20 CROSSBREEDING CORN. 



Sturges Hybrid Flint, tlie only flint variety used in these experi- 

 ments, is a.v«large-eared yellow corn adapted to Connecticut condi- 

 tions. It has stalks considerably shorter than those of the male 

 parent and is 20 da^'s earlier. The cross was intermediate between 

 the two parents in size and time of maturit}'. The first-generation 

 cross produced much better than the female parent, but not quite 

 as well as the male parent. 



Silvermine, a white dent, and Golden Eagle, a yellow dent, are 

 the earliest varieties used in these experiments except Sturges 

 Hybrid Flint. Their first-generation crosses with Selection 119 

 produced much better than the female parents, but not quite as 

 well as the male parent. In comparison with the results from this 

 same seed as tested in California (discussed later) it should be 

 noted here that, wliile in ^Maryland Silvermine is but an average 

 producer and Golden Eagle is second to the poorest of all the 

 varieties, under California conditions both these varieties rank very 

 high in production. 



Fraley Yellow Dent is the variety that for 15 years has been 

 grown on the Derwood farm on which two of these four tests were 

 made. It is a productive variety adapted to the conditions at 

 Derwood and unrelated to Selection 119. Among the 14 fii'st- 

 generation crosses tested this is the only instance m which both 

 parents are more productive than the first-generation cross. The 

 1908 seed of the female parent produced slightly better than the 

 cross. Except that Fraley Yellow Dent differs in color from the 

 male parent and has not been improved by ear-to-row selection, 

 the conditions of this disadvantageous cross are similar to those of 

 the most advantageous cross of the series, both parents being well 

 adapted to climatic and soil conditions and highly productive. 



Selection 77 resembles Cross 120 and like it has undergone man}'' 

 years of selection. Cross 120 is adapted to Maryland conditions, 

 and Selection 77 to Scioto River Valley conditions in Ohio. With 

 Selection 119 as male parent Cross 120 makes a higldy advantageous 

 cross and Selection 77 a disadvantageous cross. 



Cross 100 was made at the same time (1902) and in the same 

 manner as Cross 120, Boone County White being the male parent 

 m each case. Hickory King, a broad-kerneled small-cobbed corn, 

 was female parent of Cross 120, and Dotson, a long-kerneled, small- 

 eared, small-cobbed corn, was female parent of Cross 100. The 

 two crosses have had similar ear-to-row selection smce 1902. Cross 

 100 has yearly been grown on poorer soil than has Cross 120. 

 Although of such similar history and treatment, when these crosses 

 are crossed with the related variety, Boone County White, one 



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