PMID- 20623155
OWN - NLM
STAT- MEDLINE
DCOM- 20120326
LR  - 20211020
IS  - 1618-0860 (Electronic)
IS  - 0918-9440 (Print)
IS  - 0918-9440 (Linking)
VI  - 124
IP  - 2
DP  - 2011 Mar
TI  - Contrasting patterns of the 5S and 45S rDNA evolutions in the Byblis liniflora 
      complex (Byblidaceae).
PG  - 231-44
LID - 10.1007/s10265-010-0366-x [doi]
AB  - To clarify the evolutionary dynamics of ribosomal RNA genes (rDNAs) in the Byblis 
      liniflora complex (Byblidaceae), we investigated the 5S and 45S rDNA genes 
      through (1) chromosomal physical mapping by fluorescence in situ hybridization 
      (FISH) and (2) phylogenetic analyses using the nontranscribed spacer of 5S rDNA 
      (5S-NTS) and the internal transcribed spacer of 45S rDNA (ITS). In addition, we 
      performed phylogenetic analyses based on rbcL and trnK intron. The complex was 
      divided into 2 clades: B. aquatica-B. filifolia and B. guehoi-B. liniflora-B. 
      rorida. Although members of the complex had conservative symmetric karyotypes, 
      they were clearly differentiated on chromosomal rDNA distribution patterns. The 
      sequence data indicated that ITS was almost homogeneous in all taxa in which two 
      or four 45S rDNA arrays were frequently found at distal regions of chromosomes in 
      the somatic karyotype. ITS homogenization could have been prompted by relatively 
      distal 45S rDNA positions. In contrast, 2-12 5S rDNA arrays were mapped onto 
      proximal/interstitial regions of chromosomes, and some paralogous 5S-NTS were 
      found in the genomes harboring 4 or more arrays. 5S-NTS sequence type-specific 
      FISH analysis showed sequence heterogeneity within and between some 5S rDNA 
      arrays. Interlocus homogenization may have been hampered by their proximal 
      location on chromosomes. Chromosomal location may have affected the contrasting 
      evolutionary dynamics of rDNAs in the B. liniflora complex.
FAU - Fukushima, Kenji
AU  - Fukushima K
AD  - Department of Basic Biology, The Graduate University for Advanced Studies, 
      Hayama, Kanagawa 240-0193, Japan.
FAU - Imamura, Kaori
AU  - Imamura K
FAU - Nagano, Katsuya
AU  - Nagano K
FAU - Hoshi, Yoshikazu
AU  - Hoshi Y
LA  - eng
PT  - Journal Article
DEP - 20100710
PL  - Japan
TA  - J Plant Res
JT  - Journal of plant research
JID - 9887853
RN  - 0 (DNA, Ribosomal)
RN  - 0 (RNA, Ribosomal)
RN  - 0 (RNA, Ribosomal, 5S)
RN  - 0 (RNA, ribosomal, 45S)
SB  - IM
MH  - Base Sequence
MH  - Chromosomes
MH  - DNA, Ribosomal/*genetics
MH  - *Evolution, Molecular
MH  - In Situ Hybridization, Fluorescence
MH  - Karyotyping
MH  - Magnoliopsida/*genetics
MH  - Molecular Sequence Data
MH  - RNA, Ribosomal/*genetics
MH  - RNA, Ribosomal, 5S/*genetics
MH  - Sequence Analysis, DNA
MH  - Species Specificity
PMC - PMC3040357
EDAT- 2010/07/14 06:00
MHDA- 2012/03/27 06:00
PMCR- 2010/07/10
CRDT- 2010/07/13 06:00
PHST- 2010/02/25 00:00 [received]
PHST- 2010/06/11 00:00 [accepted]
PHST- 2010/07/13 06:00 [entrez]
PHST- 2010/07/14 06:00 [pubmed]
PHST- 2012/03/27 06:00 [medline]
PHST- 2010/07/10 00:00 [pmc-release]
AID - 366 [pii]
AID - 10.1007/s10265-010-0366-x [doi]
PST - ppublish
SO  - J Plant Res. 2011 Mar;124(2):231-44. doi: 10.1007/s10265-010-0366-x. Epub 2010 
      Jul 10.