Genome size in Filago L. (Asteraceae, Gnaphalieae) and related genera: phylogenetic, evolutionary and ecological implications

Andrés‐Sánchez, Santiago; Temsch, Eva M.; Rico, Enrique; Martínez‐Ortega, M. Montserrat

doi:10.1007/s00606-012-0724-3

Cited by 22 publications

(16 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…() reported a strong phylogenetic signal for genome size of 41 herbaceous plant species representing 17 families (λ = 0.74 and 0.54 for 2 C and 1 C DNA content, respectively). At genus level, strong phylogenetic signals in genome size were detected in Orobanche (λ = 1; Weiss‐Schneeweiss et al ., ), Hieracium (λ = 0.908; Chrtek et al ., ) and Filago (λ = 0.934; Andrés‐Sánchez et al ., ). This evidence together with our finding of strong phylogenetic signal in Primulina suggests that genome size is phylogenetically conserved among closely related species in general.…”

Section: Discussionmentioning

confidence: 97%

Adaptive and nonadaptive genome size evolution in Karst endemic flora of China

et al. 2014

View full text Add to dashboard Cite

SummaryGenome size variation is of fundamental biological importance and has been a longstanding puzzle in evolutionary biology. Several hypotheses for genome size evolution including neutral, maladaptive, and adaptive models have been proposed, but the relative importance of these models remains controversial.Primulina is a genus that is highly diversified in the Karst region of southern China, where genome size variation and the underlying evolutionary mechanisms are poorly understood. We reconstructed the phylogeny of Primulina using DNA sequences for 104 species and determined the genome sizes of 101 species. We examined the phylogenetic signal in genome size variation, and tested the fit to different evolutionary models and for correlations with variation in latitude and specific leaf area (SLA).The results showed that genome size, SLA and latitudinal variation all displayed strong phylogenetic signals, but were best explained by different evolutionary models. Furthermore, significant positive relationships were detected between genome size and SLA and between genome size and latitude.Our study is the first to investigate genome size evolution on such a comprehensive scale and in the Karst region flora. We conclude that genome size in Primulina is phylogenetically conserved but its variation among species is a combined outcome of both neutral and adaptive evolution.

show abstract

Section: Discussionmentioning

confidence: 97%

Adaptive and nonadaptive genome size evolution in Karst endemic flora of China

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Genome size variation might also play an important role in speciation and diversification (Pellicer et al, ). Phylogenetically based hypotheses on GS evolution have been developed for several families (Vallès et al, ; Wicke, ) and genera (Wong & Murray, ; Andres‐Sanchez et al, ) of angiosperms. Overall GS variation and evolution in most angiosperm groups still remain poorly understood (Leitch & Leitch, ).…”

Section: Introductionmentioning

confidence: 99%

Genome size variation and evolution in the grape family Vitaceae

Chu

Wen

Yang

et al. 2018

J of Sytematics Evolution

View full text Add to dashboard Cite

Genome size variation is of fundamental biological importance and has been a longstanding puzzle in evolutionary biology. In the present study, the genome size of 61 accessions corresponding to 11 genera and 50 species of Vitaceae and Leeaceae is determined using flow cytometry. Phylogenetically based statistical analyses were used to infer ancestral character reconstructions of nuclear DNA contents. The DNA 1C‐values of 38 species are reported for the first time, with the largest genome (Cyphostemma humile (N. E. Br.) Desc. ex Wild & R. B. Drumm, 1C = 3.25 pg) roughly 10.48‐fold larger than the smallest (Vitis vulpina L., 1C = 0.31 pg). The large genomes are restricted to the tribe Cayratieae, and most other extant species in the family possess relatively small genomes. Ancestral genome size reconstruction revealed that the most recent common ancestor for the family had a relatively small genome (1C = 0.85 pg). Genome evolution in Vitaceae has been characterized by a trend towards genome size reduction, with just one episode of apparent DNA accumulation in the Cayratieae lineage. Such contrasting patterns of genome size evolution probably resulted from transposable elements and chromosome rearrangements, while neopolyploidization seems to contribute to recent genome increase in some species at the tips in the family tree.

show abstract

“…The resolution of phylogenetic relationships and the elucidation of general trends in genome evolution are important steps towards a better understanding of the diversification and speciation of taxa at the diploid and polyploid levels, and these approaches have now been implemented in the analyses of many wild plant groups (Chrtek et al ., ; Andres‐Sanchez et al ., ; Vaio et al ., ). Phylogenetic trees based on plastid and biparentally inherited rDNA of diploid species of Chenopodium s.l.…”

Section: Discussionmentioning

confidence: 97%

The evolution of genome size and rDNA in diploid species ofChenopodium s.l.(Amaranthaceae)

et al. 2015

View full text Add to dashboard Cite

The evolution of genome size and ribosomal DNA (rDNA) locus organization was analysed in 23 diploid species of Chenopodium s.l., all of which share the same base chromosome number of x = 9. Phylogenetic relationships among these species were inferred from plastid and nuclear ribosomal internal transcribed spacer (nrITS) DNA sequences. The molecular phylogenetic analyses assigned all analysed species of Chenopodium s.l. to six evolutionary lineages, corresponding to the recent new generic taxonomic treatment of Chenopodium s.l. The distribution of rDNA loci for four species is presented here for the first time using fluorescence in situ hybridization (FISH) with 5S and 35S rDNA probes. Most of the 23 analysed diploid Chenopodium spp. possessed a single subterminally located 35S rDNA locus, except for three species which possessed two 35S rDNA loci. One or two 5S rDNA loci were typically localized subterminally on chromosomes, rarely interstitially. Analyses of rDNA locus numbers in a phylogenetic context resulted in the reconstruction of one locus each of 35S rDNA and 5S rDNA, both in subterminal positions, as the ancestral state. Genome sizes determined using flow cytometry were relatively small (2C value < 2.8 pg), ranging from 0.734 pg in C. schraderianum to 2.721 pg in C. californicum (nearly four-fold difference), and were often conserved within major phylogenetic lineages, suggesting an adaptive value. The reconstructed ancestral genome size was small for all evolutionary lineages, and changes have probably coincided with the divergence of major lineages.

show abstract

Genome size in Filago L. (Asteraceae, Gnaphalieae) and related genera: phylogenetic, evolutionary and ecological implications

Cited by 22 publications

References 87 publications

Adaptive and nonadaptive genome size evolution in Karst endemic flora of China

Adaptive and nonadaptive genome size evolution in Karst endemic flora of China

Genome size variation and evolution in the grape family Vitaceae

The evolution of genome size and rDNA in diploid species ofChenopodium s.l.(Amaranthaceae)

Contact Info

Product

Resources

About