SSR markers assessed for peanut smut disease resistance.

DE BLAS, FRANCISCO J; BRESSANO, MARINA; ARIAS, RENEE S.; SCHEFFLER, BRIAN E.; SOAVE, SARA; SOAVE, JUAN H.; COSTERO B; MA PÉREZ; BUTELER, MARIO I.; J. G. SEIJO

Córdoba

Congreso; 9th International Conference of the Peanut Research Community on Advances in Arachis through Genomics and Biotechnology (AAGB-2017); 2017

International Peanut Genome Initiative

Peanut smut disease, caused by Thecaphora frezii (Carranza & Lindquist), can result in yield losses higher than 50%. Several strategies have been developed for disease management but they are still insufficient. The smut genetic resistance found in wild species and Bolivian landraces is currently the best-known alternative to manage the epiphytotic, and SSR markers are a useful tool to facilitate the rapid introgression of these attributes for cultivar development. Three crosses between Argentinian susceptible cultivars and two resistant/tolerant Bolivian landraces give rise to segregant populations. Also, three wild species were used to construct a fertile amphidiploid resistant to the peanut smut, which crossed with an elite line originated a population of 93 recombinant inbred lines (RILs). The parents of all these populations were screened with 380 SSR markers?288 novel SSRs, 12 InDels and 80 SSRs obtained from the literature?which were also analyzed by BLAST2GO to discriminate those associated to candidate genomic coding regions. An average of 100 polymorphic markers across resistant and susceptible parental materials were found, which are being further tested on the four different segregant progenies to check for resistant attribute association.