Physiological and genetic analysis for maize root characters and yield in response to low phosphorus stress

Zhigang Liu; Xiangsheng Liu; Eric J. Craft; Lixing Yuan; Lingyun Cheng; Guohua Mi; Fanjun Chen

doi:10.1270/jsbbs.17083

Research Papers

Physiological and genetic analysis for maize root characters and yield in response to low phosphorus stress

Zhigang Liu, Xiangsheng Liu, Eric J. Craft, Lixing Yuan, Lingyun Cheng, Guohua Mi, Fanjun Chen

Author information

Zhigang Liu
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University
Xiangsheng Liu
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University
Eric J. Craft
USDA-ARS, Robert Holley Center for Agriculture and Health
Lixing Yuan
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University
Lingyun Cheng
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University
Guohua Mi
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University
Fanjun Chen Corresponding author
Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University

Keywords: maize root, yield, GCA, SCA, low P stress

JOURNAL FREE ACCESS FULL-TEXT HTML
Supplementary material

2018 Volume 68 Issue 2 Pages 268-277

DOI https://doi.org/10.1270/jsbbs.17083

Browse “Advance online publication” version

Details

Abstract

Root system architecture (RSA) plays an important role in the acquisition of mineral nutrients. Nevertheless, RSA has seldom been selected as an important agricultural trait in conventional breeding programs. Little is known about the response of RSA and phosphorus use efficiency (PUE) in regards to phosphorus (P) availability between parental inbred lines and their F₁. In this study, 6 maize inbred lines and their 15 F₁ generated by a diallel mating system, were used to analyze the genetic associations between RSA and PUE. Heterosis for PUE-related traits were comparatively greater under high P condition and reduced significantly under low P condition. Relative mid-parent heterosis for root traits were expressed more under the low P condition. Low P supply had a significant effect on heterosis, GCA and SCA of RSA- and PUE- related traits. The hybrid C3 (7922 × 8703-2), which had the highest PUE, showed an average yield with a lower P uptake under the both P conditions. Results from this study suggested breeding for a relatively high grain yield with reducing aboveground P demand and grain P concentration should be sufficient to reduce P fertilizer input and improve P efficiency.

Corresponding author

Register with J-STAGE for free!