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Citation for Study 14243

Citation title: "Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae)".

Study name: "Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae)".

This study is part of submission 14243 (Status: Published).

Citation

Jang T., Emadzade K., Parker J.S., Temsch E., Leitch A.R., Speta F., & Weiss-schneeweiss H. 2013. Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae). BMC Evolutionary Biology, .

Authors

• Jang T.
• Emadzade K. (submitter)
• Parker J.S.
• Temsch E.
• Leitch A.R.
• Speta F.
• Weiss-schneeweiss H.

Abstract

Background: Prospero (Hyacinthaceae) provides a unique system to assess the impact of genome rearrangements on plant diversification and evolution. The genus exhibits remarkable chromosomal variation but very little morphological differentiation. Basic numbers of x = 4, 5, 6 and 7, extensive polyploidy, and numerous polymorphic chromosome variants were described, but only three species are commonly recognized: P. obtusifolium, P. hanburyi, and P. autumnale s.l., the latter comprising four cytotypes. The relationship between evolutionary patterns and chromosomal variation in diploids, the basic modules of the extensive cytological diversity, is presented. Results: Evolutionary inferences were derived from fluorescence in situ hybridization (FISH) with 5S and 35S rDNA, genome size estimations, and phylogenetic analyses of ITS of 49 diploids in the three species and all cytotypes of P. autumnale s.l. All species and cytotypes possess a single 35S rDNA locus, interstitial except in P. hanburyi where it is sub-terminal, and one or two 5S rDNA loci (occasionally a third in P. obtusifolium) at fixed locations. The localization of the two rDNA types is unique for each species and cytotype. Phylogenetic data in the P. autumnale complex enable tracing of the evolution of rDNA loci, genome size, and direction of chromosomal fusions: mixed dysploidy of x = 7 to x = 6 and independently to x = 5, rather than successive descending dysploidy, is proposed. Conclusions: All diploid cytotypes are recovered as well-defined evolutionary lineages. The cytogenetic and phylogenetic approaches have provided excellent phylogenetic markers to infer the direction of chromosomal change in Prospero. Evolution in Prospero, especially in the P. autumnale complex, has been driven by differentiation of an ancestral karyotype largely unaccompanied by morphological change. These new results provide a framework for detailed analyses of various types of chromosomal rearrangements and karyotypic variation in polyploids.

Keywords

Chromosomal evolution, FISH, Genome size, Hyacinthaceae, ITS, Phylogeny, Prospero, rDNA

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S14243
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref22006,
  	 author = {Tae-Soo   Jang and Khatere  Emadzade and John S. Parker and Eva  Temsch and Andrew R Leitch and Franz  Speta and Hanna  Weiss-Schneeweiss},
  	 title = {Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae)},
  	 year = {2013},
  	 keywords = {Chromosomal evolution, FISH, Genome size, Hyacinthaceae, ITS, Phylogeny, Prospero, rDNA},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {BMC Evolutionary Biology},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Background: Prospero (Hyacinthaceae) provides a unique system to assess the impact of genome rearrangements on plant diversification and evolution. The genus exhibits remarkable chromosomal variation but very little morphological differentiation. Basic numbers of x = 4, 5, 6 and 7, extensive polyploidy, and numerous polymorphic chromosome variants were described, but only three species are commonly recognized: P. obtusifolium, P. hanburyi, and P. autumnale s.l., the latter comprising four cytotypes. The relationship between evolutionary patterns and chromosomal variation in diploids, the basic modules of the extensive cytological diversity, is presented.
  Results: Evolutionary inferences were derived from fluorescence in situ hybridization (FISH) with 5S and 35S rDNA, genome size estimations, and phylogenetic analyses of ITS of 49 diploids in the three species and all cytotypes of P. autumnale s.l. All species and cytotypes possess a single 35S rDNA locus, interstitial except in P. hanburyi where it is sub-terminal, and one or two 5S rDNA loci (occasionally a third in P. obtusifolium) at fixed locations. The localization of the two rDNA types is unique for each species and cytotype. Phylogenetic data in the P. autumnale complex enable tracing of the evolution of rDNA loci, genome size, and direction of chromosomal fusions: mixed dysploidy of x = 7 to x = 6 and independently to x = 5, rather than successive descending dysploidy, is proposed. 
  Conclusions: All diploid cytotypes are recovered as well-defined evolutionary lineages. The cytogenetic and phylogenetic approaches have provided excellent phylogenetic markers to infer the direction of chromosomal change in Prospero. Evolution in Prospero, especially in the P. autumnale complex, has been driven by differentiation of an ancestral karyotype largely unaccompanied by morphological change. These new results provide a framework for detailed analyses of various types of chromosomal rearrangements and karyotypic variation in polyploids.
  }
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 22006
  AU  - Jang,Tae-Soo  
  AU  - Emadzade,Khatere 
  AU  - Parker,John S.
  AU  - Temsch,Eva 
  AU  - Leitch,Andrew R
  AU  - Speta,Franz 
  AU  - Weiss-Schneeweiss,Hanna 
  T1  - Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae)
  PY  - 2013
  KW  - Chromosomal evolution
  KW  - FISH
  KW  - Genome size
  KW  - Hyacinthaceae
  KW  - ITS
  KW  - Phylogeny
  KW  - Prospero
  KW  - rDNA
  UR  - http://dx.doi.org/
  N2  - Background: Prospero (Hyacinthaceae) provides a unique system to assess the impact of genome rearrangements on plant diversification and evolution. The genus exhibits remarkable chromosomal variation but very little morphological differentiation. Basic numbers of x = 4, 5, 6 and 7, extensive polyploidy, and numerous polymorphic chromosome variants were described, but only three species are commonly recognized: P. obtusifolium, P. hanburyi, and P. autumnale s.l., the latter comprising four cytotypes. The relationship between evolutionary patterns and chromosomal variation in diploids, the basic modules of the extensive cytological diversity, is presented.
  Results: Evolutionary inferences were derived from fluorescence in situ hybridization (FISH) with 5S and 35S rDNA, genome size estimations, and phylogenetic analyses of ITS of 49 diploids in the three species and all cytotypes of P. autumnale s.l. All species and cytotypes possess a single 35S rDNA locus, interstitial except in P. hanburyi where it is sub-terminal, and one or two 5S rDNA loci (occasionally a third in P. obtusifolium) at fixed locations. The localization of the two rDNA types is unique for each species and cytotype. Phylogenetic data in the P. autumnale complex enable tracing of the evolution of rDNA loci, genome size, and direction of chromosomal fusions: mixed dysploidy of x = 7 to x = 6 and independently to x = 5, rather than successive descending dysploidy, is proposed. 
  Conclusions: All diploid cytotypes are recovered as well-defined evolutionary lineages. The cytogenetic and phylogenetic approaches have provided excellent phylogenetic markers to infer the direction of chromosomal change in Prospero. Evolution in Prospero, especially in the P. autumnale complex, has been driven by differentiation of an ancestral karyotype largely unaccompanied by morphological change. These new results provide a framework for detailed analyses of various types of chromosomal rearrangements and karyotypic variation in polyploids.
  
  L3  - 
  JF  - BMC Evolutionary Biology
  VL  - 
  IS  - 
  ER  -