Abstract
Nitrogen use efficiency (NUE) in maize (Zea mays L.) is an important trait to optimize yield with minimal input of nitrogen (N) fertilizer. Expired Plant Variety Protection (ex-PVP) Act-certified germplasm may be an important genetic resource for public breeding sectors. The objectives of this research were to evaluate the genetic variation of N-use traits and to characterize maize ex-PVP inbreds that are adapted to the U.S. Corn Belt for NUE performance. Eighty-nine ex-PVP inbreds (36 stiff stalk synthetic (SSS), and 53 non-stiff stalk synthetic (NSSS)) were genotyped using 26,769 single-nucleotide polymorphisms, then 263 single-cross maize hybrids derived from these inbreds were grown in eight environments from 2011 to 2015 at two N fertilizer rates (0 and 252 kg N ha–1) and three replications. Genetic utilization of inherent soil nitrogen and the yield response to N fertilizer were stable across environments and were highly correlated with yield under low and high N conditions, respectively. Cluster analysis identified inbreds with desirable NUE performance. However, only one inbred (PHK56) was ranked in the top 10% for yield under both N-stress and high N conditions. Broad-sense heritability across 12 different N-use traits varied from 0.11 to 0.77, but was not associated with breeding value accuracy. Nitrogen-stress tolerance was negatively correlated with the yield increase from N fertilizer.
| Original language | English (US) |
|---|---|
| Article number | 3 |
| Journal | Agriculture (Switzerland) |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2018 |
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Keywords
- Expired plant variety protection (ex-PVP)
- Maize
- Nitrogen stress
- Nitrogen use efficiency (NUE)
- U.S. corn belt germplasm
ASJC Scopus subject areas
- Food Science
- Agronomy and Crop Science
- Plant Science
Cite this
Nitrogen use efficiency and the genetic variation of maize expired plant variety protection germplasm. / Mastrodomenico, Adriano T.; Hendrix, C. Cole; Below, Frederick E.
In: Agriculture (Switzerland), Vol. 8, No. 1, 3, 01.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nitrogen use efficiency and the genetic variation of maize expired plant variety protection germplasm
AU - Mastrodomenico, Adriano T.
AU - Hendrix, C. Cole
AU - Below, Frederick E
PY - 2018/1
Y1 - 2018/1
N2 - Nitrogen use efficiency (NUE) in maize (Zea mays L.) is an important trait to optimize yield with minimal input of nitrogen (N) fertilizer. Expired Plant Variety Protection (ex-PVP) Act-certified germplasm may be an important genetic resource for public breeding sectors. The objectives of this research were to evaluate the genetic variation of N-use traits and to characterize maize ex-PVP inbreds that are adapted to the U.S. Corn Belt for NUE performance. Eighty-nine ex-PVP inbreds (36 stiff stalk synthetic (SSS), and 53 non-stiff stalk synthetic (NSSS)) were genotyped using 26,769 single-nucleotide polymorphisms, then 263 single-cross maize hybrids derived from these inbreds were grown in eight environments from 2011 to 2015 at two N fertilizer rates (0 and 252 kg N ha–1) and three replications. Genetic utilization of inherent soil nitrogen and the yield response to N fertilizer were stable across environments and were highly correlated with yield under low and high N conditions, respectively. Cluster analysis identified inbreds with desirable NUE performance. However, only one inbred (PHK56) was ranked in the top 10% for yield under both N-stress and high N conditions. Broad-sense heritability across 12 different N-use traits varied from 0.11 to 0.77, but was not associated with breeding value accuracy. Nitrogen-stress tolerance was negatively correlated with the yield increase from N fertilizer.
AB - Nitrogen use efficiency (NUE) in maize (Zea mays L.) is an important trait to optimize yield with minimal input of nitrogen (N) fertilizer. Expired Plant Variety Protection (ex-PVP) Act-certified germplasm may be an important genetic resource for public breeding sectors. The objectives of this research were to evaluate the genetic variation of N-use traits and to characterize maize ex-PVP inbreds that are adapted to the U.S. Corn Belt for NUE performance. Eighty-nine ex-PVP inbreds (36 stiff stalk synthetic (SSS), and 53 non-stiff stalk synthetic (NSSS)) were genotyped using 26,769 single-nucleotide polymorphisms, then 263 single-cross maize hybrids derived from these inbreds were grown in eight environments from 2011 to 2015 at two N fertilizer rates (0 and 252 kg N ha–1) and three replications. Genetic utilization of inherent soil nitrogen and the yield response to N fertilizer were stable across environments and were highly correlated with yield under low and high N conditions, respectively. Cluster analysis identified inbreds with desirable NUE performance. However, only one inbred (PHK56) was ranked in the top 10% for yield under both N-stress and high N conditions. Broad-sense heritability across 12 different N-use traits varied from 0.11 to 0.77, but was not associated with breeding value accuracy. Nitrogen-stress tolerance was negatively correlated with the yield increase from N fertilizer.
KW - Expired plant variety protection (ex-PVP)
KW - Maize
KW - Nitrogen stress
KW - Nitrogen use efficiency (NUE)
KW - U.S. corn belt germplasm
UR - http://www.scopus.com/inward/record.url?scp=85040232879&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85040232879&partnerID=8YFLogxK
U2 - 10.3390/agriculture8010003
DO - 10.3390/agriculture8010003
M3 - Article
AN - SCOPUS:85040232879
VL - 8
JO - Agriculture (Switzerland)
JF - Agriculture (Switzerland)
SN - 2077-0472
IS - 1
M1 - 3
ER -