Tree Genetics & Genomes

, Volume 3, Issue 1, pp 61–70

Conserved ortholog sets in forest trees

  • Konstantin V. Krutovsky
  • Christine G. Elsik
  • Marta Matvienko
  • Alex Kozik
  • David B. Neale
Original Paper

DOI: 10.1007/s11295-006-0052-2

Cite this article as:
Krutovsky, K.V., Elsik, C.G., Matvienko, M. et al. Tree Genetics & Genomes (2006) 3: 61. doi:10.1007/s11295-006-0052-2


Putative single-copy genes and conserved ortholog sets (COS) were identified in model plant species thale cress (Arabidopsis thaliana), rice (Oryza sativa ssp. japonica), and poplar [black cottonwood, Populus trichocarpa (Torr. & Gray ex Brayshaw)] and used to find putative COS in four conifers (the Coniferales order). Using expressed sequence tag sequences, unique transcript sets were assembled in loblolly pine (Pinus taeda L.), white spruce [Picea glauca (Moench) Voss], Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco var. menziesii], and sugi [Cryptomeria japonica (Thunberg ex Linnaeus f.) D. Don]. They were compared with COS sets identified in three model plant species using comparative sequence analysis. Almost half of the single-copy genes in herbaceous species (Arabidopsis and rice) had additional copies and homologs in poplar and conifers. The identified tentative COS sets have many applications in evolutionary genomics studies, phylogenetic analysis, and comparative mapping.


COS Cryptomeria japonica EST Ortholog Picea glauca Pinus taeda Populus trichocarpa Pseudotsuga menziesii Unique transcript 

Supplementary material

C_japonica_55-COS-genes-shared-with-ARP (fasta 38 kb)
P_glauca_359-COS-genes-shared-with-ARP (fasta 355 kb)
P_menziesii_90-COS-genes-shared-with-ARP (fasta 56 kb)
P_taeda_216-COS-genes-shared-with-ARP (fasta 175 kb)
P_trichocarpa-753-COS-genes-shared-with-ARP (fasta 338 kb)
Poplar-9605-single-copy-genes-locat-annot (fasta 3290 kb)
rice-12004-single-hits (fasta 3849 kb)
11295_2006_52_MOESM8_ESM.xls (9.8 mb)
Table 1Scontigs ESTs ID (XLS 10230 kb)
11295_2006_52_MOESM9_ESM.xls (9.4 mb)
Table 2SCOS summary (XLS 9884 kb)
11295_2006_52_MOESM10_ESM.xls (46 kb)
Table 3S26 COS annotation (XLS 46 kb)
11295_2006_52_MOESM11_ESM.xls (514 kb)
Table 4S753 COS trees (XLS 526 kb)

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Konstantin V. Krutovsky
    • 1
  • Christine G. Elsik
    • 2
  • Marta Matvienko
    • 3
  • Alex Kozik
    • 4
  • David B. Neale
    • 5
    • 6
  1. 1.Department of Forest ScienceTexas A&M UniversityCollege StationUSA
  2. 2.Department of Animal ScienceTexas A&M UniversityCollege StationUSA
  3. 3.Allometra, LLCDavisUSA
  4. 4.Genome CenterUniversity of CaliforniaDavisUSA
  5. 5.Department of Plant SciencesUniversity of CaliforniaDavisUSA
  6. 6.Institute of Forest Genetics, Pacific Southwest Research StationUS Department of Agriculture Forest ServiceDavisUSA

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