Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/4/2003
Publication Date: 9/1/2003
Citation: KILEN, T.C., YOUNG, L.D. REGISTRATION OF D98-1216 SOYBEAN GERMPLASM LINE RESISTANT TO PHYTOPHTHORA ROT AND SOYBEAN CYST NEMATODE RACES 3 AND 14. CROP SCIENCE. 2003. v. 43. p. 1891. Interpretive Summary: Soybean germplasm line D98-1216 was released in December, 2001 for use as a parent to develop high-yielding, multiple-pest resistant varieties. It is highly resistant to the disease phytophthora rot and races 3 and 14 of the soybean cyst nematode. D98-1216 is of Maturity Group V, and was developed by backcrossing to transfer the gene controlling resistance to phytophthora rot into the variety Bedford. Therefore, it is very similar t its recurrent parent, Bedford, for all observable traits. In 1999 and 2000, when grown on clay soil at Stoneville, MS, the seed yield of D98-1216 was significantly higher than the seed yield of Bedford.
Technical Abstract: Soybean germplasm line D98-1216 was released in December, 2001 to provide private and public soybean breeders with a potential parent to develop high-yielding, multiple-pest resistant cultivars. D98-1216 was developed by backcrossing for four cycles to transfer the gene Rps3-b 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 F 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 D98-1216 had the same level of resistance to SCN races 3 and 14 as Bedford. D98-1216 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 1999,D98-1216 yielded 4338 kg ha-1, compared to 3753 kg ha-1 for Bedford. In 2000, seed yields were 2031 kg ha-1 for D98-1216 and 1265 kg ha-1 for Bedford.