W089
TBA-sugarcane genomics
Time: 5:00 PM
Energy security is a global challenge in the present century. Brazil stands out as a world-leader in the use of alternative energy sources, 47% of the energy consumed in 2009 was from renewable sources. In the same year, the total renewable energy derived from sugarcane was 18%. One way to meet the growing market demand is to increase sugarcane yield. However, recent reviews of the sugarcane breeding industry have shown that there is little genetic variation within current breeding panels, chiefly due to recurrent sucrose content selection by breeders. Massive genomic sequencing has shown that gene structure and gene order is highly conserved among plants. Differences between the maize and sorghum genomes are largely due to differential expansion of transposable elements. Analysis of the repetitive component of 500 BAC sequences determined that over 50% of the total sequence are repeats, the most frequent being LTR retrotransposons followed by DNA transposons and non-LTR retrotransposons. Insertion polymorphisms across a breeding sugarcane panel revealed for three ScIvana insertion loci distinctive contribution to the genetic background as if each defined cultivar has a seldom digital. Moreover ScDel, ScMaximus and ScAle LTR-retrotransposons were contrasted between ancestral Saccharum and modern cultivars. Results may contribute towards the identification of selective regions from S. spontaneum maintained in modern commercial cultivars.
Title: Sugarcane genomics
mavsluys@usp.br