Open AccessQuantitative Trait Locus Mapping Reveals Regions of the Maize Genome Controlling Root System Architecture
Author(s) -
Paul R. Zurek,
Christopher N. Topp,
Philip N. Benfey
Publication year - 2015
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.114.251751
Subject(s) - quantitative trait locus , biology , genetic architecture , association mapping , zea mays , trait , locus (genetics) , population , computational biology , genetics , root (linguistics) , gene mapping , adaptation (eye) , evolutionary biology , genotype , gene , computer science , agronomy , single nucleotide polymorphism , linguistics , programming language , philosophy , demography , neuroscience , sociology , chromosome
The quest to determine the genetic basis of root system architecture (RSA) has been greatly facilitated by recent developments in root phenotyping techniques. Methods that are accurate, high throughput, and control for environmental factors are especially attractive for quantitative trait locus mapping. Here, we describe the adaptation of a nondestructive in vivo gel-based root imaging platform for use in maize (Zea mays). We identify a large number of contrasting RSA traits among 25 founder lines of the maize nested association mapping population and locate 102 quantitative trait loci using the B73 (compact RSA)×Ki3 (exploratory RSA) mapping population. Our results suggest that a phenotypic tradeoff exists between small, compact RSA and large, exploratory RSA.
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