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Horticulturae
Special Issues
Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals
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Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Floriculture, Nursery and Landscape, and Turf".

Deadline for manuscript submissions: closed (15 May 2023) | Viewed by 6223

Special Issue Editors

Dr. Hamidou F. Sakhanokho

E-Mail Website
Guest Editor
Thad Cochran Southern Horticultural Laboratory, USDA-ARS, Poplarville, MS 39470, USA
Interests: ornamental and small fruit breeding and genetics; mutation breeding; ploidy manipulation; development of germplasms tolerant to biotic and abiotic stresses; tissue culture and transformation; molecular cytogenetics.
Dr. Nurul Islam-Faridi

E-Mail Website
Guest Editor
United States Department of Agriculture, Forest Service, Southern Research Station, Southern Institute of Forest Genetics, Forest Tree Molecular Cytogenetics Laboratory, College Station, TX 77843, USA
Interests: cytogenetics of southern pines and hardwoods (Populus, Castanea, Fraxinus, Quercus spp.); comparative cytogenetics and genomics of southern pines and hardwoods; organization and distribution of rRNA genes, and distribution of repetitive DNA and transposable elements in tree genomes

Special Issue Information

Dear Colleagues,

This Special Issue of "Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals" is to bring together new ideas, techniques, and technologies on genetic improvement of horticultural plants, including fruits, vegetables, aromatics, medicinal, and ornamental plants. Ornamental plants are prized for their aesthetical value, so genetic improvement of both foliage and flower color is necessary to meet the constant changing taste of consumers. Both these traits—foliage and flower color—can be affected by biotic and abiotic stresses. In addition, traits such as compactness, particularly in urban dwellings, are increasingly desired. This Special Issue welcomes original research, short communication, reviews, and methods focused on any areas of the genetic improvement of horticultural plants, such as breeding (classical and molecular), tissue culture and transformation, mutation breeding, cytogenetics, etc.

Dr. Hamidou F. Sakhanokho
Dr. Nurul Islam-Faridi
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

  • cultivar development
  • disease resistance breeding
  • wide crosses
  • transcriptome sequencing
  • differential gene expression
  • genome sequencing and characterization
  • abiotic stress tolerance
  • ploidy manipulation
  • mutation breeding
  • somaclonal variation
  • molecular cytogenetics
  • apomixis

Published Papers (3 papers)

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Research

17 pages, 55980 KiB  
Article
Genome Size, Flowering, and Breeding Compatibility in Osmanthus Accessions
by Lisa Alexander
Horticulturae 2023, 9(1), 56; https://doi.org/10.3390/horticulturae9010056 - 03 Jan 2023
Cited by 1 | Viewed by 1192
Abstract
Extending the range of Osmanthus species into more cold-hardy climates would open new opportunities for adoption and use of these species by growers, landscapers, and the public. Breeding improvement is hindered by few available cultivars and a lack of female or perfect flowers. [...] Read more.
Extending the range of Osmanthus species into more cold-hardy climates would open new opportunities for adoption and use of these species by growers, landscapers, and the public. Breeding improvement is hindered by few available cultivars and a lack of female or perfect flowers. The objectives of this study were to evaluate floral morphology and pollination biology of Osmanthus species available in the U.S. market. Thirty-three genotypes representing four species were evaluated in McMinnville, TN, USA for genome size, floral morphology, pollen viability, and self- and cross-compatibility. All genotypes were diploid with 2C genome sizes ranging from 2.89 to 3.21 pg. Perfect flowers were observed in all O. armatus and 82% of O. heterophyllus genotypes. All observed O. fortunei and O. fragrans genotypes had male-only flowers. Pollen viability based on staining and in vitro germination ranged from 8% to 98% and 6% to 53%, respectively. Pollen germination was observed on stigmas of 94.2% of O. armatus and O. heterophyllus flowers collected 24 hours after cross- or self-pollination. There was a significant association between cross type and percentage of flowers with pollen tubes reaching the ovaries; after 72 h, pollen tubes had reached the ovaries of in 67% of intraspecific crosses, 78% of interspecific crosses, and 0% of self crosses (χ2 = 26.5, p < 0.001). This study provides evidence of a self-incompatibility system in O. armatus and O. heterophyllus and provides insights into opportunities and challenges for Osmanthus hybrid breeding. Full article
(This article belongs to the Special Issue Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals)
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18 pages, 33794 KiB  
Article
Complete Chloroplast Genome Sequence of Rosa lucieae and Its Characteristics
by Weixiang Shen, Zhanghong Dong, Wenzhi Zhao, Luyao Ma, Fei Wang, Weiying Li and Peiyao Xin
Horticulturae 2022, 8(9), 788; https://doi.org/10.3390/horticulturae8090788 - 30 Aug 2022
Cited by 3 | Viewed by 1650
Abstract
Rosa lucieae is one of the famous wild ancestors of cultivated roses and plays a very important role in horticultural research, but there is still a lack of research on the R. lucieae chloroplast genome. In this study, we used the Illumina MiSeq [...] Read more.
Rosa lucieae is one of the famous wild ancestors of cultivated roses and plays a very important role in horticultural research, but there is still a lack of research on the R. lucieae chloroplast genome. In this study, we used the Illumina MiSeq platform for sequencing, assembly, and annotation to obtain the R. lucieae chloroplast genome sequencing information and compared genomics, selection stress analysis, and phylogenetic analysis with 12 other chloroplast genomes of Rosa. The R. lucieae cpDNA sequence has a total length of 156,504 bp, and 130 genes are annotated. The length of all 13 studied chloroplast genomes is 156,333~157,385 bp. Their gene content, gene sequence, GC content, and IR boundary structure were highly similar. Five kinds of large repeats were detected that numbered 100~116, and SSR sequences ranged from 78 to 90 bp. Four highly differentiated regions were identified, which can be used as potential genetic markers for Rosa. Selection stress analysis showed that there was significant positive selection among the 18 genes. The phylogenetic analysis of R. lucieae and R. cymose, R. maximowicziana, R. multiflora, and R. pricei showed the closest relationship. Overall, our results provide a more comprehensive understanding of the systematic genomics and comparative genomics of Rosa. Full article
(This article belongs to the Special Issue Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals)
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11 pages, 1431 KiB  
Article
Characterization of Genomic Variation from Lotus (Nelumbo Adans.) Mutants with Wide and Narrow Tepals
by Fengluan Liu, Mi Qin, Shuo Li, Dasheng Zhang, Qingqing Liu, Mengxiao Yan and Daike Tian
Horticulturae 2021, 7(12), 593; https://doi.org/10.3390/horticulturae7120593 - 20 Dec 2021
Viewed by 2643
Abstract
Compared with rose, chrysanthemum, and water lily, the absence of short-wide and long-narrow tepals of ornamental lotus (Nelumbo Adans.) limits the commercial value of flowers. In this study, the genomes of two groups of lotus mutants with wide-short and narrow-long tepals were [...] Read more.
Compared with rose, chrysanthemum, and water lily, the absence of short-wide and long-narrow tepals of ornamental lotus (Nelumbo Adans.) limits the commercial value of flowers. In this study, the genomes of two groups of lotus mutants with wide-short and narrow-long tepals were resequenced to uncover the genomic variation and candidate genes associated with tepal shape. In group NL (short for N. lutea, containing two mutants and one control of N. lutea), 716,656 single nucleotide polymorphisms (SNPs) and 221,688 insertion-deletion mutations (Indels) were obtained, while 639,953 SNPs and 134,6118 Indels were obtained in group WSH (short for ‘Weishan Hong’, containing one mutant and two controls of N. nucifera ‘Weishan Hong’). Only a small proportion of these SNPs and Indels was mapped to exonic regions of genome: 1.92% and 0.47%, respectively, in the NL group, and 1.66% and 0.48%, respectively, in the WSH group. Gene Ontology (GO) analysis showed that out of 4890 (NL group) and 1272 (WSH group) annotated variant genes, 125 and 62 genes were enriched (Q < 0.05), respectively. Additionally, in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database, 104 genes (NL group) and 35 genes (WSH group) were selected (p < 0.05). Finally, there were 306 candidate genes that were sieved to determine the development of tepal shape in lotus plants. It will be an essential reference for future identification of tepal-shaped control genes in lotus plants. This is the first comprehensive report of genomic variation controlling tepal shape in lotus, and the mutants in this study are promising materials for breeding novel lotus cultivars with special tepals. Full article
(This article belongs to the Special Issue Genetic Improvement of Horticultural Plants with Special Emphasis on Ornamentals)
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