Grain shedding in oats |
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| Authors: | G Jenkins |
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| Institution: | (1) Plant Breeding Institute, Trumpington, Cambridge, England |
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| Abstract: | Summary Results of observations on grain shedding in spring oats are presented for the seasons 1966, 1967 and 1968. These observations were made in field studies and also in laboratory tests using specially designed equipment, which is described in detail.A delay in harvesting, of approximately one month, resulted in mean grain losses in field trials of 13 per cent in 1967 and 23 per cent in 1968. Large varietal differences in grain shedding were observed in laboratory tests. There was no correlation between the grain shedding of varieties in the laboratory and their grain loss in the field in 1967, when the latter was estimated from small samples but laboratory and field results were highly correlated, positively, in 1968 when field losses were estimated from whole plots.The relative performance of varieties in laboratory tests was not substantially affected by the period of storage of the material or by the severity of the test applied. The relative grain shedding of varieties in laboratory tests was similarly unaffected by the date of harvest of the material, provided that ripe samples were taken.The proportion of grain shed in laboratory tests was negatively correlated with time from sowing to panicle emergence in 1967 and 1968. In both seasons, however, some varieties of identical maturity were differentiated in their grain shedding tendencies.The application of the laboratory technique to the screening of breeding material is discussed. |
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