Author
RIOS-COSTA, LORENA - University Of Illinois | |
ERICE, GORKA - University Of Illinois | |
KENDZIOR, MATT - University Of Illinois | |
LEWIS, MARK - University Of Illinois | |
MULCRONE, JESSICA - University Of Illinois | |
RESANO-GOIZUETA, INES - University Of Illinois | |
THOMPSON, BEN - University Of Illinois | |
TOMAZ, TIAGO - University Of Illinois | |
BARRIOS-PEREZ, ILSE - University Of Illinois | |
MONTES, CHRIS - University Of Illinois | |
Ainsworth, Elizabeth - Lisa | |
LEAKEY, ANDREW - University Of Illinois |
Submitted to: Maize Genetics Conference Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 1/30/2017 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Current tropospheric ozone concentrations ([O3]), an important air pollutant, are phytotoxic and detrimental to crop yield causing significant losses of ~14-26 billion in 4 of the world’s major crops. Until recent years, it was believed that agricultural and economically important C4 plants, such as maize, were not significantly affected by O3. Therefore we have a limited knowledge of the genetic and physiological basis of maize yield loss due to oxidative stress caused by O3.This project evaluated variation in the effects of elevated ozone (100ppb) on yield and yield components (ear number, individual kernel weight or kernel number) across diverse genotypes of inbred and hybrid maize during 3 growing seasons at the Free Air Concentration Enrichment (FACE) site in Champaign, IL. In 2014, 52 inbred lines representing the extremes of O3 sensitivity were tested in addition to 26 hybrids. In 2015, 10 inbred lines were retested in addition to 8 hybrid lines. Primary kernel mass (yield) was, on average, significantly lower in inbred and hybrid lines for 2014 and 2015 respectively. While some lines were sensitive to yield loss (up to -76% in inbreds and -26% in hybrids) others were highly tolerant of growth at elevated O3. Yield loss was primarily driven by decreased kernel number in inbreds, and by decreased individual kernel mass in hybrid genotypes. Inbred genotypes, B73 and Mo17 were identified as O3 tolerant and O3 sensitive, respectively. Therefore in 2016, 100 B73-Mo17 NILs (50 B-NILs containing Mo17 introgressions in a B73 background and 50 M-NILs containing B73 introgression in a Mo17 background) were evaluated for the response of yield traits to elevated O3 to perform quantitative trait locus (QTL) discovery. |