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Special Issue "Taxonomy, Genomics and Genetic Diversity of Ornamental Plants"

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A special issue of Diversity (ISSN 1424-2818). This special issue belongs to the section "Plant Diversity".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 2501

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Special Issue Editors

Prof. Dr. Daike Tian

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Guest Editor

Shanghai Chenshan Botanical Garden, Chenshan Plant Research Center of CAS Center for Excellence in Molecular Plant Science, Songjiang, Shanghai 201602, China
Interests: taxonomy; diversity evaluation; conservation; breeding and commercialization of ornamental plants; genetic mechanisms in plant morphology and development

Dr. Yanlin Li

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Guest Editor

Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding of Ministry of Education, College of Horticulture, Hunan Agricutlure of University, Changsha 410128, China
Interests: ornamental plants; genetic diversity and conservation; evolution and ecology of secondary metabolites; phylogenetic analysis

Special Issue Information

Dear Colleagues,

Ornamental plants refer to all plants with ornamental values, generally with beautiful flowers, leaves, shapes, or other appealing traits for people to enjoy. Ornamental plants have a huge diversity in species and cultivars, including herbs, shrubs, and trees, which spread over tropical, subtropical, and temperate zones. In recent years, with the rapid development of molecular biology and genomics, the taxonomy, germplasm evaluation, and genetic breeding of ornamental plants have entered a new era.

This Special Issue will focus on recent advances in the "Taxonomy, Genomics, and Genetic Diversity of Ornamental Plants". We welcome any research papers or reviews related to this topic, including molecular biology, metabolomics, and bioinformatics of ornamental plants.

Prof. Dr. Daike Tian
Dr. Yanlin Li
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. Diversity 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 2600 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

ornamental plants
biodiversity
molecular biology
taxonomy
genomics
metabolomics
bioinformatics

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Research

Open AccessArticle

Transcriptomic Analysis of Medicago truncatula under Long-Day Conditions

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Diversity 2023, 15(9), 1020; https://doi.org/10.3390/d15091020 - 15 Sep 2023

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Abstract

The objective of this research was to understand the expression characteristics and biological functions of Medicago truncatula genes under long-day conditions. The leaves of “R108” tribulus Medicago truncatula at the branch stage (A), bud stage (B), initial flowering stage (C), and full flowering stage (D) were sequenced using RNA-Seq technology. The genome of Medicago truncatula, a related species of Medicago truncatula, was used as the reference genome for sequence comparison. The transcriptomes of three adjacent periods (A vs. B, B vs. C, and C vs. D) were analyzed for differential gene expression and these genes were screened. A total of 6875 differentially expressed genes were detected. GO functional analysis showed that differentially expressed genes were mainly involved in biological processes, cell components, and molecular functions, among which the most differentially expressed genes were involved in the synthesis of cell components. KEGG enrichment analysis showed that the differentially expressed genes were mainly involved in circadian rhythm, photosynthetic antenna protein, ribosome metabolism, and other pathways. The number of single nucleotide variants detected by cSNP analysis was 312,875, and the frequency of A/G and C/T were the highest. The function of eggNOG was divided into 23 categories, with a total of 26,745 genes having similarities, while 9008 genes were classified as having an unknown function, 2669 genes were classified as part of signal transduction mechanisms, and 2194 genes were classified as being involved in transcription. In different developmental stages (A vs. B, B vs. C, and C vs. D), 3463 up-regulated and 3412 down-regulated differentially expressed genes were found. The difference between up-regulated and down-regulated genes was more noteworthy at the bud stage and the initial flowering stage. In addition, a total of 79 flowering genes were found, of which 51 differential genes were identified as participating in the photoperiodic regulation pathway, consisting of 23 differential genes that were up-regulated, and 28 differential genes that were down-regulated. The ratios of gene-LOC11410562(GI), gene-LOC11435974(CO), gene-LOC11422615(TOC1), and gene-LOC11432385(LHY) were higher than those of gene-LOC25500742(PHYA) and gene-LOC11 431402(ELF3); gene-LOC11434778(Col13), gene-LOC25498015(Col6), and gene-LOC11415514(Col9) were pre-expressed. The above differentially expressed genes were significantly expressed in different developmental stages of Medicago truncatula, which lays a foundation for further study of the molecular mechanism of Medicago truncatula. Full article

(This article belongs to the Special Issue Taxonomy, Genomics and Genetic Diversity of Ornamental Plants)

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Open AccessArticle

Phylogenomic Analysis of Two Species of Parasenecio and Comparative Analysis within Tribe Senecioneae (Asteraceae)

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Diversity 2023, 15(4), 563; https://doi.org/10.3390/d15040563 - 17 Apr 2023

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Abstract

The genus of Parasenecio (Senecioneae) comprises about 70 species of high medicinal value. In this study, the plastomes of Parasenecio palmatisectus and P. latipes were newly sequenced using high-throughput sequencing technology and compared with those of eight other species in Senecioneae. The complete chloroplast (cp) genomes were 151,185 bp in P. latipes with 37.5% GC and 151,263 bp in P. palmatisectus with 37.5% GC. We predicted 133 genes, including 37 tRNA genes, 86 protein-coding genes, 8 rRNA genes, and 2 pseudogenes (ycf1 and rps19). A comparative genomic analysis showed that the complete cp genome sequences of Parasenecio species and their related species were relatively conserved. A total of 49 to 61 simple sequence repeats (SSRs) and 34 to 46 interspersed repeat sequences were identified in the 10 Senecioneae species of plastomes. Within the tribe Senecioneae, single-copy regions were more variable than inverted repeats regions, and the intergenic regions were more variable than the coding regions. Two genic regions (ycf1 and ccsA) and four intergenic regions (trnC-GCA-petN, ycf1-trnN-GUU, psaI-ycf4, and rpl32-trnL-UAG) were identified as highly valuable plastid markers. A phylogenetic analysis under maximum likelihood revealed that the two Parasenecio species are sister to the genera of Ligularia and Sinosenecio in the tribe Senecioneae. This study also contributes to the super-barcode, phylogenetic, and evolutionary studies of Parasenecio plants. Full article

(This article belongs to the Special Issue Taxonomy, Genomics and Genetic Diversity of Ornamental Plants)

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Open AccessArticle

Phenotypic Diversity Analysis of the Progeny Variation of a ‘Mosaic Leaf’ Loropetalum chinense var. rubrum Based on Flower Organ Characteristics

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Diversity 2022, 14(11), 913; https://doi.org/10.3390/d14110913 - 27 Oct 2022

Cited by 1 | Viewed by 865

Abstract

Loropetalum chinense var. rubrum is a common landscape plant. Because of the preference for the ‘red leaf’ trait, the ‘flower color’ trait was ignored in breeding, and the genetic diversity of L. chinense var. rubrum was replaced by a few genotypes. Therefore, the potential value of flower color traits was affected, and the genetic diversity was not fully exploited. In this study, we utilized a cultivar with mosaic-colored flowers and leaves and observed 15 phenotypic traits in its flower organs and its progeny, as well as a total of 60 different flower color materials. We analyzed the variation characteristics and diversity of flower colors, and qualitatively described and preliminarily classified flower colors using the ISCC-NBS and CIELab systems to explore the correlation with the flower color phenotype from the distribution and content of anthocyanins. The phenotypic diversity of the flower organs was enriched, and genetic differences in flower color were significant for the L.chinense var. rubrum, with most of the 15 phenotypic traits showing significant positive correlations, and the most critical phenotypes are sepal, petal and nectary color, as well as petal length. According to the CIELab color system and anthocyanin content and distribution characteristics, it is considered more accurate and convenient to classify the color phenotypes of L. chinense var. rubrum flowers into five categories. In this study, for the first time, the flower organ phenotype of L. chinense var. rubrum has been systematically analyzed, and it is explored as a reference method for breeding new cultivars of a diverse range of colors in L. chinense var. rubrum. Full article

(This article belongs to the Special Issue Taxonomy, Genomics and Genetic Diversity of Ornamental Plants)

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