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  • Expert Resources

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    From farms and gardens to families and finances, our expert resources empower Georgians with trustworthy, practical science.

    Gardening
    Invasive species
    Food and food safety
    Ants, termites and other pests
    Pollinators
    Livestock
    Emergency preparedness
    Home safety and maintenance
    Health, family and finances
    Nutrition
    Water quality
    Lawn maintenance and landscaping
    Turfgrass
    View all topics

    What is an Expert Resource?


    We publish unbiased, research-backed expert advice to empower Georgians with practical, trustworthy information they can trust.

    These resources are written and reviewed by experts in the UGA College of Agricultural and Environmental Sciences and the UGA College of Family and Consumer Sciences.

    Learn how we produce science you can trust
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  1. Home
  2. Our People
  3. Esther van der Knaap

Esther van der Knaap


Professor; Emphasis: Tomatoes, plant development, genetics & genomics

  • Horticulture
  • Institute of Plant Breeding, Genetics and Genomics (IPBGG)
Esther van der Knaap
Esther van der Knaap
Areas of expertiseEducationAwards and honorsCoursesScholarly works

Areas of expertise

Plant BiologyGeneticsBiochemistry and Cell BiologyEvolutionary Biology

Education

Doctor of Philosophy, Genetics, General

Michigan State University, MI, United States (1998)

Master of Science, Plant Pathology/Phytopathology

Wageningen Agricultural University, Netherlands (1990)

Bachelor of Science, Plant Pathology/Phytopathology

Wageningen Agricultural University, Netherlands (1990)

Awards and Honors

  • Student Career Success Influencer Award 2024 (2024)
  • Student Career Success Influencer Award 2024 (2024)
  • UGA Distinguished Research Professor (2022)

Courses

  • PBGG 7000: Master's Research (Fall 2025)
  • PBGG 9000: Doctoral Research (Fall 2025)
  • PBGG 9300: Doctoral Dissertation (Fall 2025)
  • PBGG 9300: Doctoral Dissertation (Spring 2026)
  • PBGG 9000: Doctoral Research (Spring 2026)
  • PBGG 7000: Master's Research (Spring 2026)
  • PBGG 7300: Master's Thesis (Spring 2026)
  • PBGG 9000: Doctoral Research (Summer 2026)
  • BIOL 4960R: Faculty-Mentored Undergraduate Research I (Fall 2026)
  • PBGG 9000: Doctoral Research (Fall 2026)
  • AESC 9000: Doctoral Research (Fall 2026)
  • HORT 9000: Doctoral Research (Fall 2026)
  • HORT 9300: Doctoral Dissertation (Fall 2026)

Scholarly Works

  • Domestication-associated reduction of methyl salicylate in tomato root and its significance for resistance to root-knot nematode, NEW PHYTOLOGIST, (2026).
    Wang W, Sapkota M, Zadegan SB, Hewezi T, van der Knaap E … 1 more
  • Multi-variant GWAS and genomic prediction dissect the genetic architecture underlying tomato fruit weight, THEORETICAL AND APPLIED GENETICS, (2026).
    Topcu Y, Adak A, Kayikci HC, Aydin S, Yildiz K … 5 more
  • A FAF-like Protein Regulates Fruit Development in Tomato, (2026).
    Feng Q, van der Knaap E
  • A FAF-like Protein Regulates Fruit Development in Tomato, (2026).
    Feng Q, van der Knaap E
  • Fruit weight regulation by a paralog of Cell Size Regulator (CSR) in tomato and other crops, THEORETICAL AND APPLIED GENETICS, (2026).
    Feng Q, Pereira L, Sapkota M, Karnatam KS, Wang Y … 3 more

View full list of scholarly works

Contact

vanderkn@uga.edu 706-542-4682

Mailing Address

111 Riverbend Road
CAGT Room 124
Athens, GA 30602

Shipping Address

111 Riverbend Road
CAGT Room 124
Athens, GA 30602

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Stories

  • Esther van der Knaap 2022
    Research
    Sept. 24, 2026

    Study traces genetic roots of tomato flavor loss, identifies new pathway for improvement

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  • GMREC Research Technician Clare Johnston collects immature apples
    Research and Education Centers (RECs)
    Oct. 24, 2024

    North Georgia hub fueling agricultural research at UGA

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  • Climate Change
    June 24, 2024

    How UGA plant geneticists are tackling the climate crisis

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  • Horticulture
    April 28, 2023

    Renowned plant geneticist uncovers what influences tomato shape

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  • April 7, 2021

    UGA student investigates why modern tomatoes have lost their flavor

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  • July 30, 2020

    Broad sequencing of tomato genomes will help geneticists breed better varieties

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