title: Compositional assessments of key maize populations: B73 hybrids of the Nested Association Mapping founder lines and diverse landrace inbred lines.
abstract: The present study provides an assessment of the compositional diversity in maize B73 hybrids derived both from the Nested Association Mapping (NAM) founder lines and from a diverse collection of landrace accessions from North and South America. The NAM founders represent a key population of publicly available lines that are used extensively in the maize community to investigate the genetic basis of complex traits. Landraces are also of interest to the maize community as they offer the potential to discover new alleles that could be incorporated into modern maize lines. The compositional analysis of B73 hybrids from the 25 NAM founders and 24 inbred lines derived from landraces included measurements of proximates (protein, fat, ash, and starch), fibers, minerals, amino acids, fatty acids, tocopherols (α-, γ-, and δ-), β-carotene, phytic acid, and raffinose. Grain was harvested from a replicated trial in New York, USA. For each data set (NAM and landrace) canonical discriminant analysis allowed separation of distinct breeding groups (tropical, temperate, flint, mixed/intermediate) within each data set. Overall, results highlighted extensive variation in all composition components assessed for both sets of hybrids. The variation observed for some components within the landraces may therefore be of value for increasing their levels in modern maize lines. The study described here provided significant information on contributions of conventional breeding to crop compositional variation, as well as valuable information on key genetic resources for the maize community in the development of new improved lines.
authors.affiliation: †Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States.
authors.forename: Tyamagondlu V
authors.initials: TV
authors.lastname: Venkatesh
authors.affiliation: †Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States.
authors.forename: George G
authors.initials: GG
authors.lastname: Harrigan
authors.affiliation: †Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States.
authors.forename: Tim
authors.initials: T
authors.lastname: Perez
authors.affiliation: §Agricultural Research Service, U.S. Department of Agriculture, Columbia, Missouri 65211, United States.|#Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, United States.
authors.forename: Sherry
authors.initials: S
authors.lastname: Flint-Garcia
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001947:Breeding; D010938:Plant Oils / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D013213:Starch / Q000032:analysis; D003313:Zea mays / Q000737:chemistry* / Q000235:genetics; D019207:beta Carotene / Q000032:analysis
chemical_list: D000596:Amino Acids; D010938:Plant Oils; D010940:Plant Proteins; D019207:beta Carotene; D013213:Starch
keywords: Nested Association Mapping (NAM) founder lines; composition analysis; landraces; maize