Germplasm Resources and Genetic Improvement of Cucurbit Crops

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Genetics, Genomics, Breeding, and Biotechnology (G2B2)".

Deadline for manuscript submissions: 15 July 2026 | Viewed by 861

Special Issue Editors


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Guest Editor
Yuelushan Lab, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
Interests: cucumber; gene; genomics; breeding; development; germplasm

E-Mail Website
Guest Editor
College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Interests: melon; watermelon; genetic mapping, gene function analysis
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Special Issue Information

Dear Colleagues,

Cucurbit crops (watermelon, melon, cucumber, pumpkin, etc.) are nutritionally and economically important worldwide yet confront challenges from climate change, biotic stresses (e.g., powdery mildew, fusarium wilt) and rising demand for high-quality varieties. This Special Issue focuses on latest advances in their germplasm resources and genetic improvement, bridging basic research with sustainable production.

For germplasm, studies include collecting wild and landrace accessions (key reservoirs of stress-resistance genes) and analyzing genetic diversity via molecular markers (e.g., SNP) or multi-omics tools. In breeding, contributions cover traditional methods (hybridization, mutagenesis) and modern biotechnologies—such as CRISPR/Cas9 for precise enhancement of fruit traits and disease resistance and marker-assisted selection (MAS) to accelerate trait pyramiding.

This Issue integrates diverse research, serving as a valuable reference for advancing cucurbit productivity and resilience.

Prof. Dr. Chunhua Wang
Prof. Dr. Shi Liu
Guest Editors

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Keywords

  • cucurbit crops
  • germplasm resources
  • genetic improvement
  • molecular breeding
  • genetic diversity
  • marker-assisted selection
  • CRISPR/Cas9

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Published Papers (1 paper)

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Research

18 pages, 4517 KB  
Article
Isolation of CsHB33 from Cucumber and Its Ectopic Expression in Arabidopsis Promotes Leaf Growth but Impairs Drought Tolerance
by Jiajian Cao, Wancong Feng, Xiaokai Liu, Ning Hao, Huiming Chen, Tao Wu, Chunhua Wang and Junwei Wang
Horticulturae 2026, 12(3), 344; https://doi.org/10.3390/horticulturae12030344 - 12 Mar 2026
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Abstract
The ZF-HD transcription factors play key roles in plant development and stress responses, yet their functions in cucumber remain poorly understood. Here, we characterized a cucumber ZF-HD gene, CsHB33, and investigated its role in leaf development and drought tolerance. CsHB33 was highly [...] Read more.
The ZF-HD transcription factors play key roles in plant development and stress responses, yet their functions in cucumber remain poorly understood. Here, we characterized a cucumber ZF-HD gene, CsHB33, and investigated its role in leaf development and drought tolerance. CsHB33 was highly expressed in developing leaves. Its expression was significantly suppressed by abscisic acid (ABA) and down-regulated under drought stress. Heterologous overexpression of CsHB33 in Arabidopsis promoted leaf growth by increasing cell size, but simultaneously enhanced sensitivity to osmotic and drought stress, accompanied by higher stomatal aperture and water loss. Transcriptomic analysis revealed that CsHB33 overexpression up-regulated genes associated with leaf enlargement, while under drought it led to constitutive activation of aromatic amino acid biosynthesis, particularly tryptophan metabolism. This metabolic disturbance likely contributes to the drought-sensitive phenotype. Our findings reveal that CsHB33 exerts opposing effects on leaf growth and drought tolerance, providing new insights into ZF-HD gene function in cucumber and identifying a potential target for improving stress resilience in breeding. Full article
(This article belongs to the Special Issue Germplasm Resources and Genetic Improvement of Cucurbit Crops)
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