A Novel FHB-Resistance QTL with Uncertain Origin and its Introgression into Durum and Hard Red Spring Wheat
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1 A Novel FHB-Resistance QTL with Uncertain Origin and its Introgression into Durum and Hard Red Spring Wheat Steven Xu, Chenggen Chu, Timothy Friesen, Shiaoman Chao, Shaobin Zhong, Scott Halley, Xiwen Cai, Elias Elias USDA-ARS, North Dakota State University, Fargo North Dakota
2 Tetraploid wheat (Triticum turgidum L.) germplasm collections other than durum wheat Sub species No. of accessions NSGC Received T. turgidum ssp. carthlicum T. turgidum ssp. dicoccoides T. turgidum ssp. dicoccum T. turgidum ssp. paleocolchicum 4 3 T. turgidum ssp. polonicum T. turgidum ssp. turanicum T. turgidum ssp. turgidum Total 2,293 2,113 USDA National Small Grains Collection (
3 Reaction of T. turgidum ssp. dicoccum PI to FHB in greenhouse, 2008
4 Field Evaluation (Fargo, ND, 2010) PI Sumai 3 Grandin
5
6 Spike morphology of T. turgidum ssp. dicoccum PI PI PI PI PI PI PI PI PI PI PI PI
7 PI Cytogenetic and genetic characteristics Somatic chromosome count: 2n = 42 HMW glutenin subunits: 1Dx2+1Dy12 Chromosome pairing in F 1 hybrid with hard red spring wheat Grandin : 0.03 IV II (ring) II (rod) I (29 cells) Genomic in situ hybridization: T. timopheevii G- genome chromosome or large segments were not detected. Haplotype analysis: Not carry Fhb1
8 Two FHB resistance QTLs identified on chromosome 5AS and 5AL based on 130 doubled haploids from the cross between PI and Grandin.
9 Double haploid (DH) and backcross populations from crosses between PI and hard red spring (HRS) wheat cultivars Pedigree Generation No. of plants Grandin/PI277012//Grandin BC 1 F 1 69 Glenn/PI277012//Howard F 1 50 Reeder/PI277012//Reeder BC 1 F 1 66 Reeder/PI277012//Russ F 1 15 Russ/PI277012//Russ BC 1 F Total 311
10 Backcrosses and three-way crosses between PI and ND durum wheat cultivars Pedigree Generation No. of Plants Ben/PI //Ben BC 1 F 1 34 Ben/PI //Maier F 1 11 Divide/PI //Divide BC 1 F 1 39 Divide/PI //Ben F 1 10 Lebsock/PI //Lebsock BC 1 F 1 42 Lebsock/PI //Ben F 1 13 Mountrail/PI //Alkabo F 1 14 Mountrail/PI //Ben F 1 9 Mountrail/PI //Divide F 1 11 Mountrail/PI //Maier F 1 15 Mountrail/PI //Lebsock F 1 22 Total 220
11 BC 1 F 1 (220 durum and 311 HRS wheat plants) Single-plant selections Greenhouse, winter 2008 BC 1 F 2 3,000 plants Fargo FHB nursery, ,000 plants Prosper FHB nursery, ,600 plants Casselton F 2 nursery, 2009 Single head selections based on resistance and agronomic traits BC 1 F 3 BC 1 F 4 BC 1 F 4, BC 1 F 5 (1,000 selections) Single-plant selections Greenhouse, winter 2009 Single-plant selections Greenhouse, spring lines (3 reps), Fargo, lines (3 reps), Langdon, 2010 BC 1 F 5-6 (60 durum and 72 HRS wheat lines) (Marker genotyping, disease evaluations, 2 nd round introgression, winter 2010) Introgression of FHB resistance from PI to durum and spring wheat
12 Reeder/P12//Reeder (BC 1 F 5 ) Russ/P12//Russ (BC 1 F 5 ) Divide/P12//Divide (BC 1 F 3 )
13 Russ/PI //Russ (BC 1 F 5 ) Russ
14 Mountrail/PI //Divide (F 4 ) Divide
15 Markers analyzed in BC 1 F 5-6 lines from backcrosses of PI (PI) with durum wheat (DW) and HRS wheat (SW) cultivars. Line No P I Xgwm Xwmc Xbarc Xbarc Xwmc795 1 h h h h h 1 h h 1 h h h h h h h Xcfa2185 h h h h h h h h h h h h h h h h h h h h Xgwm Xcfd Xgwm h Xbarc40 bp Ru PI Gr Re PI Le Mo Di Be S W D W : Russ/PI//Russ (BC 1 F 6 ); Ru: Russ; P: PI (PI); Gr: Grandin; Re: Reeder; 22-23: Grandin/PI//Grandin (BC 1 F 6 ); and 28-30: Reeder/PI//Reeder (BC 1 F 6 ); Le: Lebsock; Mo: Mountrail; Di, Divide; Be: Ben; 27and 32-34: Lebsock/PI//Lebsock (BC 1 F 5 ); 35-36: Mountrail/PI//Divide (BC 1 F 5 ); 38: Ben/PI//Ben BC 1 F 5 ).
16 Current Work and Future Plans The durum line and five HRS wheat lines with both 5AS and 5AL QTLs will be further improved for agronomic performance by 2 nd round of introgression by one more backcross with cultivars. These lines will be supplied to U.S. durum and wheat breeding programs. A small amount of seed samples will be available by February, The 5AS and 5AL QTLs in HRS wheat lines will be pyramided with Fhb1 and other two QTLs mapped on 5A from T. monococum and T. timopheevii. The 5AS and 5AL QTLs in durum will be pyramided with Fhb1 and three mapped QTLs (3AS, 6BS and 7AL) derived from wild emmer (3AS, 6BS and 7AL). Saturation mapping of chromosomal interval harboring 5AL QTL.
17 Acknowledgements USDA-ARS, Fargo, ND Daryl Klindworth Zhixia Niu Chris Will Isaac Mork Mary Osenga Danielle Holmes North Dakota State Univ., Fargo, ND Shaukat Ali Joseph Mullins Sarah Underdahl Stan Stancyk Qijun Zhang Guotai Yu Qun Sun July 28, 2010, Fargo, ND
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