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Molecular evidence for natural hybridization between Rumex crispus and R. obtusifolius (Polygonaceae) in Korea. Sci Rep 2022; 12:5423. [PMID: 35361815 PMCID: PMC8971494 DOI: 10.1038/s41598-022-09292-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/21/2022] [Indexed: 11/09/2022] Open
Abstract
Interspecific hybridization has been suggested to occur frequently in Rumex (Polygonaceae). Several hypothesized combinations of parental species of hybrids based on their intermediate morphology have been suggested in the genus, but few of them have been phylogenetically tested. We analyzed nuclear and chloroplast DNA sequence data of a putative natural hybrid between Rumex crispus and Rumex obtusifolius from Korea to confirm its hybrid status and to determine the maternal parent. Analysis of the nuclear DNA pgiC region revealed that R. crispus and R. obtusifolius have contributed to the nuclear genome of the putative hybrids. The haplotype distribution pattern inferred from the combined sequence data set of five chloroplast DNA regions (matK, rbcL-accD IGS, trnK-rps16 IGS, ycf6-psbM IGS and psbA-trnH IGS) indicated bidirectional hybridization events between R. crispus and R. obtusifolius. This paper provides the first molecular evidence for interspecific hybridization between R. crispus and R. obtusifolius. In addition, our findings strongly suggested that Korean populations of Rumex japonicus have a hybrid origin, and R. crispus may represent one of the parental taxa.
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Hörandl E. Novel Approaches for Species Concepts and Delimitation in Polyploids and Hybrids. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11020204. [PMID: 35050093 PMCID: PMC8781807 DOI: 10.3390/plants11020204] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/07/2022] [Accepted: 01/10/2022] [Indexed: 05/08/2023]
Abstract
Hybridization and polyploidization are important processes for plant evolution. However, classification of hybrid or polyploid species has been notoriously difficult because of the complexity of processes and different evolutionary scenarios that do not fit with classical species concepts. Polyploid complexes are formed via combinations of allopolyploidy, autopolyploidy and homoploid hybridization with persisting sexual reproduction, resulting in many discrete lineages that have been classified as species. Polyploid complexes with facultative apomixis result in complicated net-work like clusters, or rarely in agamospecies. Various case studies illustrate the problems that apply to traditional species concepts to hybrids and polyploids. Conceptual progress can be made if lineage formation is accepted as an inevitable consequence of meiotic sex, which is established already in the first eukaryotes as a DNA restoration tool. The turnaround of the viewpoint that sex forms species as lineages helps to overcome traditional thinking of species as "units". Lineage formation and self-sustainability is the prerequisite for speciation and can also be applied to hybrids and polyploids. Species delimitation is aided by the improved recognition of lineages via various novel -omics methods, by understanding meiosis functions, and by recognizing functional phenotypes by considering morphological-physiological-ecological adaptations.
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Affiliation(s)
- Elvira Hörandl
- Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, 37073 Göttingen, Germany
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Huang JCC, Hsieh YC, Lu SS, Yeh WC, Liang JY, Lin CJ, Tung GS. Flower-visiting insects of genus Melastoma (Myrtales: Melastomataceae) at the Fushan Botanical Garden, Taiwan. Biodivers Data J 2021; 9:e60315. [PMID: 33551654 PMCID: PMC7854558 DOI: 10.3897/bdj.9.e60315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 12/17/2020] [Indexed: 11/25/2022] Open
Abstract
Background We investigated the diversity and behaviour of insects that visit flowers of four native Melastoma (Family Melastomataceae) species of Taiwan and a horticultural hybrid Melastoma species at the Fushan Botanical Garden, Taiwan biweekly from May to August 2020. Visits of flower-visiting insects were classified into seven behavioural categories, based on the insects' behaviour and positions on the flower. The data are further assigned into four insect-flower interactions, namely pollination, herbivory, commensalism and neutralism. Our goal is to provide baseline data of insect-plant interactions of Melastoma, which is a common, but understudied plant genus in the country. New information A total of 1,289 visits to flowers were recorded by at least 63 insect morphospecies belonging to seven orders. The number of insect species recorded per Melastoma species ranged from 9 to 39. Visiting, sonication and passing were the three most frequently recorded types of behaviour, collectively accounting for 90.2% (n = 1,240) of the total observations. Pollination was the most dominant insect-flower interaction, accounting for 70.2% of the total observations, followed by neutralism (20.0%), herbivory (6.3%) and commensalism (3.5%). Sweat bees of the genera Lasioglossum and Maculonomia (Hymenoptera: Halictidae) are considered key pollinators to Melastoma species in Fushan Botanical Garden, based on their high number of visits and sonication behaviour. Our study provides the first list of insects that visit the flowers of all Taiwan's known Melastoma species and description of their interactions with the plants.
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Affiliation(s)
- Joe Chun Chia Huang
- Botanical Garden Division, Taiwan Forestry Research Institute, Taipei, Taiwan Botanical Garden Division, Taiwan Forestry Research Institute Taipei Taiwan
| | - Yun Chen Hsieh
- Forest Protection Division, Taiwan Forestry Research Institute, Taipei, Taiwan Forest Protection Division, Taiwan Forestry Research Institute Taipei Taiwan
| | - Sheng Shan Lu
- Forest Protection Division, Taiwan Forestry Research Institute, Taipei, Taiwan Forest Protection Division, Taiwan Forestry Research Institute Taipei Taiwan.,Fushan Research Center, Taiwan Forestry Research Institute, Yuan Shan Township, Taiwan Fushan Research Center, Taiwan Forestry Research Institute Yuan Shan Township Taiwan
| | - Wen Chi Yeh
- Forest Protection Division, Taiwan Forestry Research Institute, Taipei, Taiwan Forest Protection Division, Taiwan Forestry Research Institute Taipei Taiwan
| | - Jia Yuan Liang
- Botanical Garden Division, Taiwan Forestry Research Institute, Taipei, Taiwan Botanical Garden Division, Taiwan Forestry Research Institute Taipei Taiwan
| | - Chien Jung Lin
- Fushan Research Center, Taiwan Forestry Research Institute, Yuan Shan Township, Taiwan Fushan Research Center, Taiwan Forestry Research Institute Yuan Shan Township Taiwan
| | - Gene Sheng Tung
- Botanical Garden Division, Taiwan Forestry Research Institute, Taipei, Taiwan Botanical Garden Division, Taiwan Forestry Research Institute Taipei Taiwan
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Wu R, Zou P, Tan G, Hu Z, Wang Y, Ning Z, Wu W, Liu Y, He S, Zhou R. Molecular identification of natural hybridization between Melastoma malabathricum and Melastoama beccarianum in Sarawak, Malaysia. Ecol Evol 2019; 9:5766-5776. [PMID: 31160997 PMCID: PMC6540941 DOI: 10.1002/ece3.5160] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 03/16/2019] [Accepted: 03/18/2019] [Indexed: 12/27/2022] Open
Abstract
Hybridization is very common in flowering plants and it plays a significant role in plant evolution and adaptation. Melastoma L. (Melastomataceae) comprises about 80-90 species in tropical Asia and Oceania, among which 41 species occur in Borneo. Natural hybridization is frequently reported in Melastoma in China, but so far there have been no confirmed cases of hybridization in Southeast Asia (including Borneo), where most species occur. Here, we identified a case of natural hybridization between Melastoma malabathricum L. and Melastoma beccarianum Cogn. in Sarawak, Malaysia, by using sequence data of three nuclear genes and one chloroplast intergenic spacer. Melastoma malabathricum is the most widespread species of this genus, occurring in almost the whole range of this genus, while M. beccarianum is a local species endemic to northern Borneo. Our results showed that natural hybridization and introgression occur between M. malabathricum and M. beccarianum, and the introgression was asymmetrical, mainly from M. malabathricum to M. beccarianum. As adaptive traits can be transferred by introgression, our study suggests that natural hybridization should be a significant mechanism for the evolution and adaptation of Melastoma in Southeast Asia. However, introgression from the common species M. malabathricum to the relatively rare species M. beccarianum may cause the decline of M. beccarianum, incurring conservation concern. With a large number of species of Melastoma and almost year-around flowering in Southeast Asia, more cases of natural hybridization are expected to be found and identified in near future.
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Affiliation(s)
- Renzhi Wu
- College of Forestry and Landscape ArchitectureSouth China Agricultural UniversityGuangzhouChina
| | - Peishan Zou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Guangwen Tan
- Pubang Landscape Architecture Co., LtdGuangzhouChina
| | - Zhenyang Hu
- Pubang Landscape Architecture Co., LtdGuangzhouChina
| | - Yongqi Wang
- Pubang Landscape Architecture Co., LtdGuangzhouChina
| | - Zulin Ning
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical GardenChinese Academy of SciencesGuangzhouChina
| | - Wei Wu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Ying Liu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Shaoyun He
- College of Forestry and Landscape ArchitectureSouth China Agricultural UniversityGuangzhouChina
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
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Ng WL, Wu W, Zou P, Zhou R. Comparative transcriptomics sheds light on differential adaptation and species diversification between two Melastoma species and their F 1 hybrid. AOB PLANTS 2019; 11:plz019. [PMID: 31037213 PMCID: PMC6481908 DOI: 10.1093/aobpla/plz019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Variation in gene expression has been shown to promote adaptive divergence, and can lead to speciation. The plant genus Melastoma, thought to have diversified through adaptive radiation, provides an excellent model for the study of gene expressional changes during adaptive differentiation and following interspecific hybridization. In this study, we performed RNA-seq on M. candidum, M. sanguineum and their F1 hybrid, to investigate the role of gene expression in species diversification within the genus. Reference transcriptomes were assembled using combined data from both parental species, resulting in 50 519 and 48 120 transcripts for the leaf and flower petal, after removing redundancy. Differential expression analysis uncovered 3793 and 2116 differentially expressed (DE) transcripts, most of which are between M. candidum and M. sanguineum. Differential expression was observed for genes related to light responses, as well as genes that regulate the development of leaf trichomes, a trait that among others is thought to protect plants against sunlight, suggesting the differential adaptation of the species to sunlight intensity. The analysis of positively selected genes between the two species also revealed possible differential adaptation to other abiotic stresses such as drought and temperature. In the hybrid, almost all possible modes of expression were observed at the DE transcripts, although at most transcripts, the expression levels were similar to that of either parent instead of being intermediate. A small number of transgressively expressed transcripts that matched genes known to promote plant growth and adaptation to stresses in new environments were also found, possibly explaining the vigour observed in the hybrid. The findings in this study provided insights into the role of gene expression in the diversification of Melastoma, which we believe is an important example for more cross-taxa comparisons in the future.
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Affiliation(s)
- Wei Lun Ng
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
- China-ASEAN College of Marine Sciences, Xiamen University Malaysia, Sepang, Selangor, Malaysia
| | - Wei Wu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Peishan Zou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
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Dai JH, Lin CW, Zhou QJ, Li CM, Zhou RC, Liu Y. The specific status of Melastoma kudoi (Melastomataceae, Melastomeae). BOTANICAL STUDIES 2019; 60:5. [PMID: 30923953 PMCID: PMC6439000 DOI: 10.1186/s40529-019-0253-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/16/2019] [Indexed: 05/30/2023]
Abstract
BACKGROUND Melastoma has undergone rapid species radiation during the last one million years, and circumscription of some species in the genus has remained controversial. Melastoma kudoi, an erect species narrowly endemic to central Taiwan was previously treated as a synonym of M. intermedium, a semicreeping hybrid between the erect species M. candidum and the creeping M. dodecandrum, making its identity questionable. We addressed this question based on molecular and morphological data. RESULTS Phylogenetic analyses based on nrITS sequence data revealed that M. kudoi is most closely related to M. dodecandrum. Further analyses of six nuclear genes (cam, chi, gapC, gbss, tpi and vr) and two chloroplast markers (trnL-trnF and psbA) showed that M. kudoi is well diverged from its close relatives. Morphologically, it is also easily distinguished from related species by its erect habit, center-positioned stigma, and spreading, basally enlarged hairs on the hypanthium. CONCLUSIONS Both molecular phylogenetic and morphological data suggest that M. kudoi is well separated from M. intermedium, M. dodecandrum, and O. scaberrima, and should be treated as a distinct species. Taxonomic treatment and detailed description of M. kudoi are provided.
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Affiliation(s)
- Jin-Hong Dai
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275 China
| | - Che-Wei Lin
- Herbarium of Taiwan Forestry Research Institute, No. 53, Nan-Hai Road, Taipei, 100 Taiwan
| | - Qiu-Jie Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275 China
| | - Chun-Mei Li
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275 China
| | - Ren-Chao Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275 China
| | - Ying Liu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275 China
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Ng WL, Cai Y, Wu W, Zhou R. The complete chloroplast genome sequence of Melastoma candidum (Melastomataceae). Mitochondrial DNA B Resour 2017; 2:242-243. [PMID: 33473785 PMCID: PMC7800422 DOI: 10.1080/23802359.2017.1318680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The plant genus Melastoma is comprised of members estimated to have formed through recent species radiation. Natural hybridization among member species further complicates taxonomy within the genus. Herein, we report the complete chloroplast genome of M. candidum, assembled from partial data obtained from a parallel whole-genome Illumina paired-end sequencing effort on the species. The chloroplast genome was 156,682 bp in length, with a large single-copy (LSC) region of 86,084 bp, a small single-copy (SSC) region of 17,094 bp, separated by two inverted repeat (IR) regions of 26,752 bp each. It was predicted to contain a total of 129 genes, with an overall GC content of 37.17%. Phylogenetic analysis placed M. candidum in the same clade as species within the Melastomeae tribe of Melastomataceae.
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Affiliation(s)
- Wei Lun Ng
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yacheng Cai
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wei Wu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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Zou P, Ng WL, Wu W, Dai S, Ning Z, Wang S, Liu Y, Fan Q, Zhou R. Similar Morphologies but Different Origins: Hybrid Status of Two More Semi-creeping Taxa of Melastoma. FRONTIERS IN PLANT SCIENCE 2017; 8:673. [PMID: 28491079 PMCID: PMC5405130 DOI: 10.3389/fpls.2017.00673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 04/12/2017] [Indexed: 05/12/2023]
Abstract
Inferring the origins of hybrid taxa based on morphology alone is difficult because morphologically similar hybrids can arise from hybridization between different populations of the same parental species or be produced by hybridization of different parental species. In this study, we investigated the origins of two semi-creeping taxa in Melastoma, which are morphologically similar to a natural hybrid, M. intermedium, by sequencing a chloroplast intergenic spacer, nuclear ribosomal internal transcribed spacer and two low-copy nuclear genes (tpi and cam) in these taxa and their putative parental species. Our sequence analysis provides compelling evidence for the hybrid status of the two semi-creeping taxa: one originating from hybridization between M. dodecandrum and M. malabathricum, and the other between M. dodecandrum and M. normale. The origins of these hybrids are therefore clearly different from M. intermedium, and morphological similarity for the three hybrids is most likely due to their origins from hybridization between the same creeping species M. dodecandrum and a different erect species in each of the three cases. We also observed low rate of introgression from M. normale to M. dodecandrum, and genetic exchange between them may transfer adaptive traits to M. dodecandrum. Rare occurrence of these two hybrids may be due to small range overlaps between parental species in one case, and different flowering periods between parental species in the other.
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Affiliation(s)
- Peishan Zou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Wei Lun Ng
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Wei Wu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Seping Dai
- Guangzhou Institute of Forestry and Landscape ArchitectureGuangzhou, China
| | - Zulin Ning
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesGuangzhou, China
| | - Shuqiong Wang
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Ying Liu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Qiang Fan
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen UniversityGuangzhou, China
- *Correspondence: Renchao Zhou,
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Li M, Chen S, Zhou R, Fan Q, Li F, Liao W. Molecular Evidence for Natural Hybridization between Cotoneaster dielsianus and C. glaucophyllus. FRONTIERS IN PLANT SCIENCE 2017; 8:704. [PMID: 28536587 PMCID: PMC5422516 DOI: 10.3389/fpls.2017.00704] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/18/2017] [Indexed: 05/06/2023]
Abstract
Hybridization accompanied by polyploidization and apomixis has been demonstrated as a driving force in the evolution and speciation of many plants. A good example to study the evolutionary process of hybridization associated with polyploidy and apomixis is the genus Cotoneaster (Rosaceae), which includes approximately 150 species, most of which are polyploid apomicts. In this study, we investigated all Cotoneaster taxa distributed in a small region of Malipo, Yunnan, China. Based on the morphological characteristics, four Cotoneaster taxa were identified and sampled: C. dielsianus, C. glaucophyllus, C. franchetii, and a putative hybrid. Flow cytometry analyses showed that C. glaucophyllus was diploid, while the other three taxa were tetraploid. A total of five low-copy nuclear genes and six chloroplast regions were sequenced to validate the status of the putative hybrid. Sequence analyses showed that C. dielsianus and C. glaucophyllus are distantly related and they could be well separated using totally 50 fixed nucleotide substitutions and four fixed indels at the 11 investigated genes. All individuals of the putative hybrid harbored identical sequences: they showed chromatogram additivity for all fixed differences between C. dielsianus and C. glaucophyllus at the five nuclear genes, and were identical with C. glaucophyllus at the six chloroplast regions. Haplotype analysis revealed that C. dielsianus possessed nine haplotypes for the 11 genes, while C. glaucophyllus had ten, and there were no shared haplotypes between the two species. The putative hybrid harbored two haplotypes for each nuclear gene: one shared with C. dielsianus and the other with C. glaucophyllus. They possessed the same chloroplast haplotype with C. glaucophyllus. Our study provided convincing evidence for natural hybridization between C. dielsianus and C. glaucophyllus, and revealed that all hybrid individuals were derivatives of one initial F1 via apomixes. C. glaucophyllus served as the maternal parent at the initial hybridization event. We proposed that anthropological disturbance provided an opportunity for hybridization between C. dielsianus and C. glaucophyllus, and a tetraploid F1 successfully bred many identical progenies via apomixis. Under this situation, species integrity could be maintained for these Cotoneaster species, but attentions should be kept for this new-born hybrid.
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Affiliation(s)
- Mingwan Li
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Sufang Chen
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
- *Correspondence: Sufang Chen
| | - Renchao Zhou
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Qiang Fan
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Feifei Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental SciencesBeijing, China
- College of Life and Environmental Sciences, Minzu University of ChinaBeijing, China
- Feifei Li
| | - Wenbo Liao
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
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Chao L, Chen Y, Wang S, Liu T, Wu W, Dai S, Wang F, Fan Q, Shi S, Zhou R. One species or two? Multilocus analysis of nucleotide variation of Melastoma penicillatum and Melastoma sanguineum (Melastomataceae) in Hainan, China. BIOCHEM SYST ECOL 2014. [DOI: 10.1016/j.bse.2014.03.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Liu T, Chen Y, Chao L, Wang S, Wu W, Dai S, Wang F, Fan Q, Zhou R. Extensive hybridization and introgression between Melastoma candidum and M. sanguineum. PLoS One 2014; 9:e96680. [PMID: 24797959 PMCID: PMC4010499 DOI: 10.1371/journal.pone.0096680] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 04/10/2014] [Indexed: 11/30/2022] Open
Abstract
Natural hybridization can lead to various evolutionary outcomes in plants, including hybrid speciation and interspecific gene transfer. It can also cause taxonomic problems, especially in plant genera containing multiple species. In this study, the hybrid status of Melastoma affine, the most widespread taxon in this genus, and introgression between its putative parental species, M. candidum and M. sanguineum, were assessed on two sites, Hainan and Guangdong, using 13 SSR markers and sequences of a chloroplast intergenic spacer. Bayesian-based STRUCTURE analysis detected two most likely distinct clusters for the three taxa, and 76.0% and 73.9% of the morphologically identified individuals of M. candidum and M. sanguineum were correctly assigned, respectively. 74.5% of the M. affine individuals had a membership coefficient to either parental species between 0.1 and 0.9, suggesting admixture between M. candidum and M. sanguineum. Furthermore, NewHybrids analysis suggested that most individuals of M. affine were F2 hybrids or backcross hybrids to M. candidum, and that there was extensive introgression between M. candidum and M. sanguineum. These SSR data thus provides convincing evidence for hybrid origin of M. affine and extensive introgression between M. candidum and M. sanguineum. Chloroplast DNA results were consistent with this conclusion. Much higher hybrid frequency on the more disturbed Guangdong site suggests that human disturbance might offer suitable habitats for the survival of hybrids, a hypothesis that is in need of further testing.
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Affiliation(s)
- Ting Liu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Yunyun Chen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Lifang Chao
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Shuqiong Wang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Wei Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Seping Dai
- Guangzhou Institute of Landscape Gardening, Guangzhou, China
| | - Feng Wang
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Qiang Fan
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
- * E-mail:
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Zhang R, Liu T, Wu W, Li Y, Chao L, Huang L, Huang Y, Shi S, Zhou R. Molecular evidence for natural hybridization in the mangrove fern genus Acrostichum. BMC PLANT BIOLOGY 2013; 13:74. [PMID: 23634934 PMCID: PMC3668252 DOI: 10.1186/1471-2229-13-74] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 04/26/2013] [Indexed: 05/12/2023]
Abstract
BACKGROUND Natural hybridization is prevalent in ferns, and plays an important role in fern evolution and speciation. In the Indo West-Pacific region, the mangrove fern genus Acrostichum consists of two largely sympatric species, A. aureum and A. speciosum. Although there has been no report of interspecific hybridization before, we found some individuals morphologically intermediate between them in Guangdong and Hainan, China, for the first time, which were suspected to be hybrids. In this study, we aimed to test the hypothesis of natural hybridization between A. aureum and A. speciosum in Guangdong and Hainan using three low-copy nuclear genes. A chloroplast intergenic spacer was used to infer the hybridization direction once the hybrid status was confirmed. In addition, we examined spore shapes and germination for these taxa. RESULTS Both A. aureum and A. speciosum showed a low level of polymorphism at all three nuclear genes; however, they were well separated at these loci. At both locations, each individual of the putative hybrid showed additivity in chromatograms at all sites where the two species showed fixed differences. Haplotype analysis at all three nuclear genes indicated that each individual of the putative hybrid possessed two haplotypes, matching with those of A. aureum and A. speciosum, respectively. Sequencing of the chloroplast trnV-trnM regions showed that A. aureum differed from A. speciosum by eleven nucleotide substitutions and three indels (insertions/deletions), and all sampled individuals of the putative hybrid had the identical sequences with A. speciosum. Compared with A. aureum and A. speciosum, the putative hybrid had much reduced spore germination rate. CONCLUSIONS Sequence data of the three nuclear genes provide compelling evidence for natural hybridization between A. aureum and A. speciosum, and all the hybrid individuals are likely F1s. The hybridization is unidirectional and A. speciosum is the maternal parent of the hybrid based on the assumption of maternal inheritance of chloroplast DNA. Human disturbance on mangrove habitats may facilitate the establishment of hybrids of Acrostichum.
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Affiliation(s)
- Rongshu Zhang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ting Liu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Wei Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Yunqin Li
- Experimental Center of Fundamental Teaching, Zhuhai Campus, Sun Yat-sen University, Zhuhai, 519802, China
| | - Lifang Chao
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Lishi Huang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yelin Huang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Suhua Shi
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, 510275, China
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Liu T, Dai S, Wu W, Zhang R, Fan Q, Shi S, Zhou R. Development and characterization of microsatellite markers for Melastoma dodecandrum (Melastomataceae). APPLICATIONS IN PLANT SCIENCES 2013; 1:apps1200294. [PMID: 25202526 PMCID: PMC4105283 DOI: 10.3732/apps.1200294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 08/17/2012] [Indexed: 06/01/2023]
Abstract
PREMISE OF THE STUDY Microsatellite markers were developed for Melastoma dodecandrum to investigate the genetic diversity of this species and to detect hybridization and introgression in Melastoma. • METHODS AND RESULTS Fourteen microsatellite loci were characterized by screening primers developed using two simple sequence repeat (SSR)-enriched libraries. Based on the genotyping of two natural populations, 13 loci were polymorphic and the number of alleles per locus ranged from two to 15. The observed and expected heterozygosities for the 13 loci ranged from 0.235 to 0.941 and 0.219 to 0.922, respectively. Cross-species amplification was successful for all 14 loci in each of two congeneric species, M. candidum and M. sanguineum. • CONCLUSIONS These polymorphic SSR markers could be used as multilocus molecular makers to study the population genetics of M. dodecandrum, as well as hybridization and introgression among Melastoma species.
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Affiliation(s)
- Ting Liu
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Seping Dai
- Guangzhou Institute of Landscape Gardening, Guangzhou 510405, People’s Republic of China
| | - Wei Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People’s Republic of China
| | - Rongshu Zhang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Qiang Fan
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Suhua Shi
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
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