Shrunken kernels

Grade Minimum Test Weight (Ib/bu) Sound Barley (%) Damaged Kernel Heat Total Damaged Broken Foreign Material Shrunken Kernels... 

Fig. 4. Section of an ear illustrating the responses of Oi " to Spm elements that differ in activity of component-2. (Only the nonshrunken kernels contain The shrunken kernels are homozygous for the standard recessive allele, Oi, and are totally colorless.) Among the nonshrunken kernels, those with few or no deeply pigmented spots have one kind of Spm element. Those with many such spots have another Spm element, differing from the first in the mutation-inducing action of component-2.

The first cross was conducted with a plant having one of these states of and a fully active Spm element. The kernels on the ear section shown in Fig. 5 were produced by this cross. The ear developed on a plant that carried the selected state of and also Sfi2 (dominant allele of shrunken endosperm) in one chromosome 3, and 0i... 

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