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Horticulturae
Special Issues
Collection, Evaluation and Utilization of Watermelon and Melon Germplasm Resources
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Collection, Evaluation and Utilization of Watermelon and Melon Germplasm Resources

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: closed (25 March 2024) | Viewed by 5268

Special Issue Editors

Dr. Chunhua Wei

E-Mail Website
Guest Editor
State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China
Interests: germplasm resources; stress tolerance; multi-omics; gene miming
Special Issues, Collections and Topics in MDPI journals
Dr. Ruimin Zhang

E-Mail Website
Guest Editor
College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Interests: watermelon and melon; germplasm resources; breeding; resistance; nutrition quality; cultivation quality; maker development
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Watermelon and melon are economically important cucurbit crops, widely cultivated around the world because of their juicy, sweet, and nutritious fruit. Collections, evaluation and creation of germplasm resources are foundation of the plant breeding. Establishing a system for stress resistance evaluation, screening resistant and high-quality germplasm resources, and developing functional molecular markers can serve as solid bases for the development of novel plant resources or varieties with high levels of resistance and better fruit quality and potential yield.

This Special Issue will include research on the collection, evaluation, and utilization of watermelon and melon germplasm resources, such as high resistance (salt, drought, cold, disease), excellent nutrition and cultivation quality (superior nutrients, optimal plant-type), and other innovative germplasms, and underlying functional molecular marker development. Here, we invite you to submit exciting research developments to us.

Dr. Chunhua Wei
Dr. Ruimin Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Horticulturae is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • watermelon and melon
  • germplasm resources
  • germplasm enhancement
  • germplasm evaluation
  • germplasm utilization
  • germplasm creation
  • stress tolerance
  • resistance
  • nutrition quality
  • cultivation quality
  • multi-omics
  • gene miming
  • breeding
  • maker development

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Published Papers (2 papers)

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Research

13 pages, 4173 KiB  
Article
A Comparison of Watermelon Flesh Texture across Different Ploidy Levels Using Histology and Cell Wall Measurements
by Xuqiang Lu, Nan He, Muhammad Anees, Dongdong Yang, Weikang Kong, Jiwen Zhang, Luming Yuan, Xiaowen Luo, Hongju Zhu and Wenge Liu
Horticulturae 2024, 10(2), 112; https://doi.org/10.3390/horticulturae10020112 - 24 Jan 2024
Cited by 2 | Viewed by 2250
Abstract
Watermelon fruits of different ploidy levels exhibit significant variations in texture. This study aimed to investigate the primary factors that influence texture differences. To achieve this, we conducted an investigation into the differences in fruit texture development using homozygous autogamous diploid (2×) lines [...] Read more.
Watermelon fruits of different ploidy levels exhibit significant variations in texture. This study aimed to investigate the primary factors that influence texture differences. To achieve this, we conducted an investigation into the differences in fruit texture development using homozygous autogamous diploid (2×) lines and their autotriploid (3×) and autotetraploid (4×) lines ‘Yixuan’. The study investigated fruit development, flesh texture profile analysis (TPA), flesh cell wall polysaccharide content, and flesh cell microstructure analysis in 2×, 3×, and 4× watermelon fruits. The study found that as watermelon fruits matured, several characteristics increased, including fruit weight, TSS (total soluble solids) content, rind hardness, flesh cell size, and cell wall polysaccharide contents such as crude fiber, cellulose, hemicellulose, lignin, and protopectin. In contrast, the flesh texture parameters and soluble pectin content of the flesh cell wall decreased over time. Significant differences in fruit flesh texture and flesh cell structure were observed among fruits of different ploidy levels at the 32 DAP. Specifically, the 2× fruits displayed considerably lower rind hardness, reduced flesh texture (Hardness, Fracturability, Chewiness, Gumminess), and cell density compared to the 3× and 4× fruits. Additionally, the 2× fruits had larger cell sizes than the 3× and 4× fruits. However, there were no significant differences observed in the flesh cell wall polysaccharide contents across various ploidy levels. These findings suggest that the variation in texture among watermelon fruits of different ploidy levels can be attributed to the size and arrangement of the flesh cells. This research provides a foundation for the further exploration of the intrinsic regulatory factors and molecular mechanisms contributing to texture variation in polyploid watermelon fruits. Full article
(This article belongs to the Special Issue Collection, Evaluation and Utilization of Watermelon and Melon Germplasm Resources)
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13 pages, 2625 KiB  
Article
Construction of Watermelon Mutant Library Based on 60Co γ-ray Irradiation and EMS Treatment for Germplasm Innovation
by Lijuan Yin, Yinjie Hou, Xiaoyao Chen, Xin Huang, Mengjiao Feng, Chunxia Wang, Zhongyuan Wang, Zhen Yue, Yong Zhang, Jianxiang Ma, Hao Li, Jianqiang Yang, Xian Zhang, Rong Yu and Chunhua Wei
Horticulturae 2023, 9(10), 1133; https://doi.org/10.3390/horticulturae9101133 - 13 Oct 2023
Cited by 1 | Viewed by 2384
Abstract
Watermelon is a crucial horticultural crop worldwide but its genetic base has become extremely narrow owing to long-term cultivation. Induced mutagenesis can create a range of variations with distinctive agricultural characteristics. To broaden the genetic diversity of watermelon, we established a mutagenesis library [...] Read more.
Watermelon is a crucial horticultural crop worldwide but its genetic base has become extremely narrow owing to long-term cultivation. Induced mutagenesis can create a range of variations with distinctive agricultural characteristics. To broaden the genetic diversity of watermelon, we established a mutagenesis library containing over 4000 M1 seeds from an inbred line ‘M08’, which was irradiated by 350 Gy of 60Co γ-rays for 3 h. The rates of germination, emergence, and survival of the M1 seeds were reduced by 5.88%, 18.66%, and 41.96%, respectively. After phenotypic screening, 20 and 10 types of morphological changes were observed in the M1 and M2 generations, with approximately 10.57% and 14.17% mutation frequencies, respectively. Six mutants with desirable horticultural alterations were selected for additional presentation, including the leaf color mutant C1-NO.1, the yellow peel mutant C1-NO.2, the pericarp thickening mutant C1-NO.3, the pericarp thinning mutant C1-NO.4, the seedless mutant C1-NO.5, and the C2-No.1 mutant with normal female flowers and malformed male flowers. Moreover, the three mutants M1-3, M2-1, and M1-5 were identified from our EMS-induced M2 library, exhibiting the fusiform fruit, the dark green peel, and the yellow leaves, respectively. Compared to the wild type (WT), the photosynthetic pigments and parameters were negatively impacted in the yellow-leaf mutant M1-5. For example, the total chlorophyll was 1.22 and 2.22 mg/g in the young and mature leaves of M1-5, respectively, which were significantly lower than those in the WT (2.58 and 2.90 mg/g, respectively). Notably, some mutagenesis phenotypes could be stably inherited, including traits such as yellow leaf color, fusiform fruit shape, and thickening and thinning pericarp. Taken together, these results indicate that these two mutant libraries serve as essential resources to discover new phenotypic germplasms, thereby facilitating the genetic breeding and functional gene exploration in watermelon. Full article
(This article belongs to the Special Issue Collection, Evaluation and Utilization of Watermelon and Melon Germplasm Resources)
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