choosing tall plants as progenitors in each generation tall strains can be produced. By selecting plants free from tillers, strains with few tillers can be obtained. Similarly, freedom from disease infection, as far as resistance is inherited, can be expected by selecting during the reduction period only those plants which show no infection in fields where infection is present. Even with these characters the association is far from complete. But productiveness, yield of grain, which sums up the plant's entire energies shows no such simple relation. High yielding strains may come, and have come, from plants which are poor producers. Promising strains during the first generations may be very unproductive or undesirable in some respect when finally reduced to uniformity and constancy. This emphasizes the fact that effective selection must be based upon the performance of the plants after homozygosity is attained.

LITERATURE CITED.

Cummings, M. B., and Stone, W. C., 1921. Yield and quality in Hubbard squash. Vermont A. E. S. Bull. 222. East, E. M., 1908. Inbreeding in corn.

1908.

Report Conn. A. E. S. 1907

1909. The distinction between development and heredity

in inbreeding. Amer. Nat. 43: 173-181.

East, E. M., and Hayes, H. K., 1912. Heterozygosis in evolution and in plant breeding. U. S. Dept. Agr., Bur. P. I. Bull. 243.

Eyster, W. H. 1924. A primitive sporophyte in maize. Amer. Jour. Bot.

11:7-14.

Hayes, H. K., and Brewbaker, H. E. 1924. Frequency of mutations for chlorophyll-deficient seedlings in maize. Jour. Her., 15: 497-502. Hoffer, G. N. and Holbert, J. R. 1918. Selection of disease-free seed corn. Ind. A. E. S. Bull. 224.

Hutchison, C. B., 1922. Heritable variations in maize. Jour. Agron., 14: 73-78.

Jenkins, M. T., 1923. A new method of self-pollinating corn. Jour. Her., 14: 41-44.

Jones, D. F. 1918. development.

1920.

defective seeds.

The effects of inbreeding and crossbreeding upon
Conn. A. E. S. Bull. 207.

Heritable characters of maize, IV. A lethal factor-
Jour. Her. 11: 160-167.

1921. The indeterminate growth factor in tobacco and its effect upon development. Genetics, 6: 433-444.

1924. The attainment of homozygosity in inbred strains of maize. Genetics, 9: 405-418.

Kiesselbach, T. A., 1922. Corn investigations.

Bull. 20.

King, H. D., 1918. Studies on inbreeding, I-III. Lindstrom, E. W., 1920. Chlorophyll factors of 11: 269-277.

Neb. A. E. S. Res.

1923. Heritable characters of maize XIII. Endosperm defects: sweet defective and flint defective. Jour. Her., 14: 127-135.

Mangelsdorf, P. C., 1923. The inheritance of defective seeds in maize.

Jour. Her., 14: 119-125.

Connecticut Agricultural Experiment Station

New Haven, Connecticut

The Twenty-ninth Report on

Food Products

and the Seventeenth Report on

Drug Products

For

1924

By

E. M. BAILEY

The Bulletins of this Station are mailed free to citizens of Connecticut who apply for them, and to other applicants as far as the editions permit.

OFFICERS AND STAFF

March, 1925

BOARD OF CONTROL.

His Excellency, John H. Trumbull, ex-officio, President.

Chemistry.

STAFF.

E. H. JENKINS, PH.D., Director Emeritus.

WM. L. SLATE, JR., B.SC., Director and Treasurer.
MISS L. M. BRAUTLECHT, Bookkeeper and Librarian.
MISS J. V. BERGER, Stenographer and Bookkeeper.
MISS MARY BRADLEY, Secretary.

WILLIAM VEITCH, In charge of Buildings and Grounds.

E. M. BAILEY, PH.D., Chemist in Charge.

Analytical Laboratory. R. E. ANDREW, M.A.

OWEN L. NOLAN

C. E. SHEPARD

HARRY J. FISHER, A.B.

Assistant Chemisis.