Meet the Team

VITIS x MUSCADINIA

Our collaborative and transdisciplinary project team includes 31 U.S. Vitis and Muscadinia experts in grape genetics, breeding, and pathology from cultivar development programsfruit quality experts including food science, postharvest storage, sensory, and analysis of aroma, flavor, and color attributes; agricultural marketing experts focused on consumer attitudes and behaviors for horticulture crops; and production and extension experts.

Project Directors

Portrait photo of Renee Threlfall with long hair wearing a red shirt.

Renee Threlfall – University of Arkansas

Project Director
Associate Professor
rthrelf@uark.edu

Portrait photo of Margaret Worthington with green ear rings wearing a green shirt.

Margaret Worthington – University of Arkansas

Project Co-Director
Associate Professor
mlworthi@uark.edu

Jordan Slayden with curly hair smiles warmly at the camera, exuding joy and confidence.

Jordan Slayden – University of Arkansas

Project Manager
Program Associate
jmslayde@uark.edu

A visual representation of Vitis × Muscadinia with marketing grapes, showcasing branding, packaging, and promotional strategies

Transdisciplinary Approach

Our collaborative and transdisciplinary project team includes 31 U.S. Vitis and Muscadinia experts in grape Genetics (Obj. 1), Breeding (Obj. 2), and Pathology (Obj. 3) from cultivar development programs; fruit Quality (Obj. 4) experts including food science, postharvest storage, sensory, and analysis of aroma, flavor, and color attributes; agricultural Marketing (Obj. 5) experts focused on consumer attitudes and behaviors for horticulture crops; and Production and extension (Obj. 6) experts. Breeders will provide plants and germplasm for pathology, quality, marketing, and production trials (Obj. 3~6), and the results of these trials will shape subsequent breeding and genetic research targets. The Production team plays an integrated role by providing Muscadinia and Vitis x Muscadinia field trials and outreach supporting Breeding, Pathology, Quality, and Marketing efforts involving growers and consumers. The Quality and Marketing teams will work collaboratively to identify key attributes that drive consumer purchasing of fresh-market grapes, as well as flavor and aromas that consumers prefer. 

Objective 1 – Genetics

Qi Sun with glasses wearing a plaid shirt, smiling and standing against a neutral background.

Qi Sun – Cornell University

Objective Lead
Senior Research Associate
qisun@cornell.edu

Wojtek Pawlowski with grey hair wearing a black jacket stands confidently, exuding a sense of maturity and style.

Wojtek Pawlowski – Cornell University

Professor
wp45@cornell.edu

Portrait photo of Margaret Worthington with green ear rings wearing a green shirt.

Margaret Worthington –University of Arkansas

Associate Professor
mlworthi@uark.edu

Lance Cadle-Davidson wearing a red and white checkered shirt smiles warmly at the camera.

Lance Cadle-Davidson – USDA-ARS, GGRU

Research Plant Pathologist
lance.cadledavidson@usda.gov

Objective 2 – Breeding

Portrait photo of Margaret Worthington with green ear rings wearing a green shirt.

Margaret Worthington –University of Arkansas

Objective Lead
Associate Professor
mlworthi@uark.edu

Patrick Conner wearing glasses and a maroon shirt, looking confidently at the camera.

Patrick Conner – University of Georgia

Professor
pconner@uga.edu

Luis Diaz-Garcia with glasses and a beard, exuding warmth and friendliness.

Luis Diaz-Garcia – University of California

Assistant Professor
diazgarcia@ucdavis.edu

Islam Elsharkawy in a jacket and glasses, exuding a professional and stylish appearance.

Islam El Sharkawy – Florida A&M University

Associate Professor
islam.elsharkawy@famu.edu

Madeline Oravec with long brown hair wearing a green shirt smiles warmly at the camera.

Madeline Oravec – Cornell University

Assistant Professor
mwo23@cornell.edu

Surya Sapkota stands in a vineyard, holding a bag filled with fresh grapes, surrounded by lush green vines.

Surya Sapkota – USDA-ARS

Research Plant Geneticist
surya.sapkota@usda.gov

Objective 3 – Pathology

Lance Cadle-Davidson wearing a red and white checkered shirt smiles warmly at the camera.

Lance Cadle-Davidson – USDA-ARS, GGRU

Objective Lead
Research Plant Pathologist
lance.cadledavidson@usda.gov

Phil Brannen with white hair seated in a kitchen, surrounded by various cooking utensils and a warm atmosphere.

Phillip Brannen – University of Georgia

Professor
pbrannen@uga.edu

Elizabeth Cieniewicz with long brown hair wearing a polka dot shirt, smiling against a neutral background.

Elizabeth Cieniewicz – Clemson University

Assistance Professor
ecienie@clemson.edu

Bill Cline with a mustache wearing a suit jacket stands confidently in front of a lush green bush.

Bill Cline – North Carolina State University

Extension Specialist
bcline@ncsu.edu

Patrick Conner wearing glasses and a maroon shirt, looking confidently at the camera.

Patrick Conner – University of Georgia

Professor
pconner@uga.edu

Sarah Lowder with red hair smiles brightly in front of lush green plants, creating a vibrant and cheerful atmosphere.

Sarah Lowder – University of Georgia

Assistant Professor
sarah.lowder@uga.edu

Objective 4 – Quality

Portrait photo of Renee Threlfall with long hair wearing a red shirt.

Renee Threlfall –University of Arkansas

Objective Lead
Associate Professor
rthrelf@uark.edu

Angelos Deltsidis in a white shirt stands confidently in front of a vast green field under a clear blue sky.

Angelos Deltsidis – University of Georgia

Assistant Professor
adeltsidis@uga.edu

Scott Lafontaine with a beard wearing a shirt, exuding warmth and friendliness.

Scott Lafontaine – University of Arkansas

Assistant Professor
scottla@uark.edu

Penny Perkins-Veazie with short hair wearing a blue shirt, smiling and standing against a neutral background.

Penny Perkins-Veazie – North Carolina State University

Professor
penelope_perkins@ncsU.edu

Gavin Sacks in a blue shirt and tie stands confidently in front of lush green trees, exuding professionalism and poise.

Gavin Sacks – Cornell University

Professor
gls9@cornell.edu

Charles A. Sims wearing a white polo shirt smiles warmly, exuding a friendly and approachable demeanor.

Charles Sims – University of Florida

Professor
csims@ufl.edu

Steve Talcott in a black suit smiles warmly at the camera.

Steve Talcott – Texas A&M University

Professor
stalcott@tamu.edu

Portrait photo of Margaret Worthington with green ear rings wearing a green shirt.

Margaret Worthington –University of Arkansas

Project Co-Director
Associate Professor
mlworthi@uark.edu

Objective 5 – Marketing

Melinda Knuth with vibrant green hair wearing a matching green necklace, showcasing a unique and striking appearance.

Melinda Knuth – North Carolina State University

Objective Lead
Assistant Professor
mjknuth@ncsu.edu

Di Fang with long black hair wearing a black top, standing confidently against a neutral background.

Di Fang – University of Florida

Associate Professor
difang@ufl.edu

Alexa Lamm with curly hair wearing a black shirt, smiling and looking confidently at the camera.

Alexa Lamm – University of Georgia

Professor
alamm@uga.edu

Catherine Sanders in a pink blazer and white shirt poses confidently against a textured brick wall backdrop.

Catherine Sanders – North Carolina State University

Assistant Professor
catherine_sanders@ncsu.edu

Objective 6 – Production

Mark Hoffmann with a beard wearing a tie and a blue shirt, exuding professionalism and confidence.

Mark Hoffmann – North Carolina State University

Objective Lead
Associate Professor
mark.hoffmann@ncsu.edu

Brent Arnoldussen in glasses and a hat stands beside an apple tree, surrounded by lush green foliage and ripe apples.

Brent Arnoldussen – University of Kentucky

Assistant Professor
ba346@cornell.edu

Daniel Becker with glasses and a beard is wearing a plaid shirt, exuding a casual and stylish appearance.

Daniel Becker – University of Kentucky

Extension Associate
daniel.becker@uky.edu

Michael Cook in a maroon shirt stands confidently in front of a lush vineyard, surrounded by rows of grapevines.

Michael Cook – Texas A&M University

Program Specialist
m.cook@tamu.edu

Sarah Lowder with red hair smiles brightly in front of lush green plants, creating a vibrant and cheerful atmosphere.

Sarah Lowder – University of Georgia

Assistant Professor
sarah.lowder@uga.edu

Amanda McWhirt wearing a blue shirt and a black blazer, standing confidently with a neutral background.

Amanda McWhirt – University of Arkansas, Cooperative Extension

Associate Professor
amcwhirt@uada.edu

Ali Sarkhosh in a blue jacket stands amidst a backdrop of lush green trees.

Ali Sarkhosh – University of Florida

Associate Professor
sarkhosha@ufl.edu

Justin Scheiner in a maroon shirt stands confidently in front of a lush vineyard, surrounded by rows of grapevines.

Justin Scheiner – Texas A&M University

Associate Professor
jscheiner@tamu.edu

Eric Stafne wearing glasses and a shirt smiles warmly at the camera, exuding a friendly and approachable demeanor.

Eric Stafne – Mississippi State University

Professor
eric.stafne@msstate.edu

Contact Us

Renee Threlfall

2650 N. Young Ave.
Fayetteville, AR 72704
479-575-4677
vxm@uada.edu