Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits
Genome size (GS) diversity is of fundamental biological importance. The occurrence of giant genomes in angiosperms is restricted to just a few lineages in the analyzed genome size of plant species so far. It is still an open question whether GS diversity is shaped by neutral or natural selection. Th...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2017-07-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fpls.2017.01303/full |
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| author | Yun-peng Du Yun-peng Du Yun-peng Du Yu Bi Yu Bi Ming-fang Zhang Ming-fang Zhang Feng-ping Yang Feng-ping Yang Gui-xia Jia Xiu-hai Zhang Xiu-hai Zhang |
| author_facet | Yun-peng Du Yun-peng Du Yun-peng Du Yu Bi Yu Bi Ming-fang Zhang Ming-fang Zhang Feng-ping Yang Feng-ping Yang Gui-xia Jia Xiu-hai Zhang Xiu-hai Zhang |
| author_sort | Yun-peng Du |
| collection | DOAJ |
| description | Genome size (GS) diversity is of fundamental biological importance. The occurrence of giant genomes in angiosperms is restricted to just a few lineages in the analyzed genome size of plant species so far. It is still an open question whether GS diversity is shaped by neutral or natural selection. The genus Lilium, with giant genomes, is phylogenetically and horticulturally important and is distributed throughout the northern hemisphere. GS diversity in Lilium and the underlying evolutionary mechanisms are poorly understood. We performed a comprehensive study involving phylogenetically independent analysis on 71 species to explore the diversity and evolution of GS and its correlation with karyological and environmental traits within Lilium (including Nomocharis). The strong phylogenetic signal detected for GS in the genus provides evidence consistent with that the repetitive DNA may be the primary contributors to the GS diversity, while the significant positive relationships detected between GS and the haploid chromosome length (HCL) provide insights into patterns of genome evolution. The relationships between GS and karyotypes indicate that ancestral karyotypes of Lilium are likely to have exhibited small genomes, low diversity in centromeric index (CVCI) values and relatively high relative variation in chromosome length (CVCL) values. Significant relationships identified between GS and annual temperature and between GS and annual precipitation suggest that adaptation to habitat strongly influences GS diversity. We conclude that GS in Lilium is shaped by both neutral (genetic drift) and adaptive evolution. These findings will have important consequences for understanding the evolution of giant plant genomes, and exploring the role of repetitive DNA fraction and chromosome changes in a plant group with large genomes and conservation of chromosome number. |
| first_indexed | 2024-12-22T22:24:39Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-22T22:24:39Z |
| publishDate | 2017-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-3dfced94da424c549f185cd3bf963c4e2022-12-21T18:10:35ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2017-07-01810.3389/fpls.2017.01303280248Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental TraitsYun-peng Du0Yun-peng Du1Yun-peng Du2Yu Bi3Yu Bi4Ming-fang Zhang5Ming-fang Zhang6Feng-ping Yang7Feng-ping Yang8Gui-xia Jia9Xiu-hai Zhang10Xiu-hai Zhang11Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry SciencesBeijing, ChinaBeijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Engineering Technology Research Center of Functional FloricultureBeijing, ChinaBeijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry UniversityBeijing, ChinaBeijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry SciencesBeijing, ChinaBeijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Engineering Technology Research Center of Functional FloricultureBeijing, ChinaBeijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry SciencesBeijing, ChinaBeijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Engineering Technology Research Center of Functional FloricultureBeijing, ChinaBeijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry SciencesBeijing, ChinaBeijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Engineering Technology Research Center of Functional FloricultureBeijing, ChinaBeijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry UniversityBeijing, ChinaBeijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry SciencesBeijing, ChinaBeijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Engineering Technology Research Center of Functional FloricultureBeijing, ChinaGenome size (GS) diversity is of fundamental biological importance. The occurrence of giant genomes in angiosperms is restricted to just a few lineages in the analyzed genome size of plant species so far. It is still an open question whether GS diversity is shaped by neutral or natural selection. The genus Lilium, with giant genomes, is phylogenetically and horticulturally important and is distributed throughout the northern hemisphere. GS diversity in Lilium and the underlying evolutionary mechanisms are poorly understood. We performed a comprehensive study involving phylogenetically independent analysis on 71 species to explore the diversity and evolution of GS and its correlation with karyological and environmental traits within Lilium (including Nomocharis). The strong phylogenetic signal detected for GS in the genus provides evidence consistent with that the repetitive DNA may be the primary contributors to the GS diversity, while the significant positive relationships detected between GS and the haploid chromosome length (HCL) provide insights into patterns of genome evolution. The relationships between GS and karyotypes indicate that ancestral karyotypes of Lilium are likely to have exhibited small genomes, low diversity in centromeric index (CVCI) values and relatively high relative variation in chromosome length (CVCL) values. Significant relationships identified between GS and annual temperature and between GS and annual precipitation suggest that adaptation to habitat strongly influences GS diversity. We conclude that GS in Lilium is shaped by both neutral (genetic drift) and adaptive evolution. These findings will have important consequences for understanding the evolution of giant plant genomes, and exploring the role of repetitive DNA fraction and chromosome changes in a plant group with large genomes and conservation of chromosome number.http://journal.frontiersin.org/article/10.3389/fpls.2017.01303/fullkaryotypeenvironmental traitsDNA contentgenome size evolutionLiliumphylogeny |
| spellingShingle | Yun-peng Du Yun-peng Du Yun-peng Du Yu Bi Yu Bi Ming-fang Zhang Ming-fang Zhang Feng-ping Yang Feng-ping Yang Gui-xia Jia Xiu-hai Zhang Xiu-hai Zhang Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits Frontiers in Plant Science karyotype environmental traits DNA content genome size evolution Lilium phylogeny |
| title | Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits |
| title_full | Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits |
| title_fullStr | Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits |
| title_full_unstemmed | Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits |
| title_short | Genome Size Diversity in Lilium (Liliaceae) Is Correlated with Karyotype and Environmental Traits |
| title_sort | genome size diversity in lilium liliaceae is correlated with karyotype and environmental traits |
| topic | karyotype environmental traits DNA content genome size evolution Lilium phylogeny |
| url | http://journal.frontiersin.org/article/10.3389/fpls.2017.01303/full |
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