Portal de Periódicos da CAPES

The Cassava Genome: Current Progress, Future Directions

2012; Springer Science+Business Media; Volume: 5; Issue: 1 Linguagem: Inglês

10.1007/s12042-011-9088-z

1935-9764

Simon Prochnik, Pradeep Reddy Marri, Brian Desany, Pablo D. Rabinowicz, Chinnappa D. Kodira, Mohammed Mohiuddin, Fausto Rodríguez-Zapata, Claude Fauquet, Joseph M. Tohme, Timothy T. Harkins, Daniel S. Rokhsar, Steve Rounsley,

Banana Cultivation and Research

The starchy swollen roots of cassava provide an essential food source for nearly a billion people, as well as possibilities for bioenergy, yet improvements to nutritional content and resistance to threatening diseases are currently impeded. A 454-based whole genome shotgun sequence has been assembled, which covers 69% of the predicted genome size and 96% of protein-coding gene space, with genome finishing underway. The predicted 30,666 genes and 3,485 alternate splice forms are supported by 1.4 M expressed sequence tags (ESTs). Maps based on simple sequence repeat (SSR)-, and EST-derived single nucleotide polymorphisms (SNPs) already exist. Thanks to the genome sequence, a high-density linkage map is currently being developed from a cross between two diverse cassava cultivars: one susceptible to cassava brown streak disease; the other resistant. An efficient genotyping-by-sequencing (GBS) approach is being developed to catalog SNPs both within the mapping population and among diverse African farmer-preferred varieties of cassava. These resources will accelerate marker-assisted breeding programs, allowing improvements in disease-resistance and nutrition, and will help us understand the genetic basis for disease resistance.