth. Here we highlight the risk of space …

Lignin-Polysaccharide Interactions In Plant Secondary Cell Walls Revealed By Solid-State Nmr, Xue Kang, Alex Kirui, Malitha C. Dickwella Widanage, Frederic Mentink-Vigier, Daniel J. Cosgrove, Tuo Wang

Faculty Publications

© 2019, The Author(s). Lignin is a complex aromatic biopolymer that strengthens and waterproofs plant secondary cell walls, enabling mechanical stability in trees and long-distance water transport in xylem. Lignin removal is a key step in paper production and biomass conversion to biofuels, motivating efforts to re-engineer lignin biosynthesis. However, the physical nature of lignin’s interactions with wall polysaccharides is not well understood. Here we show that lignin self-aggregates to form highly hydrophobic and dynamically unique nanodomains, with extensive surface contacts to xylan. Solid-state NMR spectroscopy of intact maize stems, supported by dynamic nuclear polarization, reveals that lignin has abundant …

Integrated Solid-State Nmr And Molecular Dynamics Modeling Determines Membrane Insertion Of Human Β-Defensin Analog, Xue Kang, Christopher Elson, Jackson Penfield, Alex Kirui, Adrian Chen, Liqun Zhang, Tuo Wang

Faculty Publications

© 2019, The Author(s). Human β-defensins (hBD) play central roles in antimicrobial activities against various microorganisms and in immune-regulation. These peptides perturb phospholipid membranes for function, but it is not well understood how defensins approach, insert and finally disrupt membranes on the molecular level. Here we show that hBD-3 analogs interact with lipid bilayers through a conserved surface that is formed by two adjacent loops in the solution structure. By integrating a collection of 13C, 1H and 31P solid-state NMR methods with long-term molecular dynamic simulations, we reveal that membrane-binding rigidifies the peptide, enhances structural polymorphism, and promotes β-strand conformation. …

Male Dominance Status Regulates Odor-Evoked Processing In The Forebrain Of A Cichlid Fish, Alexandre A. Nikonov, Karen P. Maruska

Faculty Publications

© 2019, The Author(s). The ability to identify odors in the environment is crucial for survival and reproduction. However, whether olfactory processing in higher-order brain centers is influenced by an animal’s physiological condition is unknown. We used in vivo neuron and local field potential (LFP) recordings from the ventral telencephalon of dominant and subordinate male cichlids to test the hypothesis that response properties of olfactory neurons differ with social status. Dominant males had a high percentage of neurons that responded to several odor types, suggesting broad tuning or differential sensitivity when males are reproductively active and defending a territory. A …

Recurrent Fires Do Not Affect The Abundance Of Soil Fungi In A Frequently Burned Pine Savanna, Paige M. Hansen, Tatiana A. Semenova-Nelsen, William J. Platt, Benjamin A. Sikes

Faculty Publications

© 2019 Elsevier Ltd and British Mycological Society While the negative effects of infrequent, high-intensity fire on soil fungal abundance are well-understood, it remains unclear how the short-term history of frequent, low-intensity fire in fire-dependent ecosystems impacts abundance, and whether this history governs any abundance declines. We used prescribed fire to experimentally alter the short-term fire history of patches within a fire-frequented old-growth pine savanna over a 3 y period. We then quantified fungal abundance before and after the final fire using phospholipid fatty acid (PLFA) assays and Droplet Digital™ PCR (ddPCR). Short-term fire history largely did not affect total …

Elevated Levels Of Type 2 Respiratory Innate Lymphoid Cells In Human Infants With Severe Respiratory Syncytial Virus Bronchiolitis, Luan D. Vu, David Siefker, Tamekia L. Jones, Dahui You, Ryleigh Taylor, John Devincenzo, Stephania A. Cormier

Faculty Publications

© 2019 by the American Thoracic Society. Rationale: Studies of the immune responses at the site of respiratory syncytial virus (RSV) infection are sparse despite nearly five decades of research into understanding RSV disease. Objectives: To investigate the role of mucosal innate immune responses to RSV and respiratory viral load in infants hospitalized with the natural disease. Methods: Cytokines, viral load, and type 2 innate lymphoid cell (ILC2) levels in nasal aspirates, collected within 24 hours of enrollment, from infants hospitalized with RSV infection were quantified. Measurements and Main Results: RSV severity in infants was categorized based on admission to …

Rapid Evolutionary Responses To Insecticide Resistance Management Interventions By The German Cockroach (Blattella Germanica L.), Mahsa Fardisi, Ameya D. Gondhalekar, Aaron R. Ashbrook, Michael E. Scharf

Faculty Publications

The German cockroach (Blattella germanica L.) is a worldwide pest that lives exclusively in human environments. B. germanica threatens human health by producing asthma-triggering allergens, vectoring pathogenic/antibiotic-resistant microbes, and by contributing to unhealthy indoor environments. While insecticides are essential for reducing cockroach populations and improving health outcomes, insecticide resistance has been a consistent barrier to cockroach control since the 1950s. We conducted seminal field studies to compare three insecticide resistance intervention strategies for cockroaches and evaluated resistance evolution across multiple generations. Using pre-treatment resistance assessment to drive decisions, we found that single active ingredient (AI) treatments can successfully eliminate cockroaches …

The Green Peach Aphid Gut Contains Host Plant Micrornas Identified By Comprehensive Annotation Of Brassica Oleracea Small Rna Data, Max C. Thompson, Honglin Feng, Stefan Wuchty, Alex C.C. Wilson

Faculty Publications

Like all organisms, aphids, plant sap-sucking insects that house a bacterial endosymbiont called Buchnera, are members of a species interaction network. Ecological interactions across such networks can result in phenotypic change in network members mediated by molecular signals, like microRNAs. Here, we interrogated small RNA data from the aphid, Myzus persicae, to determine the source of reads that did not map to the aphid or Buchnera genomes. Our analysis revealed that the pattern was largely explained by reads that mapped to the host plant, Brassica oleracea, and a facultative symbiont, Regiella. To start elucidating the function of plant small RNA …

Warnings Of An “Insect Apocalypse” Are Premature, Timothy D. Schowalter, Michael R. Willig, Stephen J. Presley, Manoj Pandey

Faculty Publications

No abstract provided.

Draft Genome Sequence Data Of Cercospora Kikuchii, A Causal Agent Of Cercospora Leaf Blight And Purple Seed Stain Of Soybeans, Francisco J. Sautua, Sergio A. Gonzalez, Vinson P. Doyle, Marcelo F. Berretta, Manuela Gordó, Mercedes M. Scandiani, Maximo L. Rivarola, Paula Fernandez, Marcelo A. Carmona

Faculty Publications

Cercospora kikuchii (Tak. Matsumoto & Tomoy.) M.W. Gardner 1927 is an ascomycete fungal pathogen that causes Cercospora leaf blight and purple seed stain on soybean. Here, we report the first draft genome sequence and assembly of this pathogen. The C. kikuchii strain ARG_18_001 was isolated from soybean purple seed collected from San Pedro, Buenos Aires, Argentina, during the 2018 harvest. The genome was sequenced using a 2 × 150 bp paired-end method by Illumina NovaSeq 6000. The C. kikuchii protein-coding genes were predicted using FunGAP (Fungal Genome Annotation Pipeline). The draft genome assembly was 33.1 Mb in size with a …

A Review Of Interactions Between Insect Biological Control Agents And Semiochemicals, Anamika Sharma, Ramandeep Kaur Sandhi, Gadi V.P. Reddy

Faculty Publications

Biological control agents and semiochemicals have become essential parts of the integrated pest management of insect pests over recent years, as the incorporation of semiochemicals with natural enemies and entomopathogenic microbials has gained significance. The potential of insect pheromones to attract natural enemies has mainly been established under laboratory conditions, while semiochemicals from plants have been used to attract and retain natural enemies in field conditions using strategies such as trap crops and the push–pull mechanism. The best-known semiochemicals are those used for parasitoids–insect pest–plant host systems. Semiochemicals can also aid in the successful dispersal of entomopathogenic microbials. The use …

Rapid Quantification Of Lignite Sulfur Content: Combining Optical And X-Ray Approaches, Julia Kagiliery, Somsubhra Chakraborty, Autumn Acree, David C. Weindorf, Eric C. Brevik, Nicolas A. Jelinski, Bin Li, Cynthia Jordan

Faculty Publications

Coal is an important natural resource for global energy production. However, certain types of coal (e.g., lignite) often contain abundant sulfur (S) which can lead to gaseous sulfur dioxide (SO2) emissions when burned. Such emissions subsequently create sulfuric acid (H2SO4), thus causing highly acidic rain which can alter the pH of soil and surface waters. Traditional laboratory analysis (e.g., dry combustion) is commonly used to characterize the S content of lignite, but such approaches are laborious and expensive. By comparison, proximal sensing techniques such as portable X-ray fluorescence (PXRF) spectrometry, visible near infrared (VisNIR) spectroscopy, and optical sensors (e.g., NixPro) …

Dynamic Accretion Beneath A Slow-Spreading Ridge Segment: Iodp Hole 1473a And The Atlantis Bank Oceanic Core Complex, Henry J.B. Dick, Christopher J. Macleod, Peter Blum, Natsue Abe, Donna K. Blackman, Julie A. Bowles, M.J. Cheadle, K. Cho, Jakub Ciazela, Jeremy Deans, Virginia P. Edgcomb, C. Ferrando, Lyderic France, B. Ghosh, Benoit Ildefonse, Barbara John, Mark A. Kendrick, J. Koepke, James A.M. Leong, C. Liu, Q. Ma, T. Morishita, A. Morris, J.H. Natland, T. Nozaka, O. Pluemper, A. Sanflippo, J.B. Sylvan, Maurice A. Tivey, R. Tribuzio, G. Viegas

Faculty Publications

809 deep IODP Hole U1473A at Atlantis Bank, SWIR, is 2.2 km from 1,508‐m Hole 735B and 1.4 from 158‐m Hole 1105A. With mapping, it provides the first 3‐D view of the upper levels of a 660‐km² lower crustal batholith. It is laterally and vertically zoned, representing a complex interplay of cyclic intrusion, and ongoing deformation, with kilometer‐scale upward and lateral migration of interstial melt. Transform wall dives over the gabbro‐peridotite contact found only evolved gabbro intruded directly into the mantle near the transform. There was no high‐level melt lens, rather the gabbros crystallized at depth, and then emplaced …

Cantor Spectrum Of Graphene In Magnetic Fields, Simon Becker, Rui Han, Svetlana Jitomirskaya

Faculty Publications

We consider a quantum graph as a model of graphene in magnetic fields and give a complete analysis of the spectrum, for all constant fluxes. In particular, we show that if the reduced magnetic flux Φ / 2 π through a honeycomb is irrational, the continuous spectrum is an unbounded Cantor set of Lebesgue measure zero.

Calculations With Graded Perverse-Coherent Sheaves, Pramod N. Achar, William D. Hardesty

Faculty Publications

In this paper, we carry out several computations involving graded (or Gm-equivariant) perversecoherent sheaves on the nilpotent cone of a reductive group in good characteristic. In the first part of the paper, we compute the weight of the Gm-action on certain normalized (or 'canonical') simple objects, confirming an old prediction of Ostrik. In the second part of the paper, we explicitly describe all simple perverse-coherent sheaves for G = PGL3, in every characteristic other than 2 or 3. Applications include an explicit description of the cohomology of tilting modules for the corresponding quantum group, as well as a proof that …

Early Animal Evolution And Highly Oxygenated Seafloor Niches Hosted By Microbial Mats, Weiming Ding, Lin Dong, Yuanlin Sun, Haoran Ma, Yihe Xu, Runyu Yang, Yongbo Peng, Chuanming Zhou, Bing Shen

Faculty Publications

© 2019, The Author(s). The earliest unambiguous evidence for animals is represented by various trace fossils in the latest Ediacaran Period (550–541 Ma), suggesting that the earliest animals lived on or even penetrated into the seafloor. Yet, the O2 fugacity at the sediment-water interface (SWI) for the earliest animal proliferation is poorly defined. The preferential colonization of seafloor as a first step in animal evolution is also unusual. In order to understand the environmental background, we employed a new proxy, carbonate associated ferrous iron (Fecarb), to quantify the seafloor oxygenation. Fecarb of the latest Ediacaran Shibantan limestone in South China, …

Virtual Enriching Operators, Susanne C. Brenner, Li Yeng Sung

Faculty Publications

We construct bounded linear operators that map H conforming Lagrange finite element spaces to H conforming virtual element spaces in two and three dimensions. These operators are useful for the analysis of nonstandard finite element methods. 1 2

Stabilization And Robustness Analysis For A Chain Of Saturating Integrators Arising In The Visual Landing Of Aircraft, Laurent Burlion, Michael Malisoff, Frederic Mazenc

Faculty Publications

We study a chain of saturating integrators with imprecise output measurements, which arises in the study of visual landing of aircraft. Our input-to-state stability result uses a new dynamic extension. We illustrate our result in an aerospace application with realistic model parameters.

Adjective Learning In Young Typically Developing Children And Children With Developmental Language Disorder: A Retrieval-Based Approach, Laurence B. Leonard, Patricia Deevy, Jeffrey D. Karpicke, Sharon Christ, Christine Weber, Justin B. Kueser, Eileen Haebig

Faculty Publications

Purpose: There are strong retention benefits when learners frequently test themselves during the learning period. This practice of repeated retrieval has recently been applied successfully to children’s word learning. In this study, we apply a repeated retrieval procedure to the learning of novel adjectives by preschool-age children with developmental language disorder (DLD) and their typically developing (TD) peers. We ask whether the benefits of retrieval extend to children’s ability to apply the novel adjectives to newly introduced objects sharing the same characteristics as the objects used during the learning period. Method: Fourteen children with DLD (Mage = 62.64 months) and …

From The Arctic To The Tropics: Multibiome Prediction Of Leaf Mass Per Area Using Leaf Reflectance, Shawn P. Serbin, Jin Wu, Kim S. Ely, Eric L. Kruger, Philip A. Townsend, Ran Meng, Brett T. Wolfe, Adam Chlus, Zhihui Wang, Alistair Rogers

Faculty Publications

Leaf mass per area (LMA) is a key plant trait, reflecting tradeoffs between leaf photosynthetic function, longevity, and structural investment. Capturing spatial and temporal variability in LMA has been a long-standing goal of ecological research and is an essential component for advancing Earth system models. Despite the substantial variation in LMA within and across Earth's biomes, an efficient, globally generalizable approach to predict LMA is still lacking. We explored the capacity to predict LMA from leaf spectra across much of the global LMA trait space, with values ranging from 17 to 393 g m−2. Our dataset contained leaves from a …

Spatiotemporal Variability Of Fire Characteristics Affect Animal Responses In Pyric Landscapes, Bradley S. Cohen, Thomas J. Prebyl, Bret A. Collier, Michael J. Chamberlain

Faculty Publications

Background: Behavioral responses are the most immediate ways animals interact with their environment, and are primary mechanisms by which individuals mitigate mortality risk while ensuring reproductive success. In disturbance-driven landscapes, animals must adjust behaviors both spatially and temporally to maximize individual fitness. Prescribed fire is an important ecosystem driver in many coniferous forests, as fire cycles nutrients, creates spatially heterogeneous distributions in quantity and quality of forage and cover, and provides opportunities for fire-adapted taxa. Because fire immediately shifts resource distribution, and fire characteristics may drive behavioral responses to recent burns, we examined behavioral responses of 105 Global Positioning System …

Winter Cover Crops Effect On Soil Moisture And Soybean Growth And Yield Under Different Tillage Systems, Bharat Sharma Acharya, Syam Dodla, Lewis A. Gaston, Murali Darapuneni, Jim J. Wang, Seema Sepat, Hari Bohara

Faculty Publications

Current agricultural systems heavily rely on intensive tillage and inorganic fertilizer inputs. This tradition increases the cost of agricultural production and negatively affects agricultural systems and environment. Conservation practices, such as cover crops (CCs) and no-till (NT), could serve as a management approach to promote soil health and agricultural sustainability. There is limited understanding of CCs effect on soil properties, crop growth and yield under different tillage systems in the humid sub-tropical region of the US. This study evaluated the effect of winter cover crops [wheat (Triticum aestivum) and hairy vetch (Vicia villosa)] and different tillage systems [NT and conventional …

Genetic Diversity, Population Structure, And Marker-Trait Association For Drought Tolerance In Us Rice Germplasm, Uttam Bhattarai, Prasanta K. Subudhi

Faculty Publications

Drought is a major constraint in some rice-growing areas of the United States. Its impact is most severe at the reproductive stage resulting in low grain yield. Therefore, assessment of genetic and phenotypic variation for drought tolerance in US rice germplasm is necessary to accelerate the breeding effort. Evaluation of 205 US rice genotypes for drought tolerance at the reproductive stage revealed tolerant response in rice genotypes Bengal, Jupiter, Cypress, Jazzman, Caffey, and Trenasse. Harvest index and fresh shoot weight were identified as important traits to explain the majority of variability among the genotypes under drought tolerance. Genotyping with 80 …