Effect of Visual Selection During Inbreeding Upon Combining Ability in Corn¹

Abstract

Synopsis Visual selection during successive generations of inbreeding in corn resulted in significant improvement in yield, ear appearance and plant appearance by 57%, 60% and 41%, respectively, of the 134 specific hybrid combinations. The visual selection for yield and ear appearance was more effective in introduced than in local, well‐adapted lines. For plant appaarance the visual selection was more eftective in local, well‐adapted lines.

Effect of Visual Selection During the Development of Inbred Lines of Maize

“…On the other hand, in the maize breeding literature there are considerable differences of opinion regarding the influence of VPSS on the combining ability of the lines. Therefore, some authors (Jenkins, 1935; Osler et al, 1958; Russell and Teich, 1967) reported a positive effect of VPSS on the combining ability of the lines while other authors (Brown, 1967; Sprague and Miller, 1952) did not report a significant effect. The differences between studies could be due either to different schemes of selection or to different populations used in the experiments.…”

Estimation of mass selection parameters from a heterogeneous oat population

“…Osier, Wellhausen, and Palacios (1958) found visual selec tion from S-j^ through in maize improved yield in 57 percent of the re sulting X hybrid combinations. Ear and plant appearance were judged to be improved also.…”

Estimation of mass selection parameters from a heterogeneous oat population

“…There is a sizable body of literature on visual selection within field crop species. Osier, Wellhausen, and Palacios (1958) found visual selec tion from S-j^ through in maize improved yield in 57 percent of the re sulting X hybrid combinations. Ear and plant appearance were judged to be improved also.…”