Latest Advances and Prospects in Germplasm of Tropical Fruits

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Fruit Production Systems".

Deadline for manuscript submissions: 20 November 2025 | Viewed by 524

Special Issue Editors


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Guest Editor
Department of Germplasm Resources of South Subtropical Crops, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, China
Interests: tropical fruits; germplasm; molecular breeding; postharvest storage; fruit ripening

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Guest Editor
Department of Horticulture, College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
Interests: mango; pitaya; germplasm; crop genetics; flower development

Special Issue Information

Dear Colleagues,

Tropical fruits—such as bananas, litchees, pineapples, mangoes, durians, avocados, and more—are rich in variety and play an important role in enriching and diversifying people's fruit plates. Tropical fruit germplasm is a basic resource of germplasm innovation and genetic breeding, playing a vital role in the development of the tropical fruit industry in tropical regions. These fruits are characterized by an exceptionally rich array of closely related species and genetic diversity, presenting substantial opportunities for development and utilization. In recent years, the collection and preservation of germplasm resources have been given increasing attention by researchers, but there are still many tropical fruit species that have not been fully developed and utilized.

To provide researchers with an overview of the original geographical distribution, collection, conservation, and research into tropical fruit germplasm resources worldwide, this Special Issue, titled "Latest Advances and Prospects in Germplasm of Tropical Fruits", aims to introduce the recent research progress regarding tropical fruit germplasm to researchers worldwide. Innovative articles on the evaluation, identification, and utilization of tropical fruit germplasm and basic research into any of its related resources are welcome in this Special Issue.

Dr. Jingjing Chen
Dr. Qingzhi Liang
Guest Editors

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Keywords

  • tropical fruits
  • germplasm
  • collection
  • evaluation
  • molecular marker
  • genetic resources
  • fruit quality
  • cultivation

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Published Papers (1 paper)

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Research

19 pages, 6079 KiB  
Article
Integrative Genomic and Cytogenetic Analyses Reveal the Landscape of Typical Tandem Repeats in Water Hyacinth
by Liqing Feng, Ying Zhuang, Dagang Tian, Linwei Zhou, Jinbin Wang and Jingping Fang
Horticulturae 2025, 11(6), 657; https://doi.org/10.3390/horticulturae11060657 - 10 Jun 2025
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Abstract
Tandem repeats in eukaryotic genomes exhibit intrinsic instability that drives rapid evolutionary diversification. However, their evolutionary dynamics in allopolyploid species such as the water hyacinth (Pontederia crassipes or Eichhornia crassipes) remain largely unexplored. Our study used integrated genomic and cytogenetic analyses [...] Read more.
Tandem repeats in eukaryotic genomes exhibit intrinsic instability that drives rapid evolutionary diversification. However, their evolutionary dynamics in allopolyploid species such as the water hyacinth (Pontederia crassipes or Eichhornia crassipes) remain largely unexplored. Our study used integrated genomic and cytogenetic analyses of this allotetraploid species to characterize five representative tandem repeats, revealing distinct genomic distribution patterns and copy number polymorphisms. The highly abundant centromeric tandem repeat, putative CentEc, was co-localized with the centromeric retrotransposon CREc, indicating conserved centromeric architecture. Remarkably, putative CentEc sequences showed high sequence conservation (91–100%) despite subgenome divergence, indicative of active concerted evolution. Fluorescence in situ hybridization (FISH) analysis showed ubiquitous telomeric repeats across all chromosomes, while an interstitial chromosome region tandem repeat (ICREc) displayed chromosome-specific localization, both exhibiting copy number variation. Furthermore, differential rDNA organization was observed. 5S rDNA was detected on a single chromosome pair, whereas 35S rDNA exhibited multichromosomal distribution with varying intensities. A comparative analysis of subgenome-specific rDNA sequences revealed substantial heterogeneity in both 5S and 35S rDNA units, suggesting subgenome-biased evolutionary trajectories. Collectively, these findings elucidate the structural and evolutionary significance of tandem repeats in shaping the water hyacinth genome, highlighting mechanisms of concerted evolution and subgenome-biased adaptation in invasive polyploids. Full article
(This article belongs to the Special Issue Latest Advances and Prospects in Germplasm of Tropical Fruits)
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