Leaf Lamina Reduced Nitrogen Concentration and Nitrate Reductase Activity as Criteria for the Identification of Productive Maize Genotypes

Leaf lamina nitrate reductase activity (NRA), and total reduced nitrogen concentration (TRNC) in maize (Zea mays L.) were examined for relationships to grain yield, yield components, grain protein, maturity, and soil nitrogen fertility (N). Genotypes were classed as high and low for NRA (HNRA and LNRA respectively), and within those classes as high and low for TRNC (HTRNC and LTRNC respectively). The classification was valid for NRA and TRNC for the various genotypes. Increased grain yield was associated primarily with the HTRNC class, but to some extent with the LNRA class. Genotypes with combined LNRA and HTRNC classification were higher yielding and more stable over environments than any other NRA-TRNC class.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agronomy

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Messmer, Mark Jonathan

• Agriculture, Agronomy

Identifier

(UMI)AAI8324608

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71585