Released germplasm
Durums
PI 638741
UC1113 isogenic line for Yr36 and Gpc-B1 (T. turgidum subsp. durum (Desf.) Husn.). BC6F3 (experiment 00688/14, 20, bulked BC6F3 seed) homozygous line for T. dicoccoides stripe rust resistance gene Yr36 and high-grain protein content gene Gpc-B1 into HRS recurrent parent UC1113 (CD52600-0D-SBTL-SBTL-5IV-2TL-1TL-0TL).
Developer(s): O. Chicaiza, I. Khan, X. Zhang, J.C. Brevis, L. Jackson, X. Chen and J. Dubcovsky.
References: Khan IA, Procunier JD, Humphreys DG, Tranquilli G, Schlatter AR, Marcucci-Poltri S, Frohberg R, Dubcovsky J. Development of PCR based markers for a high grain protein content gene from Triticum turgidum ssp. dicoccoides transferred to bread wheat. Crop Science, 2000, 40: 518-524. If you have access to Crop Science you can see the article following this link.
Chicaiza O., Khan I.A., Zhang X., Brevis J.C., Jackson L., Chen X., Dubcovsky J. Registration of five isogenic lines for leaf and stripe resistance genes. Crop Science, 2005. In press.
Pedigree: UC1113 is a UC Davis selection from CIMMYT bulked F2 seed from the cross CD52600 [ (KIFSxRSS-BD1419 / MEXIS-CP) WAHAS] YAV79.
Main features: The High Grain protein content allele for the Gpc-B1 gene and the linked stripe rust resistance gene Yr36 were originally transferred from T. dicoccoides accession 'FA15-3' from Israel. These two linked genes (less than 3-cM apart) were mapped in the short arm of chromosome 6BS 4-7. This isogenic line has been designated as the type germplasm for the Yr36 gene in T. turgidum subsp. durum (Bob McIntosh, Wheat Gene Catalogue curator, personal communication). The two genes were transferred by six backcrosses followed by selection of homozygous BC6F2 plants using molecular markers.
The isogenic lines of UC1113 were compared in field trials in Madera (CA) and Davis (CA) in 2004 under severe stripe rust infections pressure using a split plot design with five replications and large plots. Isogenic lines with and without the gene showed similar agronomic characteristics including height and heading time. The line with the Yr36-Gpc-B1 genes showed reduced stripe rust infections (average 34 % reduction in severity), slightly higher yields (average 240 kg/ha higher, but not significant), and increased grain protein content (average 1.1 % increase).
Seed request: Check first seed availability at GRIN. Query GRIN with PI 638741. In case seed is not available from GRIN, direct your written request to the breeder, Jorge Dubcovsky.