Biology and Population Genetics of Cereal Rust Fungi and Host Resistance
My main research interests are in the biology and population genetics of cereal rust fungi and host resistance to rusts in wheat and barley. I conduct nationwide surveys and monitoring of the race composition and dynamics of the stem rust pathogen Puccinia graminis on small grain cereal crops, accessory hosts, and the alternate host, Berberis spp. I investigate forces causing race dynamics in the stem rust populations. I collaborate with international scientists in the investigations of the race evolution in the TTKS (or Ug99) lineage and to monitor the movement of this race group through a worldwide monitoring network. I conduct research in host resistance by identifying new sources of resistance from crop species and their wild relatives, characterizing the genetics of resistance, and developing molecular markers for stem rust resistance genes. I help wheat and barley improvement programs nationwide by providing sources of stem rust resistance and by characterizing breeding germplasm for stem rust reaction.
Ug99 and emerging virulent stem rust race
in PDF format:
Chromosomal Location and Genetic Relationship
of Leaf Rust Resistance Genes Rph9 and Rph12 in BarleyOther publications:
Genetic variation for Puccinia emaculata infection in switchgrass. Gustanfson, D.M., A. Boe, and Y. Jin. 2003. Crop Sci. 43:755-759.
Molecular mapping of leaf rust resistance gene Rph5 in barley. Mammadov, J.A., J.C. Zwonitzer, R.M. Biyashev, C.A. Griffey, Y. Jin, B.J. Steffenson, and M.A. Saghai Maroof. 2003. Crop Sci. 43:388-393.
Molecular mapping of the leaf rust resistance gene Rph6 in barley and its linkage relationships with Rph5 and Rph7. Zhong, S., R.J. Effertz, Y. Jin, J.D. Franckowiak, and B.J. Steffenson. 2003. Phytopathology 93:604-609.
Sources and genetics of crown rust resistance in barley. Jin, Y. and B.J. Steffenson. 2002. Phytopathology 92:1064-1067.
Publications by CDL staff available in pdf format