Correlations between ear characters and yield in corn
1917
Love, H.H. | Wentz, J.B.
The characters of length, ratio of tip circumference to butt circumference, average circumference of cob, weight, average weight of kernels, number of rows of kernels, and average length and width of kernels on the seed ears do not show correlations significant enough to be of value in judging seed corn. The data indicate a slight negative correlation between percentage of grain in the seed ear and yield, meaning that possibly ears containing a low percentage of grain. The average circumference of the seed ear is the only character that shows any significant relation to yield. The judge at a corn show or a farmer in selecting his seed corn cannot pick the high-yielding seed ears when judging from outtward charcters of the ears. It is evident that the points emphasized on a score card are of no value for seed ear purposes and are entirely for show purposes. The only basis left for selecting high yielding seed corn is the ear-to-row progeny test.
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