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Flower Germplasm Resources and Genetic Breeding, 2nd Edition
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Flower Germplasm Resources and Genetic Breeding, 2nd Edition

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Horticultural Science and Ornamental Plants".

Deadline for manuscript submissions: closed (15 April 2025) | Viewed by 2813

Special Issue Editors

Prof. Dr. Lidan Sun

E-Mail Website
Guest Editor
Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
Interests: germplasm resource; molecular breeding; genetic regulation
Special Issues, Collections and Topics in MDPI journals
Dr. Ming Cai

E-Mail Website
Guest Editor
Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Interests: germplasm resource; molecular breeding; plant metabolism

Special Issue Information

Dear Colleagues,

Over the past several decades, significant advances have been made in horticulture germplasm research at both community and individual levels. These advances have especially been achieved along with the availability of new techniques and the genome sequences of flower plants. More specific research is necessary to enhance the basic and applied research on flower genetic resources. This Special Issue of Plants will cover various aspects of flower germplasm, including the following:

  1. Germplasm collection and genetic diversity. These papers should focus on the collection, preservation, and utilization of flower germplasm, as well as the evaluation and broadening of genetic diversity.
  2. Elite germplasm mining with ideal target traits. These papers should focus on the development of QTL mapping approaches and their application to the characterization of the genetic architecture of plant traits using genetic linkage mapping and/or genome-wide association studies. Papers on mapping plant growth traits using functional mapping are particularly welcomed.
  3. New techniques and data reanalysis in germplasm enhancement. These papers should focus on issues that are broadly relevant to the genetics of plant traits. Given the availability of a large number of genomes, transcriptomes, proteomes, and metabolomes across plants, we are interested in submissions that take a holistic approach to survey the data from a new perspective/angle, and/or those which analyze the data using new tools.

Prof. Dr. Lidan Sun
Dr. Ming Cai
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. Plants is an international peer-reviewed open access semimonthly 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 2700 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

  • germplasm resource
  • molecular breeding
  • genetic regulation

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Published Papers (3 papers)

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Research

15 pages, 2554 KiB  
Article
Major Gene with Polygene Inheritance Analysis of Prostrate Growth Habit in Hybrids of Chrysanthemum yantaiense × C. indicum
by Dawei Li, Yuxian Xu, Yuchao Tang, Tongjun Zhou, Hai Li, Ziyu Guo, Yilin Liang, Yuxin Wang, Yuyuan Chen and Ming Sun
Plants 2025, 14(9), 1338; https://doi.org/10.3390/plants14091338 - 29 Apr 2025
Viewed by 421
Abstract
Plant architecture is a crucial trait for ornamental plants. Chrysanthemum with prostrate growth habit is a novel cultivar group of ground-cover chrysanthemum, which have high ornamental value, strong lodging resistance, and outstanding landscape greening capability. To explore the genetic mechanism underlying the prostrate [...] Read more.
Plant architecture is a crucial trait for ornamental plants. Chrysanthemum with prostrate growth habit is a novel cultivar group of ground-cover chrysanthemum, which have high ornamental value, strong lodging resistance, and outstanding landscape greening capability. To explore the genetic mechanism underlying the prostrate growth habit in chrysanthemum, we used tetraploid prostrate-type Chrysanthemum yantaiense as the female parent and erect-type Chrysanthemum indicum as the male parent to produce four generations (P1, P2, F1, F2). Five traits related to prostrate growth habit in chrysanthemum were investigated including plant height (PH), crown width of the plant (CP), creeping index (CI), gravitropic set-point angle (GSA), and growth habit (GH). The major gene plus polygene mixed inheritance analysis was conducted on five traits across four generations over two years. For the five traits, the coefficients of variation (CVs) were wide-ranging and high (16.64–42.75%), with the PH having the highest CV among them. Genetic analysis revealed that PH conformed to the additive-dominant-epistatic polygene model (C-0) and the model of two equally dominant major genes plus additive-dominant polygene (E-5). The most suitable genetic model for CI was an additive-dominant major gene plus additive-dominant-epistatic polygene model (D-0). The best-fit models for CP and GH were both C-0. For GSA, the best-fit models were E-4 and C-0. Additionally, it appeared that both genetic and environmental factors influenced the prostrate growth habit, as the heritability of major genes and polygenes was less than 50%. This study can serve as a theoretical foundation for the mapping of quantitative trait loci (QTLs) and further exploration of the genetic mechanisms underlying plant architecture in chrysanthemum. Full article
(This article belongs to the Special Issue Flower Germplasm Resources and Genetic Breeding, 2nd Edition)
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22 pages, 3844 KiB  
Article
Genetic Analyses of Flower, Fruit, and Stem Traits of Intergeneric Hybrids Between ‘Honghuagqinglong’ and ‘Heilong’ Pitayas
by Xinyue Pu, Imran Khan, Tiantian Zhang, Guohua Huang, Jiayi Chen, Yu Ding, Xuewu Ji, Zhike Zhang, Jietang Zhao, Guibing Hu, Irfan Ali Sabir and Yonghua Qin
Plants 2024, 13(24), 3546; https://doi.org/10.3390/plants13243546 - 19 Dec 2024
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Abstract
Pitaya is renowned for its delicious taste, high nutritional value, and economic as well as ornamental appeal. Breeding new pitaya varieties can boost economic returns by appealing to consumers with diverse morphological traits. However, the genetic basis underlying key traits in intergeneric hybrids [...] Read more.
Pitaya is renowned for its delicious taste, high nutritional value, and economic as well as ornamental appeal. Breeding new pitaya varieties can boost economic returns by appealing to consumers with diverse morphological traits. However, the genetic basis underlying key traits in intergeneric hybrids of pitaya has yet to be fully understood. This study investigates the genetic dynamics in flower, fruit, and stem traits, including segregation patterns and a mixed inheritance model for major and polygenic traits, in an intergeneric hybridization between ‘Honghuagqinglong’ (HHQL) (Hylocereus stenopterus) and ‘Heilong’ (HL) (Selenicereus grandiflorus). The study identified normal or skewed, normal distribution patterns in seven floral, fifteen fruit, and five stem traits, indicating their quantitative nature governed by multiple genes. Specifically, flower size and color exhibited a hereditary bias towards ‘HL’ characteristics, while ‘HHQL’ significantly influenced the coloration of fruit peel and pulp. Fruit weight and total soluble solids (TSS) content decreased, whereas stem traits exhibited broader and thicker dimensions with fewer thorns. This study offers valuable insights into genetic variation and the influence of major genes on flower, fruit, and stem traits between ‘HHQL’ and ‘HL’ intergeneric hybrids, providing a useful reference for parental selection in pitaya breeding programs. Full article
(This article belongs to the Special Issue Flower Germplasm Resources and Genetic Breeding, 2nd Edition)
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15 pages, 8520 KiB  
Article
Floral Developmental Morphology and Biochemical Characteristics of Male Sterile Mutants of Lagerstroemia indica
by Fuyuan Deng, Liushu Lu, Lu Li, Jing Yang, Yi Chen, Huijie Zeng, Yongxin Li and Zhongquan Qiao
Plants 2024, 13(21), 3043; https://doi.org/10.3390/plants13213043 - 30 Oct 2024
Viewed by 1078
Abstract
Male sterility is a common phenomenon in higher plants and often plays an important role in the selection of superior offspring. ‘Xiang Yun’ is a mutant of Lagerstroemia indica that does not bear fruit after flowering, and its flowering period is significantly longer [...] Read more.
Male sterility is a common phenomenon in higher plants and often plays an important role in the selection of superior offspring. ‘Xiang Yun’ is a mutant of Lagerstroemia indica that does not bear fruit after flowering, and its flowering period is significantly longer than that of normal L. indica. To explore the timing and molecular mechanisms of sterility in ‘Xiang Yun’, this study determined the period of sterility through anatomical observation and compared the content of nutrients and the activity of antioxidative enzymes at different stages of flower development. Finally, sequence alignment and qPCR were used to analyze the differences in pollen development genes between ‘Xiang Yun’ and ‘Hong Ye’. The results showed that the anthers of ‘Xiang Yun’ dispersed pollen normally, but the pollen grains could not germinate normally. Observations with scanning electron microscopy revealed that the pollen grains were uneven in size and shriveled in shape. Further observation of anther sections found that abnormal development of the microspores began at the S2 stage, with the callose wall between microspores of ‘Xiang Yun’ being thicker than that of ‘Hong Ye’. In addition, during the flower development of ‘Xiang Yun’, the contents of soluble sugar, soluble protein, free proline, and triglycerides were deficient to varying degrees, and the activities of POD, SOD, and MDA were lower. Sequence alignment and qPCR showed that there were several mutations in EFD1, TPD1, and DEX1 of ‘Xiang Yun’ compared with ‘Hong Ye’, and the expression levels of these genes were abnormally elevated in the later stages of development. Our results clarified the timing and phenotype of male sterility in ‘Xiang Yun’. This provides solid and valuable information for further research on the molecular mechanism of sterility in ‘Xiang Yun’ and the genetic breeding of crape myrtle. Full article
(This article belongs to the Special Issue Flower Germplasm Resources and Genetic Breeding, 2nd Edition)
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