The Quantitative Genetic Control of Root Architecture in Maize

Plant & Cell Physiology
Adam L Bray, Christopher N Topp

Abstract

Roots remain an underexplored frontier in plant genetics despite their well-known influence on plant development, agricultural performance and competition in the wild. Visualizing and measuring root structures and their growth is vastly more difficult than characterizing aboveground parts of the plant and is often simply avoided. The majority of research on maize root systems has focused on their anatomy, physiology, development and soil interaction, but much less is known about the genetics that control quantitative traits. In maize, seven root development genes have been cloned using mutagenesis, but no genes underlying the many root-related quantitative trait loci (QTLs) have been identified. In this review, we discuss whether the maize mutants known to control root development may also influence quantitative aspects of root architecture, including the extent to which they overlap with the most recent maize root trait QTLs. We highlight specific challenges and anticipate the impacts that emerging technologies, especially computational approaches, may have toward the identification of genes controlling root quantitative traits.

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Citations

Nov 7, 2019·Nature·Julia Bailey-SerresJulian I Schroeder
May 12, 2020·Plant & Cell Physiology·Keiichi MochidaTakashi Hirayama
May 28, 2020·Frontiers in Plant Science·J Calleja-CabreraM Pernas
May 10, 2020·Journal of Experimental Botany·Nathanaël Prunet, Keith Duncan
Apr 27, 2019·Applications in Plant Sciences·Jitrana KengkannaPatompong Saengwilai
Feb 9, 2021·Emerging Topics in Life Sciences·Tyler DowdChristopher N Topp

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