Chromosomal evolution in Brachiaria forage grasses with Fabiola Carvalho Santos

Fabiola Santos overlooking Brachiaria trials in Brazil

Fabiola Santos overlooking Brachiaria trials in Brazil

Fabiola Santos from University of Londrina, Brazil, is working on the Chromosomal evolution and the organization of repetitive DNA sequences in diploid and polyploid Brachiaria forage grasses in the molecular cytogenetics group in LeicesterBrachiaria is most important cultivated forage grass genus in Brazil (with billion-dollar production), and the genus includes diploid and polyploid species with similar and small chromosomes and basic numbers of x=6, x=7 and x=9. Many are apomictic and may multiply vegetatively. Fabiola is studying the genome structure and the monoploid complement to provide information about the origins of the polyploids and structure of the genome. In particular, using bioinformatic and molecular cytogenetic methods, she is exploiting rDNA, microsatellites, tandem repeats and transposable elements to characterize major genomic components, and to identify chromosomes by in situ hybridization. Questions include What is the monoploid complement – x number – for Brachiara? What is the distribution of retroelements and microsatellites across the genomes? Can we develop probes that allow identification of many individual genomes and chromosome types – with either localized probes or whole-chromosome paints?

Brachiaria bryzantha chromosomes (2n=4x=36) stained  blue with DAPI and showing some chromosomes with less labelling with a retroelement probe.

Brachiaria bryzantha chromosomes (2n=4x=36) stained blue with DAPI and showing some chromosomes with less labelling with a retroelement probe.

As well as developing karyotypes and understanding processes of genome evolution and speciation, the results will assist breeders in characterization of interspecific hybrids.

Her preliminary results are presented at the Plant Molecular Cytogenetics in Genomic and Postgenomic Era Conference in Katowice, Poland, in September 2014 in a poster by Fabíola Carvalho Santos, André Luiz Laforga Vanzela, Trude Schwarzacher and Pat Heslop-Harrison.

Fabiola is based in the Department of Biology Science, University of Londrina, Londrina, PR, Brazil. email: fabiolacs1786(a)gmail(dot)com

Advertisements

About Pat Heslop-Harrison

Professor of Molecular Cytogenetics and Cell Biology, University of Leicester Chief Editor, Annals of Botany. Research: genome evolution, breeding and biodiversity in agricultural species; the impact of agriculture; evalutation of research and advanced training.
This entry was posted in chromosomes, Collaborators, Farming, Genomics, News, People, Research and tagged , , , , , , , , , , , , , , , , , , , , . Bookmark the permalink.

One Response to Chromosomal evolution in Brachiaria forage grasses with Fabiola Carvalho Santos

  1. Pingback: Chromosomal distribution and evolution of retrotransposons in diploid and polyploid Brachiaria forage grasses | Molecular cytogenetics and genome evolution

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s