Advances in Germplasm Resources and Genetic Improvement of Tropical 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: 10 July 2024 | Viewed by 507

Special Issue Editors


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Guest Editor
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 572829, China
Interests: germplasm resources; breeding; biotechnology

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Guest Editor
College of Tropical Crops, Hainan University, Haikou 570228, China
Interests: coconut molecular breeding; coconut genomics; GWAS
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Special Issue Information

Dear Colleagues,

Tropical crops are important economic crops in more than 100 tropical countries around the world. Tropical horticultural crops, including tropical fruit trees, tropical unique vegetables, and tropical flowers, are important components of tropical crops. Germplasm resources are the genetic source for improving crops. The preservation method of germplasm resources has shifted from in situ preservation to facility preservation (germplasm bank, test-tube seedling bank, ultra-low temperature storage, germplasm nursery, DNA bank). In recent years, the accurate evaluation of collected germplasm resources using molecular biological techniques has become a research hotspot. The identification of phenotypic traits has shifted from single-environment, low-throughput, extensive identification to multi-year, multi-environment, focused traits, high-throughput, and accurate identification. With the rapid development of omics technology, intelligence, and information technology, reliable means have been provided for accurate and rapid exploration and application of important traits, and identification and evaluation have entered a new stage. At the same time, aiming at breeding objectives such as high yield, high quality, disease resistance, insect resistance, and stress resistance, a large number of excellent germplasm have been created through natural or artificial variation, artificial hybridization, seedling selection, induced mutation, distant hybridization, gene editing, and other techniques and methods. These achievements have laid a good foundation for tropical crop breeding. With the advancement of technology, the genetic improvement of tropical crops is shifting from molecular markers, whole genome selection, and transgenosis to multi-omics, big data, genome design, gene editing, synthetic biology, and artificial intelligence.

We welcome the submission of articles from the following areas:

  1. New progress in the preservation of germplasm resources;
  2. New strategies for germplasm resource innovation;
  3. Accurate evaluation of germplasm resources;
  4. New technologies and methods for genetic improvement of germplasm resources;
  5. Cultivation of new varieties.

Prof. Dr. Xintao Lei
Dr. Yong Xiao
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

  • tropical horticultural crop
  • germplasm resources
  • new germplasm creation
  • accurate evaluation
  • genetic improvement

Published Papers (1 paper)

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Research

15 pages, 3384 KiB  
Article
Analysis of Combining Ability to Obtain Tropical Carrot Hybrids for Production Traits
by Fernanda Gabriela Teixeira Coelho, Gabriel Mascarenhas Maciel, Ana Carolina Silva Siquieroli, Camila Soares de Oliveira, Nádia Nardely Lacerda Durães Parrella, Amilton Ferreira da Silva, José Magno Queiroz Luz and Ana Paula Oliveira Nogueira
Horticulturae 2024, 10(5), 442; https://doi.org/10.3390/horticulturae10050442 - 26 Apr 2024
Viewed by 330
Abstract
Carrots (Daucus carota L.), a globally significant vegetable, lack extensive research on heterotic groups and diallel analysis to generate hybrid combinations. Thus, the objective of this study was to assess combining abilities and identify optimal carrot parents for producing hybrids suitable for [...] Read more.
Carrots (Daucus carota L.), a globally significant vegetable, lack extensive research on heterotic groups and diallel analysis to generate hybrid combinations. Thus, the objective of this study was to assess combining abilities and identify optimal carrot parents for producing hybrids suitable for tropical climates with elevated metabolite levels. Twenty carrot hybrids, ten parent plants, and three commercial cultivars were evaluated during the summers of 2020/2021 and 2021/2022. Agronomic evaluations were carried out and chlorophyll and carotenoid levels were determined, followed by a diallel analysis using Griffing’s Method III and GGE biplot analysis. There were significant general combining ability (GCA) effects for various agronomic traits, suggesting additive genetic effects. Based on GCA, cultivars 5, 4, and 2 were the most promising parents. Specific combining ability (SCA) revealed that hybrids 1 × 2 and 3 × 5 stood out in environment 1, whereas hybrids 1 × 5 and 5 × 3 performed well in environment 2. The GGE biplot analysis showed that hybrids 1 × 2 and 3 × 2 displayed larger average root diameters, belonged to the group with the best bolting percentages, and exhibited stability across environments. Moreover, hybrids 2 × 4, 3 × 1, 4 × 1, and 4 × 2 exhibited higher metabolite levels. These findings suggest the feasibility of obtaining superior hybrids tailored for the tropical carrot market. Full article
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