Comparative analyses in Lotus: the cytogenetic map of Lotus uliginosus Schkuhr

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  • J. Ferreira, Federal University of Pernambuco, Recife, Brasilien
  • S. Mendes, Federal University of Pernambuco, Recife, Brasilien
  • Miguel Dall´Agnol, Federal University of Rio Grande, Brasilien
  • Niels Nørgaard Sandal
  • Shusei Sato, Kazusa DNA Research Institute, Kisarazu, Japan
  • Andrea Pedrosa-Harand, University of Pernambuco, Recife, Brasilien
A comparative cytogenetic map was built for Lotusuliginosus (2n = 12), expanding previous analyses that revealed intra- and interspecific chromosomal rearrangements in the model legume L. japonicus, L. filicaulis, and L. burttii. This species is positioned in a sister clade of the previously-mapped species and is proposed as one of the progenitors of L. corniculatus, the main forage crop of the genus. The cytogenetic map allowed the location of 12 genomic regions to be compared between these species. A high macrosynteny was revealed, but it was interrupted by a translocation involving chromosomes 3 and 5, a new rearrangement for the genus. Also, a transposition on chromosome 2 was found in L. japonicus ‘Miyakojima’. Furthermore, changes in the number, size, and position of rDNA sites were observed, as well as an intraspecific size heteromorphism of the 5S rDNA site on L. uliginosus chromosome 6. The karyotype differences observed are proportional to the phylogenetic distance among these species
OriginalsprogDansk
TidsskriftCytogenetic and Genome Research
Vol/bind137
Nummer1
Sider (fra-til)42-49
Antal sider8
ISSN1424-8581
DOI
StatusUdgivet - aug. 2012

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