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Research Project: Genetic Improvement of Small Grains for Biotic and Abiotic Stress Tolerance and Characterization of Pathogen Populations

Location: Plant Science Research

Title: Registration of two wheat germplasm lines fixed for Pm58

Author
item WIERSMA, ANDREW - Michigan State University
item Whetten, Rebecca
item ZHANG, GUORONG - Kansas State University
item SEHGAL, SUNISH - South Dakota State University
item KOLB, FREDERIC - University Of Illinois
item POLAND, JESSE - Kansas State University
item ESTEN, MASON - University Of Arkansas
item CARTER, ARRON - Washington State University
item Cowger, Christina
item OLSON, ERIC - Michigan State University

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/16/2017
Publication Date: 1/18/2018
Citation: Wiersma, A., Whetten, R.B., Zhang, G., Sehgal, S., Kolb, F., Poland, J., Esten, M., Carter, A., Cowger, C., Olson, E. 2018. Registration of two wheat germplasm lines fixed for Pm58. Journal of Plant Registrations. doi:10.3198/jpr2017.06.0036crg.
DOI: https://doi.org/10.3198/jpr2017.06.0036crg

Interpretive Summary: Powdery mildew, caused by Blumeria graminis (D.C.) f. sp. tritici, is a persistent threat to global wheat (Triticum aestivum L.) production. To broaden the genetic base for resistance to powdery mildew in wheat, germplasm lines called U6714-A-011 and U6714-B-056 were developed at Michigan State University. The lines carry the novel powdery mildew resistance gene Pm58. This gene was identified in Aegilops tauschii Coss. accession TA1662, introduced into T. aestivum, and mapped to wheat chromosome 2DS. The two germplasm lines described are backcrossed lines from a cross between TA1662 and the recurrent wheat parent KS05HW14, a hard white winter wheat line adapted to western Kansas. In addition to exhibiting resistant reactions to multiple Bgt isolates with broad virulence profiles, both lines have moderate yield potential and good agronomic characteristics, making them suitable as breeding germplasm. The availability of these lines will allow Pm58 to be used in wheat breeding programs, providing new resistance to powdery mildew.

Technical Abstract: Powdery mildew, caused by Blumeria graminis (D.C.) f. sp. tritici, is a persistent threat to global wheat (Triticum aestivum L.) production. To broaden the genetic base for resistance to powdery mildew in wheat, germplasm lines U6714-A-011 (Reg. No.___, PI___) and U6714-B-056 (Reg. No.___, PI___) were developed at Michigan State University that are fixed for the novel powdery mildew resistance gene Pm58. This gene was identified in Aegilops tauschii Coss. accession TA1662, introgressed to T. aestivum, and mapped to wheat chromosome 2DS. The two germplasm lines described are BC 2 F 4-derived inbred backcrossed lines from a direct cross between TA1662 and the recurrent wheat parent KS05HW14, a hard white winter wheat line adapted to western Kansas. In addition to exhibiting resistant reactions to multiple Bgt isolates with broad virulence profiles, both lines have moderate yield potential and good agronomic characteristics, making them suitable as breeding germplasm. The availability of these lines will enable the incorporation of Pm58 into wheat breeding programs, providing additional genetic variation for resistance to powdery mildew.