Released germplasm
Hard Red Spring Wheats
- PI 638742
- PI 638740
- PI 638739
- PI 638738
- PI 638537
- PI 638536
- PI 632252 (Outlook)
- PI 640426, PI 640427, PI 640428
PI 638742
Anza isogenic line for a 2NS/2AS translocation carrying rust resistance genes Lr37/Yr17/Sr38 (T. aestivum L.). BC6F4 (experiment 00679/133) homozygous line for rust resistance genes Lr37/Yr17/Sr38 into HRS recurrent parent Anza (CItr 15284).
Developer(s): O. Chicaiza, I. Khan, X. Zhang, J.C. Brevis, L. Jackson, X. Chen and J. Dubcovsky.
Reference: Helguera M, Khan IA, Kolmer J, Lijavetzky D, Zhong-qi L, Dubcovsky J. PCR assays for the Lr37-Yr17-Sr38 cluster of rust resistance genes and their use to develop isogenic hard red spring wheat lines. Crop Science, 2003, 43: 1839-1847. 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: VPM1 / 7*Anza
Main features: The Yr17, Lr37 and Sr38 rust resistance genes, which confer resistance in wheat against stripe rust, leaf rust and stem rust respectively, were initially introgressed in the winter bread wheat 'VPM1' (PI 519303) from Triticum ventricosum. Rust races with virulence to Yr17 and Lr37 have been identified in some countries but this gene cluster still provides resistance to a wide range of races and is useful in combination with other rust resistance genes.
The 2NS/2AS translocation replaced approximately half of the short arm of chromosome 2A. Molecular markers for this segment were used to introgress these resistance genes into Anza using six backcrosses. The isogenic lines with and without the gene were tested in field trials at Davis and Kings (2004) under severe stripe rust infections pressure. Isogenic lines were morphologically similar and showed no significant differences in flowering time and height.
The presence of the stripe rust resistance gene Yr17 significantly reduced the severity of the stripe rust infection (61% reduction in severity). The recurrent parent Anza has the slow rusting complex Lr34/Yr18 suggesting that the addition of Yr17 increases the resistance to stripe rust provided by Yr18. The improved resistance of the Yr17 isogenic lines resulted in significant increases in yield in both locations (average 663 kg/ha). The molecular and field data confirmed that the 2NS chromosome segment including the Lr37/Yr17/Sr38 resistance genes was successfully transferred to Anza.
Seed request: Check first seed availability at GRIN. Query GRIN with PI 638742. In case seed is not available from GRIN, direct your written request to the breeder, Jorge Dubcovsky.
PI 638740
Yecora Rojo isogenic line for Yr36 and Gpc-B1 (T. aestivum L.). BC6F3 (experiment 00677/121,134,135 bulked seed) homozygous line for T. dicoccoides stripe rust resistance gene Yr36 and high-grain protein content gene Gpc-B1 into HRS recurrent parent Yecora Rojo (CItr 17414).
Developer(s): O. Chicaiza, I. Khan, X. Zhang, J.C. Brevis, L. Jackson, X. Chen and J. Dubcovsky.
Reference: 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: FA15-3 ( T.dicoccoides from Israel ) / 7*Yecora Rojo
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 and molecular markers were developed to facilitate their introgression.
This isogenic line has been designated as the type T. aestivum germplasm for the Yr36 gene (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 Yecora Rojo were compared in field trials in Madera (CA) and Davis (CA) in 2004 under severe stripe rust infections 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 36 %), higher yields (average 970 kg/ha), and increased grain protein content (average 0.8 %).
Seed request: Check first seed availability at GRIN. Query GRIN with PI 638740 . In case seed is not available from GRIN, direct your written request to the breeder, Jorge Dubcovsky.
PI 638739
Kern isogenic line for Lr47 (T. aestivum L.) BC6F3 (Experiment 00682/91) homozygous line for leaf rust resistance gene Lr47. The Lr47 donor was PI 603918. The recurrent parent is the California HRS variety 'Kern'.
Developer(s): O. Chicaiza, I. Khan, X. Zhang, J.C. Brevis, L. Jackson, X. Chen and J. Dubcovsky.
Reference: Helguera M, Khan IA , Dubcovsky J. Development of PCR markers for wheat leaf rust resistance gene Lr47. Theoretical and Applied Genetics, 2000, 100: 1137-1143. 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: PI 603918/ 7*Kern
Main features: The T. speltoides 7S chromosome segment carrying Lr47 is located 2 to 10 cM from the centromere and is 20 to 30 cM long. The 7S chromosome segment was selected during the backcrossing using molecular markers. Incorporation of resistance gene Lr47 increased resistance of the donor Pavon line to nine leaf rust races when tested at the Cereal Diseases Laboratory (PRT codes: TBT, NBB, MBR, LCG, SDJ, MBG, NDB, MCG, and TDD; 3). The presence of Lr47 also increased the leaf rust resistance of Kern in field experiment 02059 at Davis California (2002).
Kern isogenic lines for Lr47 were compared in field trials at Kings (CA) in 2003 and at Kings and Davis (CA) in 2004. Isogenic lines with and without the gene showed similar agronomic characteristics including height and heading time. Depending on the environment, some of the plants carrying the Lr47 chromosome segment showed purple stems. No significant differences in yield between isogenic lines with and without the gene were detected at Kings. However, at Davis under strong stripe rust infection pressure, the lines with the leaf rust resistance gene Lr47 segment showed a 18% increase in stripe rust infections which resulted in a significant decrease in yield. These results suggest that the 7S chromosome segment has probably replaced a gene located in the 7A chromosomes of Kern that has a small positive effect on resistance to the stripe rust races present in these locations. Analysis of isogenic lines for grain protein content showed a significant increase (average 0.4%) associated with the presence of the Lr47 chromosome segment in the two locations.
Seed request: Check first seed availability at GRIN. Query GRIN with PI 638739. In case seed is not available from GRIN, direct your written request to the breeder, Jorge Dubcovsky.
PI 638738
Yecora Rojo isogenic line for Lr47 (T. aestivum L.) BC6F4 (Experiment 00682/91) homozygous line for leaf rust resistance gene Lr47. The Lr47 donor was PI 603918. The recurrent parent is the California HRS variety Yecora Rojo (CItr 17414).
Developer(s): O. Chicaiza, I. Khan, X. Zhang, J.C. Brevis, L. Jackson, X. Chen and J. Dubcovsky.
Reference: Helguera M, Khan IA , Dubcovsky J. Development of PCR markers for wheat leaf rust resistance gene Lr47. Theoretical and Applied Genetics, 2000, 100: 1137-1143. 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: PI603918 / 7*Yecora Rojo
Main features: The T. speltoides 7S chromosome segment carrying Lr47 is located 2 to 10 cM from the centromere and is 20 to 30 cM long. The chromosome segment was selected during the six backcrosses using molecular markers.
Incorporation of resistance gene Lr47 increased resistance of the donor Pavon line to nine leaf rust races tested at the Cereal Diseases Laboratory (PRT codes: TBT, NBB, MBR, LCG, SDJ, MBG, NDB, MCG, and TDD; 3) and to the isogenic lines of Yecora Rojo relative to the isogenic lines without Lr47 in field experiment 02010 at Davis CA.
Yecora Rojo isogenic lines with and without Lr47 were compared in field trials at Kings (CA) in 2003 and at Kings and Davis (CA) in 2004. Isogenic lines with and without the gene showed similar agronomic characteristics including height and heading time. Depending on the environment, some of the plants carrying the Lr47 chromosome segment showed purple stems. No significant differences in yield between isogenic lines with and without the gene were detected at Kings. However, at Davis under strong stripe rust infection pressure, the lines with the T. speltoides 7S segment carrying Lr47 showed a 10% increase in stripe rust infections which resulted in a significant decrease in yield. These results suggest that the 7S chromosome segment has probably replaced a gene located in the 7A chromosomes of Yecora Rojo that has a small positive effect on resistance to the stripe rust races present in these locations. Analysis of isogenic lines for grain protein content showed a significant increase (average 0.6% increase) associated with the presence of the Lr47 chromosome segment in the tested locations.
Seed request: Check first seed availability at GRIN. Query GRIN with PI 638738. In case seed is not available from GRIN, direct your written request to the breeder, Jorge Dubcovsky.
PI 638537
Developer(s): K. K. Kidwell
Pedigree: Tara 2002 (PI 617073)*6 / Glupro
Main features: PI 638536 is a hard red spring wheat. It contains a chromosome region on 6BS from Glupro that was projected to result in a 1 to 2 % increase in grain protein concentration. This line also carries a durable stripe rust resistance gene, Yr36, that is closely linked to the high grain protein concentration region . PI 638537 is targeted to the northeastern and southeastern spring wheat production areas of Washington State as a replacement for Tara 2002 based on it's superior agronomic performance and increased grain protein content. Grain yields and tests weights of PI 638537 were equal to or higher than those of the recurrent parent Tara 2002 in replicated field trials conducted from 2002-2004. Milling and baking characteristics of this line are similar to those of Tara 2002.
Seed request: Check first seed availability at GRIN, query with PI 638537. In case seed is not available from GRIN, direct your written request to the breeder, K. K. Kidwell.
PI 638536
Developer(s): K. K. Kidwell
Pedigree: Scarlet (PI 601814)*6 / Glupro
Main features: PI 638536 is a hard red spring wheat. It contains a chromosome region on 6BS from Glupro that was projected to result in a 1 to 2 % increase in grain protein concentration. This line also carries a durable stripe rust resistance gene, Yr36, that is closely linked to the high grain protein concentration region . PI 638536 is broadly adapted to a wide range of production conditions across eastern Washington, and is intended to replace Scarlet based on it's improved stripe rust resistance and enhanced grain protein concentration. The grain yields and test weights of PI 638536 were nearly identical to those of Scarlet in replicated field trials conducted from 2002 to 2004. Milling quality is similar to Scarlet; however, its bread loaf volume is superior to that of Scarlet.
Seed request: Check first seed availability at GRIN, query with PI 638536. In case seed is not available from GRIN, direct your written request to the breeder, K. K. Kidwell.
PI 632252 (Outlook)
Developers: Lanning S.P., Habernicht D., Wichman D.M., Kephart K.D., Stougaard R.N., Kushnak G.D., Eckhoff J.L., Carlson G.R., Grey W.E., Talbert L.E.
Reference: Registration of 'Outlook' Wheat. Crop Science, 2003, 43:2302-2303. If you have access to Crop Science you can see the article following this link.
Pedigree: PI 372129 / 2*'Amidon' (PI 527682) // MT7810 / MT7926
Main features: Outlook is a hard red spring wheat with high grain yield, good baking characteristics and resistance to the Russian wheat aphid. It carries the dominant microsatellite marker gwm106, which is located 7-cM from Dn4. Outlook is resistant to stem rust, moderately resistant to the Stagonospora blotch and susceptible to wheat stem sawfly. No data are available regarding leaf and stripe rust resistance.
Seed request: Outlook is protected by Intellectual Property Rights. Small quantities of seed for research are available from the breeder, L.E.Talbert.
PI 640426, PI 640427, PI 640428
GRIN record for PI 640426
GRIN record for PI 640427
GRIN record for PI 640428
Developers: K. K. Kidwell
Pedigree: BC4F4 line derived from Scarlet *5/4/ Scarlet // Yr5 /6* Avocet /3/ Scarlet // Yr15 /6* Avocet
Main features: Near-isogenic backcross derivative of Scarlet that contains chromosome regions on 2BS from Yr5/6*Avocet and on 1BS from Yr15/6*Avocet that carry stripe rust seedling resistance genes Yr5 and Yr15, respectively. This genotype is expected to confer resistance to known races of stripe rust in North America. Flanking markers Yr5STS-7/8 CAPS DpnII, Xwmc175 and Xbarc167 for Yr5 and Xwgp34, Xgwm934 and Xgwm33 for Yr15 were used via marker-assisted selection to monitor for the presence of these seedling resistance genes during the backcrossing process. SRS05192 is a hard red spring wheat which is tall, white-awned with mid-season maturity and white glumes. It is targeted for production in the semi-arid to intermediate rainfall (<400 mm average annual precipitation) non-irrigated wheat production regions of Washington State based on its superior stripe rust resistance.
Seed request: Seed request: Check first seed availability at GRIN, query with PI 640429, PI 640430 and PI 640431. In case seed is not available from GRIN, direct your written request to the breeder, K. K. Kidwell.