Abstract
1. The effect of selections about the course of breeding of the Varieties, CHUGOKU No. 79, N0.80, that were bred by combined. methods of bulk and pedigree was studied. 2. Selections for yellow and green mosaic were cafried by bulk method on the F2, F3, F4 of hybrids progenies to each othe regions, and recognized the effect of selections. 3. Other important charactors were selected by pedigree method after F5.4. The effects of selections to the time of earing, maturity, resistance to green and yellow mosaic and straw strength were evident, btit the effects of selections to the numbers of ears were not e'ffective. 5. As for the yielding abilities, selections were. made about the numbers of spikelets and fiowers, types of plant in early pedigree generations and the effects of selections were recognized. 6. Two superior varieties were bred with this method, these varieties are not also strong to green and yellow mosaic, but also strong to scab, strong straw, early mattirity and high yeild fit to project.
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