Narrative
DS13-135 is an improved MG III soybean germplasm with indeterminate stem termination, white flowers, tawny pubescence, tan pods, brown hila, and yellow seed coats. Plants of DS13-135 are 80 cm tall and have a 1.6 lodging score (1-5 scale). Seeds weigh 13.1 g/100 seeds. DS13-135 has partial resistance (Red Brown reaction) to 11 soybean rust (Phakopsora pachyrhizi) isolates (AL04-1, AU79-1, BZ01-1, BZ01-2, CO04-2, HW98-1, PG01-2, SA01-1, TW80-2, TH02-1, and ZM01-1), a mixed reaction to AL04-3, and TAN (susceptible) reactions to PH77-1, TW72-1, IN73-1, LA04-1, and MS06-1b. This differential reaction of DS13-135 to the 17 isolates was unique, indicating its unique mode of resistance to soybean rust. DS13-135 had 14% yield loss under heavy soybean rust pressure in Paraguay, whereas L87-0482 (Rpp4) suffered a 31% yield loss, and susceptible S07-5049 suffered a 38% yield reduction. DS13-135 has the Rps1k gene for resistance to Phytophthora root and stem rot (Phytophthora sojae) races 1, 3, 4, 7, and 17, but susceptibility to race 25.