title: Expanding Maize Genetic Resources with Predomestication Alleles: Maize-Teosinte Introgression Populations.
abstract: Teosinte ( subsp. H. H. Iltis & Doebley) has greater genetic diversity than maize inbreds and landraces ( subsp. ). There are, however, limited genetic resources to efficiently evaluate and tap this diversity. To broaden resources for genetic diversity studies in maize, we developed and evaluated 928 near-isogenic introgression lines (NILs) from 10 teosinte accessions in the B73 background. Joint linkage analysis of the 10 introgression populations identified several large-effect quantitative trait loci (QTL) for days to anthesis (DTA), kernel row number (KRN), and 50-kernel weight (Wt50k). Our results confirm prior reports of kernel domestication loci and identify previously uncharacterized QTL with a range of allelic effects enabling future research into the genetic basis of these traits. Additionally, we used a targeted set of NILs to validate the effects of a KRN QTL located on chromosome 2. These introgression populations offer novel tools for QTL discovery and validation as well as a platform for initiating fine mapping.
authors.forename: Zhengbin
authors.initials: Z
authors.lastname: Liu
authors.forename: Jason
authors.initials: J
authors.lastname: Cook
authors.forename: Susan
authors.initials: S
authors.lastname: Melia-Hancock
authors.forename: Katherine
authors.initials: K
authors.lastname: Guill
authors.forename: Christopher
authors.initials: C
authors.lastname: Bottoms
authors.forename: Arturo
authors.initials: A
authors.lastname: Garcia
authors.forename: Oliver
authors.initials: O
authors.lastname: Ott
authors.forename: Rebecca
authors.initials: R
authors.lastname: Nelson
authors.forename: Jill
authors.initials: J
authors.lastname: Recker
authors.forename: Peter
authors.initials: P
authors.lastname: Balint-Kurti
authors.forename: Sara
authors.initials: S
authors.lastname: Larsson
authors.forename: Nicholas
authors.initials: N
authors.lastname: Lepak
authors.forename: Ed
authors.initials: E
authors.lastname: Buckler
authors.forename: Loren
authors.initials: L
authors.lastname: Trimble
authors.forename: William
authors.initials: W
authors.lastname: Tracy
authors.forename: Michael D
authors.initials: MD
authors.lastname: McMullen
authors.forename: Sherry A
authors.initials: SA
authors.lastname: Flint-Garcia
mesh_terms: D000483:Alleles; D002874:Chromosome Mapping; D008040:Genetic Linkage; D014644:Genetic Variation; D040641:Quantitative Trait Loci; D003313:Zea mays / Q000235:genetics*