Relationships between some measures of maturity in maize
1940
Snelling, R.O. | Hoener, I.R.
In a study of indices of relative maturity of corn grown in 1939, coefficients of correlation were calculated among the number of days from planting to 50% silking, percentage of plants with bleached husks on September 5, and percentage of dry matter in the grain on September 14 and at harvest on October 12. A total of 218 entries were used in the study, including 68 inbred lines, 125 single crosses, and 25 double crosses. In general the correlations were highest among the single crosses and lowest among the double crosses. The most significant correlations were between silking date and the percentage dry matter on September 14, while the least significant was between silking date and dry matter at harvest time (October 12) in the double crosses. This indicates that the percentage of dry matter at harvest time may not be closely associated with the number of days to silking in double crosses that are as thoroughly dried at harvest as they were following the dry weather of 1939. The significance of these various indices of relative maturity is discussed.
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