HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Vera, G. A. Articles by Crane, P. L. Search for Related Content PubMed Articles by Vera, G. A. Articles by Crane, P. L. Agricola Articles by Vera, G. A. Articles by Crane, P. L.

Effects of Selection for Lower Ear Height in Synthetic Populations of Maize¹

Two populations of maize (Zea mays L.) [Antigua 2D x (B10 x BI4)] F5 and (Eto x CBC) F5 were used a selection experiment conducted at Lafayette, Ind., to determine the effectiveness of 50% selection intensity in lowering ear height. These two populations were subjected to two cycles of selection, each followed by a generation of random intermating in Florida. The lowereared 50% of the plants in each day of silking was selected to avoid confounding selection for ear height with date of flowering.

The evaluations of the subpopulations per se derived by selection and the topcrosses of these subpopulations with five single-cross testers were made in three locations in 1968.

The results showed that selection was effective in lowering the ear height 4.5% per cycle. There was no effect on percent moisture. A slight reduction in yield and a more pronounced reduction in percent lodging were statistically nonsignificant.

Key Words: Corn • Breeding • Exotic • Zea mays L.

² Head of Maize Program of Santa Catalina Experimental Station, Instituto Nacional de Investigaciones Agropecuarias, Quito, Ecuador; and Associate Professor of Agronomy. Purdue University.

Received for publication October 23, 1969.