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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Prior, C. L. Articles by Russell, W. A. Search for Related Content PubMed Articles by Prior, C. L. Articles by Russell, W. A. Agricola Articles by Prior, C. L. Articles by Russell, W. A.

Yield Performance of Nonprolific and Prolific Maize Hybrids at Six Plant Densities¹

Grain yield response of nonprolific and prolific Corn Belt maize (Zea mays L.) single-cross hybrids to plant densities from 20,500 to 72,000 plants/ha were investigated. Four types of hybrids, each type including seven hybrids, were grown at six plant densities in eight environments (two locations in four years). The hybrid types were: type 1, elite, nonprolific; type 2, first-cycle, prolific; type 3, second-cycle or elite, prolific; and type 4, crosses between elite, nonprolific, and first-cycle, prolific parental lines. Types 1 and 3 had the highest average yields (86.5 and 89.7 q/ha, respectively) over all densities and environments and were not significantly different. Type 2 (76.3 q/ha) and type 4 (80.0 q/ha) yielded significantly less than types 1 and 3. Elite, prolific hybrids (type 3) yielded more uniformly over the range of densities (b₁ = 0.33) than did the elite, nonprolific hybrids (type 1, b₁ = 2.00). Types 2 and 4 were intermediate in response (b₁ = 1.08 and 1.73, respectively). The extent of prolificacy at the various densities probably was the most important factor in explaining responses of the types.

Key Words: Zea mays L. • Corn • Two-ear hybrids

² Former instructor, Iowa State Univ. (now plant breeder, Cornnuts Inc., Stronghurst, IL 61480) and professor, Iowa State Univ.

Received for publication October 29, 1974.

This article has been cited by other articles:

				T. Sarlangue, F. H. Andrade, P. A. Calvino, and L. C. Purcell Why Do Maize Hybrids Respond Differently to Variations in Plant Density? Agron. J., June 5, 2007; 99(4): 984 - 991. [Abstract] [Full Text] [PDF]

				N. de Leon, J. G. Coors, S. M. Kaeppler, and G. J. M. Rosa Genetic Control of Prolificacy and Related Traits in the Golden Glow Maize Population: I. Phenotypic Evaluation Crop Sci., May 27, 2005; 45(4): 1361 - 1369. [Abstract] [Full Text] [PDF]

				S. Jampatong, L.L. Darrah, G.F. Krause, and B.D. Barry Effect of One- and Two-Eared Selection on Stalk Strength and Other Characters in Maize Crop Sci., May 1, 2000; 40(3): 605 - 611. [Abstract] [Full Text]