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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
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| 0 | PI 638740 | Yecora Rojo Yr36 Gpc-B1 | Triticum aestivum L. subsp. aestivum | California, United States | NSGC |  | | 2005 | DEVELOPED | | | | | | Genetic material | Yecora Rojo isogenic line for Yr36 and Gpc-B1. BC6F3 homozygous line for T.dicoccoides stripe rust resistance gene Yr36 and high-grain protein content gene Gpc-B1 into HRS recurrent parent Yecora Rojo. 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. These linked genes (less than 3 cM apart) were mapped in the short arm of chromosome 6BS and molecular markers were developed to facilitate their introgression. This isogenic line has been designated as the type T.aestivum germplasm line for the Yr36 gene. The two genes were transferred by 6 backcrosses followed by selection of homozygous BC6F2 plants using molecular markers. The isogenic lines of Yecora Rojo were compared in field trials in Madera and Davis, California in 2004 under severe stripe rust infections using a split plot design with 5 replications and large plots. Isogenic lines with and without the genes showed similar agronomic characteristics including height and heading time. The line with the Yr36-Gpc-B1 genes showed reduced stripe rust infections (average 36%), higher yields (average 970 kg/ha), and increased grain protein content (average 0.8%). [See PI 638738-638742 for accessions from the same Crop Science registration.] | 1673394 | PI 638740 |
| 1 | PI 638741 | UC1113 Yr36 Gpc-B1 | Triticum turgidum L. subsp. durum (Desf.) van Slageren | California, United States | NSGC |  | | 2005 | DEVELOPED | | | | | | Genetic material | UC1113 isogenic line for Yr36 and Gpc-B1. BC6F3 homozygous line for T.dicoccoides stripe rust resistance gene Yr36 and high-grain protein content gene Gpc-B1 into HRS recurrent parent UC1113. The high-grain proteint content allele for the Gpc-B1 gene and the linked stripe rust resistance gene Yr36 were originally transferred from T.dicoccoides. These two linked genes (less than 3 cM apart) were mapped in the short arm of chromosome 6BS. This isogenic line has been designated as the type germplasm for the Yr36 gene in T.durum. The two genes were transferred by 6 backcrosses followed by selection of homozygous BC6F2 plants using molecular markers. The isogenic lines of UC1113 were compared in field trials in Madera and Davis, California in 2004 under severe stripe rust infection pressure using a split plot design with 5 replications and large plots. Isogenic lines with and without the gene showed similar agronomic characteristics including height and heading time. The line with Yr36-Gpc-B1 genes showed reduced stripe rust infections (average 34% reduction in severity), slightly higher yields (average 240 kg/ha, but not significant), and increased grain protein content (average 1.1% increase). [See PI 638738-638742 for accessions from the same Crop Science registration.] | 1673395 | PI 638741 |