The immediate effect of foreign pollen upon the kernel weight of wheat (Triticum vulgare)
1931
Rosenquist, C.E.
The results on hybrid vigor in kernel weight among wheat crosses reported in this paper were obtained from 107 crosses among 28 lines and varieties of common wheat. These crosses included 7,527 selfed and 5,730 crossed kernels. When produced on the same spikes as selfed kernels, crossed kernels averaged 8% smaller and when produced on different spikes 10% smaller than selfed kernels. Selfed kernels were, as an average, about 5% larger than "incrossed" kernels, suggesting a slight error due to the method of crossing. Only 17% of the crosses studied showed some degree of increase; all others showed decreases of crossed as compared with selfed kernels, 22% of which were mathematically significant. Though the 2-year and 3-year data showed some inconsistencies, a general decrease in weight of crossed as compared with selfed kernels was evident. In general, the experiments reported in this paper showed no significant increase in kernel size which could be attributed to the phenomenon of xenia.
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