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Okla. Breeding of Disease-Resistant Wheats Adapted to 



Oklahoma" To breed for (1) higher yield through more and 

 larger seeds; (2) grain with hi^er test wei^t per bushel 

 and with satisfactory kernel appearance; (3) disease re- 

 sistance; (4) cold and drou^t resistance; (5) stiff er 

 straw, non-shattering, and early maturity; and (6) varieties 

 with suitable milling and baking characteristics, 



Bot.,Chem.,Agron. 518, Coop. ARS 



Okla. Diseases of Wheat and Their Control . To (l) continue 

 leaf -rust study to determine prevalent races and shifts in 

 race populations, and watch for new races or build-up of what 

 arc now minor races; (2) thorou^ly study race separation and 

 identification, including races 21, 5U, 105, and 126, vdiich 

 are particularly difficult to distinguish; C3) devise a method 

 of collecting and storing rust samples which will maintain the 

 viability of rust spores as present collections methods cause 

 losses in viability up to 25 or 30 percent; (4) study climatology 

 in relation to winter survival and spring build-up of leaf -rust — 

 establish a comprehensive weather station in close proximity to 

 wheat where weather factors and winter survival can be corre- 

 lated over a period of several years, and by close correlation 

 of waather, initial inoculum available, and pustule counts to 

 develop a system of predicting rust infection periods; (5) 

 observe varieties and selections in various nurseries to 

 determine their reaction to Septoria leaf blotch, to search 

 for varieties or selections resistant to Septoria, and if 

 possible, to determine how resistance is inherited; and (6) 

 correlate weather records with intensity of Septoria infection 

 to learn what factors control epidemics of the disease. 

 Agron.,Bot.,Pl. Path. 772, Coop. ARS 



Tenn. Breeding for Improvement in Wheat Varieties to Include 



Resistance to Disease. Hessian Fly, and Changes in Morphological 

 Ch^lracters . To (l) use present Tennessee lines to add softness 

 and other desirable milling qualities — earliness of maturity, 

 short and stiff straw, smooth or awnless heads; resistance to 

 black chaff, scab, and take-all; (2) incorporate resistance to 

 Hessian fly; (3) select for feed and pasture types in crosses; 

 and (4) test soft vAieats for disease resistance in addition to 

 those now available. 



PI. Path. 136, Coop. USDA 



