Fine Mapping of a QTL Associated with Kernel Row Number on Chromosome 1 of Maize

The genetic factors underlying changes in ear morphology, and particularly the inheritance of kernel row number (KRN), have been broadly investigated in diverse mapping populations in maize (Zea mays L.). In this study, we mapped a region on the long arm of chromosome 1 containing a QTL for KRN. Thi...

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Bibliographic Details
Published in:PloS one 2016-03, Vol.11 (3), p.e0150276-e0150276
Main Authors: Calderón, Claudia I, Yandell, Brian S, Doebley, John F
Format: Article
Language:English
Subjects:
Analysis
Biology and Life Sciences
Chromosome 1
Chromosome mapping
Chromosome Mapping - methods
Chromosomes
Chromosomes, Plant - genetics
Confidence intervals
Corn
Domestication
Gene loci
Gene mapping
Genes
Genetic aspects
Genetic factors
Genetic Linkage - genetics
Heredity
Inbreeding
Mapping
Parents
Phenotype
Physiological aspects
Quantitative trait loci
Quantitative Trait Loci - genetics
Research and Analysis Methods
Seeds
Studies
Zea luxurians
Zea mays - genetics
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Summary:The genetic factors underlying changes in ear morphology, and particularly the inheritance of kernel row number (KRN), have been broadly investigated in diverse mapping populations in maize (Zea mays L.). In this study, we mapped a region on the long arm of chromosome 1 containing a QTL for KRN. This work was performed using a set of recombinant chromosome nearly isogenic lines (RCNILs) derived from a BC2S3 population produced using the inbred maize line W22 and teosinte (Zea mays ssp. parviglumis) as the parents. A set of 48 RCNILs was evaluated in the field during the summer of 2013 in order to perform the mapping. A QTL for KRN was found that explained approximately 51% of the phenotypic variance and had a 1.5-LOD confidence interval of 203 kb. Seven genes are described in this interval. One of these candidate genes may have been the target of domestication processes in maize and contributed to the shift from two kernel row ears in teosinte to a highly polystichous ear in maize.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0150276