Submitted to: Crop Science Society Of America
Publication Type: Peer reviewed journal
Publication Acceptance Date: 8/31/2002
Publication Date: 3/1/2003
Citation: KILEN, T.C., YOUNG, L.D. REGISTRATION OF D96-1217 SOYBEAN GERMPLASM LINE RESISTANT TO PHYTOPHTHORA ROT AND SOYBEAN CYST NEMATODE RACES 3 AND 14. CROP SCIENCE SOCIETY OF AMERICA. 2003. v. 43. p. 740-741. Interpretive Summary: Soybean germplasm line D96-1217 was released in October, 2000 for use as a parent to develop high-yielding, multiple-pest resistant varieties. It is highly resistant to the pathogen causing the disease phytophthora rot, and is resistant to races 3 and 14 of the soybean cyst nematode. D96-1217 is of Maturity Group V, and was developed by backcrossing to transfer the gene econtrolling resistance to phytophthora rot into the variety Bedford. Therefore, it is very similar to its recurrent parent, Bedford, for all observable traits. In 1998 and 1999, when grown on clay soil at Stoneville, MS, the seed yield of D96-1217 was higher that the seed yield of Bedford.
Technical Abstract: Soybean germplasm line D96-1217 was released in October, 2000 to provide private and public soybean breeders with a potential parent to develop high yielding, multiple-pest resistant cultivars. The line D96-1217 was developed by backcrossing for four cycles to transfer the gene Rps1-c into a Bedford genetic background. Progeny from each backcrossing cycle were inoculated with race 1 or 2 of Phytophthora sojae to identify a uniformly resistant F3 line to use as a pollen parent in the next crossing cycle. After four backcrosses, F3 lines were evaluated for resistance to phytophthora rot and to races 3 and 14 of the soybean cyst nematode (SCN). The F3 line that became D96-1217 had the same level of resistance to SCN races 3 and 14 as Bedford. D96-1217 is of Group V maturity and is very similar to its recurrent parent Bedford for all other observable traits. In a replicated yield test on clay soil at Stoneville, MS in 1998, D96-1217 7yielded 3370 kg ha-1, compared to 3202 kg ha-1 for Bedford. In 1999, seed yields were 3847 kg ha-1 for D96-1217 and 3753 kg ha-1 for Bedford.