TY - JOUR
T1 - Quantitative Genetic Dissection of Shoot Architecture Traits in Maize
T2 - Towards a Functional Genomics Approach
AU - Lauter, Nick
AU - Moscou, Matthew J.
AU - Habiger, Josh
AU - Moose, Stephen P.
N1 - We thank Mike Lee and colleagues for their foresight and effort in developing the IBMRILs, Ed Coe and colleagues in the Maize Mapping Project for providing genotype data, Marty Sachs and the Maize Genetics Stock Center for providing seeds, and Jerry Chandler, David Hessel, Torbert Rocheford, Martha Schneerman, Magen Starr, and Elizabeth Wrage for assistance with nursery and genetic marker work, Tanzy Love, Andrew Crosset, and Mike Muszynski for helpful discussions, and two anonymous reviewers for insightful comments. Scripting efforts by MM and JH were supported by the Iowa State University Bioinformatics and Computational Biology 2006 Summer Institute (NSF EEC‐0234102). This work was supported by USDA‐ARS CRIS #3625‐21000‐049‐00D, a grant to SM from the Illinois Agricultural Experiment Station (ILLU‐15‐0359), and a grant to NL from USDA‐CSREES (ILLU‐802‐531).
We thank Mike Lee and colleagues for their foresight and effort in developing the IBMRILs, Ed Coe and colleagues in the Maize Mapping Project for providing genotype data, Marty Sachs and the Maize Genetics Stock Center for providing seeds, and Jerry Chandler, David Hessel, Torbert Rocheford, Martha Schneerman, Magen Starr, and Elizabeth Wrage for assistance with nursery and genetic marker work, Tanzy Love, Andrew Crosset, and Mike Muszynski for helpful discussions, and two anonymous reviewers for insightful comments. Scripting efforts by MM and JH were supported by the Iowa State University Bioinformatics and Computational Biology 2006 Summer Institute (NSF EEC-0234102). This work was supported by USDA-ARS CRIS #3625-21000-049-00D, a grant to SM from the Illinois Agricultural Experiment Station (ILLU-15-0359), and a grant to NL from USDA-CSREES (ILLU-802-531).
PY - 2008/11
Y1 - 2008/11
N2 - Quantitative trait loci (QTL) affecting the total number of leaves made before flowering and the number of leaves below the uppermost ear (NLBE) were mapped and characterized using the intermated B73 × Mo17 recombinant inbred lines (IBMRILs) of maize (Zea mays L.). B73 and Mo17 typically make 20 and 17 leaves, 14 and 11 of which are below the ear. Total number of leaves and the number of leaves below the uppermost ear are ∼80% heritable in the IBMRILs, which show strongly transgressive phenotypic ranges of 15 to 24 and 10 to 18 leaves for these traits. B73 alleles at loci in chromosome bins 1.06, 3.06, 4.08, 8.04, 8.05, 9.07, and 10.04 increase leaf numbers, with all but the 3.06 QTL affecting both of these highly correlated traits (r = 0.86, p < 0.0001). Conservative QTL confidence intervals were computed and projected onto the draft maize genome sequence, revealing very narrow localizations (∼1 Mb) for four of the seven loci. More than 40% of the heritable variation for both traits is explained by an additive model, squarely accounting for the dramatic parental differences, but leaving the basis of the strong transgression unexplained. In addition, error rate control and confidence interval methods tailored for composite interval mapping are introduced, and their potential for improving QTL reporting is discussed.
AB - Quantitative trait loci (QTL) affecting the total number of leaves made before flowering and the number of leaves below the uppermost ear (NLBE) were mapped and characterized using the intermated B73 × Mo17 recombinant inbred lines (IBMRILs) of maize (Zea mays L.). B73 and Mo17 typically make 20 and 17 leaves, 14 and 11 of which are below the ear. Total number of leaves and the number of leaves below the uppermost ear are ∼80% heritable in the IBMRILs, which show strongly transgressive phenotypic ranges of 15 to 24 and 10 to 18 leaves for these traits. B73 alleles at loci in chromosome bins 1.06, 3.06, 4.08, 8.04, 8.05, 9.07, and 10.04 increase leaf numbers, with all but the 3.06 QTL affecting both of these highly correlated traits (r = 0.86, p < 0.0001). Conservative QTL confidence intervals were computed and projected onto the draft maize genome sequence, revealing very narrow localizations (∼1 Mb) for four of the seven loci. More than 40% of the heritable variation for both traits is explained by an additive model, squarely accounting for the dramatic parental differences, but leaving the basis of the strong transgression unexplained. In addition, error rate control and confidence interval methods tailored for composite interval mapping are introduced, and their potential for improving QTL reporting is discussed.
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U2 - 10.3835/plantgenome2008.06.0385
DO - 10.3835/plantgenome2008.06.0385
M3 - Article
AN - SCOPUS:77949346859
SN - 1940-3372
VL - 1
JO - Plant Genome
JF - Plant Genome
IS - 2
M1 - TPG2PLANTGENOME2008060385
ER -