Portal de Periódicos da CAPES

Inheritance of resistance to scald in barley

1950; University of California, Agriculture and Natural Resources; Volume: 20; Issue: 2 Linguagem: Inglês

10.3733/hilg.v20n02p019

0073-2230

Oscar Riddle, Fred N. Briggs,

Crop Yield and Soil Fertility

SCALD, CAUSED BY Bhynchosporium secalis (Oud.)Davis, is a leaf disease of barley that is of considerable importance in California.In 1936, when this work was undertaken, none of the varieties grown commercially in this state had a high degree of resistance, and Atlas, the most widely grown variety, was highly susceptible.With the discovery of the resistant varieties reported by Riddle and Suneson (1948), 4 it seemed desirable to study the inheritance of resistance to scald and to inaugurate a breeding program to develop a resistant strain of Atlas. V A R I E T I E S A N D SELECTIONS U S E DFour resistant varieties and selections-La Mesita, selection Calif.No. 1311, Trebi, and Turk (Qk I. 5611-2)-were used in crosses with susceptible Atlas and with each other.A brief history of each variety is given below.La Mesita, Calif.No. 1002 originated as a plant selection from California Mariout, which in turn was introduced from Egypt.It was grown commer cially for a time in Santa Barbara County, California.Calif.No. 1311 is a selection from composite cross C. I. 5461, which has been described by Harlan, Martini, and Stevens (1940).It was selected at the Aber deen Experimental Substation, Aberdeen, Idaho, from the above composite.Calif.No. 1311 was first grown at Davis in 1937 but has not been grown commercially.Trebi, C. 1.936 originated as a selection from a variety brought to the United States from the south shore of the Black Sea.It was released from the Aber deen Experimental Substation in 1918 (Harlan and Martini, 1936).This variety is not grown commercially in California.Turk, C. I. 5611-2, according to Dr. G. A.Wiebe, 5 traces to material collected in 1928 in northeastern Turkey and introduced into the United States in 1930.It is a very late, two-rowed, rough-awned, weak-strawed type, used only experimentally in this country.Because of its high resistance to scald, it was used in the backcross program with Atlas to introduce resistance into that variety.Atlas, C. 1.4118 ( Harlan and Martini, 1936 ) is the variety of malting barley most widely grown in California.It originated as a pure-line selection made from Coast barley in 1917.Coast was introduced into California by the early Spanish settlers at the time the missions were established in this state.It is very susceptible to scald.