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ARS Home » Pacific West Area » Pullman, Washington » WHGQ » Research » Publications at this Location » Publication #318804

Research Project: Genetic Improvement of Wheat and Barley for Resistance to Biotic and Abiotic Stresses

Location: Wheat Health, Genetics, and Quality Research

Title: Registration of the LouAu (Louise/IWA8608077) wheat recombinant inbred line mapping population

Author
item Thompson, A.
item Smiley, R.
item Garland-campbell, Kimberly

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/18/2015
Publication Date: 7/1/2015
Citation: Thompson, A.L., Smiley, R.W., Garland Campbell, K.A. 2015. Registration of the LouAu (Louise/IWA8608077) wheat recombinant inbred line mapping population. Journal of Plant Registrations. doi: 10.3198/jpr2015.01.0002crmp.

Interpretive Summary: Landraces have been important donors of disease resistance in wheat genetics. A population derived fro a cross between and Iranian landrace, IWA8608077, and an adapted white spring wheat cultivar, Louise, was developed and assayed for resistance to pathogenic nematodes, root architecture and other traits important to wheat production. This population was assayed for molecular markers. This population has shown potential for mapping resistance to other soil-borne pathogens as well as abiotic stresses and will be useful in that endeavor.

Technical Abstract: LouAu (Louise/IWA8608077) is a wheat (Triticum aestivum L.) recombinant inbred line population developed by the United States Department of Agriculture-Agriculture Research Service, with Oregon State and Washington State Universities, from a cross between the soft white spring cultivar 'Louise' and the white facultative Iranian landrace, IWA8608077. The population was developed by single seed descent from the F2 generation to the F5 generation. The population has 150 F2:8 RILs and has been used to study the genetics of resistance to root-lesion nematodes (Pratylenchus neglectus and P. thornei), and root architecture. The 26 linkage groups identified include 30 co-dominant simple sequence repeat markers and 2008 single nucleotide polymorphic markers from the Illumina 9K wheat SNP chip. Chi-square analysis shows 21-95% of identified polymorphic markers within individual linkage groups were in segregation distortion. The population frequency distributions have a normal distribution for the measured traits P. neglectus resistance, root length, root weight, root lignin content, and plant height. The population frequency distribution has a bi-model distribution for P. thornei resistance, left skewed for lateral root number, and right skewed for growth stage. This population has shown potential for mapping resistance to other soil-borne pathogens as well as abiotic stresses and will be useful in that endeavor.