W447The Genetic Architecture of Maize Nodal Root Number during Domestication
The Genetic Architecture of Maize Nodal Root Number during Domestication
Date: Saturday, January 14, 2017
Time: 4:55 PM
Time: 4:55 PM
Room: Golden West
Maize nodal root system plays a crucial role in the development of the above-ground
plant parts and determines the yield via water and nutrient uptake for mature plants in
the field. However, the genetic basis of maize nodal root system remains unknown and
it has become the darkest matter of the maize domestication process. Here, through a
large teosinte-maize population, our high-resolution mapping revealed that 62 out from
133 quantitative trait loci (QTLs), accounting for approximately half of the total genetic
variations of nodal root number, were donated by flowering time. In contrast, only 16%
of the total genetic variations of nodal root number were derived from plant height.
These results suggested that flowering time played a key role in the reshaping of nodal
root number during maize domestication. In addition, our results supported that few
crown roots might be favored in temperate maize.
plant parts and determines the yield via water and nutrient uptake for mature plants in
the field. However, the genetic basis of maize nodal root system remains unknown and
it has become the darkest matter of the maize domestication process. Here, through a
large teosinte-maize population, our high-resolution mapping revealed that 62 out from
133 quantitative trait loci (QTLs), accounting for approximately half of the total genetic
variations of nodal root number, were donated by flowering time. In contrast, only 16%
of the total genetic variations of nodal root number were derived from plant height.
These results suggested that flowering time played a key role in the reshaping of nodal
root number during maize domestication. In addition, our results supported that few
crown roots might be favored in temperate maize.