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Horticulturae
Special Issues
Advances in Allium Breeding and Genetics, Volume II
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Advances in Allium Breeding and Genetics, Volume II

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 (30 November 2023) | Viewed by 4138

Special Issue Editor

Prof. Dr. Chris S. Cramer

E-Mail Website
Guest Editor
Department of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30003, MSC 3Q, Las Cruces, NM 88003, USA
Interests: onion breeding; plant disease resistance; Fusarium basal rot; Iris yellow spot; onion thrips
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Allium plant species are important worldwide as crop and ornamental plants. They impact our lives on a daily basis. There are many challenges impacting Allium production worldwide. Through breeding and genetics, these challenges can be addressed and overcome.

In this Special Issue, we hope to highlight the research being undertaken to address these challenges using breeding and genetics. We welcome review articles spotlighting the latest research efforts with Alliums and original research papers that highlight the breeding or genetics research your team has conducted with Alliums.

Prof. Dr. Chris S. Cramer
Guest Editor

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

  • disease resistance breeding
  • cultivar development
  • molecular genetics
  • marker-assisted selection

Published Papers (2 papers)

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Research

16 pages, 3854 KiB  
Article
Genetic Diversity Analysis of Onion (Allium cepa L.) from the Arid Region of Tunisia Using Phenotypic Traits and SSR Markers
by Amel Chalbi, Hela Chikh-Rouhou, Najla Mezghani, Amine Slim, Oreto Fayos, Mohamed Sadok Bel-Kadhi and Ana Garcés-Claver
Horticulturae 2023, 9(10), 1098; https://doi.org/10.3390/horticulturae9101098 - 03 Oct 2023
Cited by 3 | Viewed by 1442
Abstract
The present study was carried out to evaluate and characterize, for the first time, the genetic potential of a collection of onion (Allium cepa L.) local accessions from the arid region of southern Tunisia. The genetic diversity among 135 onion individuals, belonging [...] Read more.
The present study was carried out to evaluate and characterize, for the first time, the genetic potential of a collection of onion (Allium cepa L.) local accessions from the arid region of southern Tunisia. The genetic diversity among 135 onion individuals, belonging to 23 accessions, was evaluated using microsatellite (SSR) markers and phenotypic information. A total of 35 alleles were generated with 11 SSRs. The polymorphic information content (PIC) value ranged from 0.08 to 0.95, with an average PIC of 0.43. The expected heterozygosity averaged 0.37, and the observed heterozygosity averaged 0.42. The analysis of molecular variance (AMOVA) revealed that 79% of genetic variation existed within individuals. Structure and cluster analysis grouped the accessions into two major clusters: landraces and pre-breeding lines. For the phenotypic traits evaluated, field trials were conducted in two different environments. Significant differences among accessions were shown, and for most traits, there was also a significant environmental effect and a significant interaction between environment and accession. Great variability was found for all the traits that could be exploited to create new varieties of onion adapted to local conditions by selecting appropriate parents in hybridization breeding. Full article
(This article belongs to the Special Issue Advances in Allium Breeding and Genetics, Volume II)
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13 pages, 1567 KiB  
Article
Selection Progress for Resistance to Fusarium Basal Rot in Short-Day Onions Using Artificial Inoculation Mature Bulb Screening
by Suman Sharma and Christopher S. Cramer
Horticulturae 2023, 9(1), 99; https://doi.org/10.3390/horticulturae9010099 - 12 Jan 2023
Cited by 4 | Viewed by 2264
Abstract
Fusarium basal rot (FBR), caused by a soil-borne fungus, Fusarium oxysporum f. sp. cepae (FOC), is a major disease hindering onion production worldwide. This study was conducted to evaluate the initial and the most advanced selected populations of seven open-pollinated short-day onion cultivars [...] Read more.
Fusarium basal rot (FBR), caused by a soil-borne fungus, Fusarium oxysporum f. sp. cepae (FOC), is a major disease hindering onion production worldwide. This study was conducted to evaluate the initial and the most advanced selected populations of seven open-pollinated short-day onion cultivars for FBR susceptibility, along with two check cultivars using the conidial inoculation of mature bulbs for two consecutive years. The artificial inoculation of mature bulbs was carried out by applying a virulent FOC isolate ‘CSC 515’ at a final concentration of 3.0 × 104 spores mL−1 to the transversely cut basal plates of onion bulbs. The basal plates of 20 arbitrarily chosen bulbs per plot were recut after 20 days of incubation and then were rated for FBR severity using a rating scale of 1 (no disease) to 9 (≥70% of the basal plate is infected). The bulbs with a rating of 1 were saved and then bulked to form the seeds for the next generation. The selected populations exhibited a variable response for FBR severity when evaluated over two years, with an improvement in the most advanced selections observed for a majority of the cultivars. For example, the advanced selections of ‘NuMex Sweetpak’ exceeded the partially resistant check ‘Serrana’ in their levels of resistance when both were evaluated in the second year. A conidial inoculation can be effective in the development of FBR-resistant cultivars. In addition, this inoculation method can accelerate breeding efforts by determining the genetic mechanism(s) responsible for FBR resistance, locating quantitative trait loci, and facilitating marker-assisted selection. Full article
(This article belongs to the Special Issue Advances in Allium Breeding and Genetics, Volume II)
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