Some differences in the functioning of selfed lines of corn under varying nutritional conditions
1926
Hoffer, G.N.
The results of these experiments show that the absorption abilities of selfed lines and of crosses between them vary widely with respect to certain of the essential mineral nutrients and to the iron and aluminum salts in the soil solution. The quantities of certain of the ash constituents absorbed by the hybrids are intermediate between the amounts absorbed by the parent lines. Less iron and aluminum are absorbed by the hybrid in loam than in clay. These differences are inversely related to the increased growth as shown by the dry weights of the plants in both soils. Associated then with hybrid vigor are absorption tendencies of the plants which result in less amounts of iron and aluminum being absorbed by the vigorous hybrid than by either of the parents of less vigorous growth. The heritable tendencies of certain selfed lines to have the leaves develop a "dying-between-the-veins" type of injury are associated with a relatively higher percentage content of iron and aluminum in the dry matter of these leaves than in the normal leaves of each generation. These relations point to heritable differences between selfed lines with respect to their absorption capacities for nutrient and non-essential elements that are present in available forms in the soil solution. These differences are most prominent in soils of low fertility. They are associated with different rates of growth of the plants and their relative resistance to root rot.
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