QTL mapping and phenotypic variation for root architectural traits in maize (Zea mays L.).
Burton AL, Johnson JM, Foerster JM, Hirsch CN, Buell CR, Hanlon MT, Kaeppler SM, Brown KM, Lynch JP. QTL mapping and phenotypic variation for root architectural traits in maize (Zea mays L.). Theor Appl Genet. 2014 Nov; 127(11):2293-311.