Campus Units

Agronomy

Document Type

Article

Publication Version

Published Version

Publication Date

2018

Journal or Book Title

Crop Science

Volume

58

First Page

1

Last Page

11

DOI

10.2135/cropsci2017.06.0364

Abstract

Maize (Zea mays L.) performance can vary widely between different production systems. The need for high-performing hybrids for organic systems with wide adaptation to various macroenvironments is becoming increasingly important. The goal of this study was to characterize inbred lines developed by distinct breeding programs for their combining ability and hybrid yield performance across diverse organic environments. Parent lines were selected from five different breeding programs to give a sample of publically available germplasm with potential for use in organic production systems with expired plant variety protection (Ex-PVP) and current commercial inbreds as benchmarks. A North Carolina Design II mating design was used to produce all possible cross combinations between seven lines designated as males and seven lines designated as females. A significantly positive general combining ability for the female inbred UHF134 suggests that it performs well in hybrid combination. Significant general combining ability was not observed for any male inbred line in this study. Several significantly positive specific combining abilities suggest that nonadditive genetic effects play an important role in determining yield in this germplasm. Further analysis revealed that hybrids containing either an Ex-PVP line or a commercial inbred line were on average superior to hybrids containing only inbreds developed by the cooperators of this study. This demonstrates the utility of testing inbreds from diverse sources when developing hybrids for organic production systems.

Comments

This article is published as Huffman, R. D., C. A. Abel, L. M. Pollak, W. Goldstein, R. C. Pratt, M. E. Smith, K. Montgomery, L. Grant, J. W. Edwards, and M. P. Scott. 2018. Maize Cultivar Performance under Diverse Organic Production Systems. Crop Sci. 58:1–11. doi: 10.2135/cropsci2017.06.0364.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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