Corn Selection

Cooper: Seed Selection (1799)

Jones: Selection of Seed Corn (1827)

Gibbes' Improved Corn (1834, 1835)

Garnett: Gibbes Prolific Corn (1835)

Baden: A Prolific Corn (1837)

Blount: Blount's Prolific Corn (1879)

Hiller: Blount's Prolific Corn (1880)

Blount: Improvement of Cereals (1882)

Troyer, A. F., and W. L. Brown: Selection for Early Flowering in Corn: Seven Late Synthetics. Crop Sci. 16(6): 767-772 (1976)
    Seven corn (Zea mays L.) synthetics adapted to southern Iowa were grown in southern Minnesota at high plant density, and the earliest 5% to flower were sibmated for five generations. The original populations and the five selected cycles were then compared in performance trials at three plant densities over 2 years. Selection effect per cycle averaged: 1.1 q/ha yield increase, 2.2 ears/100 plants increase (1-year data), 1.6 percentage points grain moisture decrease, 2.8% stalk breakage increase, 6.1 cm plant height decrease, 4.1 cm ear height decrease, 1.7 days less to flower, and 0.4 days less silk delay.
    We observed a cycle-by-density interaction wherein advanced cycles exhibited prolificacy at a low density after selection against barrenness at high densities. The decrease in silk delay and increase in ears per plant indicate that selection for early flowering during stress is effective in adapting materials to high plant densities.