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A universe of dwarfs and giants: genome size and chromosome evolution in the monocot family Melanthiaceae.
New Phytol 2014; 201(4):1484-97NP

Abstract

• Since the occurrence of giant genomes in angiosperms is restricted to just a few lineages, identifying where shifts towards genome obesity have occurred is essential for understanding the evolutionary mechanisms triggering this process. • Genome sizes were assessed using flow cytometry in 79 species and new chromosome numbers were obtained. Phylogenetically based statistical methods were applied to infer ancestral character reconstructions of chromosome numbers and nuclear DNA contents. • Melanthiaceae are the most diverse family in terms of genome size, with C-values ranging more than 230-fold. Our data confirmed that giant genomes are restricted to tribe Parideae, with most extant species in the family characterized by small genomes. Ancestral genome size reconstruction revealed that the most recent common ancestor (MRCA) for the family had a relatively small genome (1C = 5.37 pg). Chromosome losses and polyploidy are recovered as the main evolutionary mechanisms generating chromosome number change. • Genome evolution in Melanthiaceae has been characterized by a trend towards genome size reduction, with just one episode of dramatic DNA accumulation in Parideae. Such extreme contrasting profiles of genome size evolution illustrate the key role of transposable elements and chromosome rearrangements in driving the evolution of plant genomes.

Authors+Show Affiliations

Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

24299166

Citation

Pellicer, Jaume, et al. "A Universe of Dwarfs and Giants: Genome Size and Chromosome Evolution in the Monocot Family Melanthiaceae." The New Phytologist, vol. 201, no. 4, 2014, pp. 1484-97.
Pellicer J, Kelly LJ, Leitch IJ, et al. A universe of dwarfs and giants: genome size and chromosome evolution in the monocot family Melanthiaceae. New Phytol. 2014;201(4):1484-97.
Pellicer, J., Kelly, L. J., Leitch, I. J., Zomlefer, W. B., & Fay, M. F. (2014). A universe of dwarfs and giants: genome size and chromosome evolution in the monocot family Melanthiaceae. The New Phytologist, 201(4), pp. 1484-97. doi:10.1111/nph.12617.
Pellicer J, et al. A Universe of Dwarfs and Giants: Genome Size and Chromosome Evolution in the Monocot Family Melanthiaceae. New Phytol. 2014;201(4):1484-97. PubMed PMID: 24299166.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A universe of dwarfs and giants: genome size and chromosome evolution in the monocot family Melanthiaceae. AU - Pellicer,Jaume, AU - Kelly,Laura J, AU - Leitch,Ilia J, AU - Zomlefer,Wendy B, AU - Fay,Michael F, Y1 - 2013/12/02/ PY - 2013/09/16/received PY - 2013/10/30/accepted PY - 2013/12/5/entrez PY - 2013/12/5/pubmed PY - 2014/9/30/medline KW - C-value KW - Liliales KW - Paris KW - Trillium KW - ancestral state KW - chromosomes KW - nuclear DNA content KW - polyploidy SP - 1484 EP - 97 JF - The New phytologist JO - New Phytol. VL - 201 IS - 4 N2 - • Since the occurrence of giant genomes in angiosperms is restricted to just a few lineages, identifying where shifts towards genome obesity have occurred is essential for understanding the evolutionary mechanisms triggering this process. • Genome sizes were assessed using flow cytometry in 79 species and new chromosome numbers were obtained. Phylogenetically based statistical methods were applied to infer ancestral character reconstructions of chromosome numbers and nuclear DNA contents. • Melanthiaceae are the most diverse family in terms of genome size, with C-values ranging more than 230-fold. Our data confirmed that giant genomes are restricted to tribe Parideae, with most extant species in the family characterized by small genomes. Ancestral genome size reconstruction revealed that the most recent common ancestor (MRCA) for the family had a relatively small genome (1C = 5.37 pg). Chromosome losses and polyploidy are recovered as the main evolutionary mechanisms generating chromosome number change. • Genome evolution in Melanthiaceae has been characterized by a trend towards genome size reduction, with just one episode of dramatic DNA accumulation in Parideae. Such extreme contrasting profiles of genome size evolution illustrate the key role of transposable elements and chromosome rearrangements in driving the evolution of plant genomes. SN - 1469-8137 UR - https://www.unboundmedicine.com/medline/citation/24299166/A_universe_of_dwarfs_and_giants:_genome_size_and_chromosome_evolution_in_the_monocot_family_Melanthiaceae_ L2 - https://doi.org/10.1111/nph.12617 DB - PRIME DP - Unbound Medicine ER -