Registration of the NyH (Ny821×H99) Maize Recombinant Inbred Mapping Population

Abstract

The Ny821×H99 (NyH) maize (Zea mays L.) mapping population (MP‐4, NSL 511548 MAP) is composed of 234 recombinant inbred lines (RILs). The population was developed from an initial cross between inbred lines Ny821 and H99 (PI 587129). The parents of this population were selected on the basis of variation for low phosphorus tolerance, with the parent with higher tolerance, Ny821, having a highly branched root system and the parent with lower tolerance, H99, having a simple root system. The population segregates for a number of agronomic traits, including plant height, ear height, leaf number, and flowering time. A genotype‐by‐sequencing approach was utilized to produce a high‐density genetic map. This population, coupled with the dense genetic marker map, is a useful resource for analysis of traits such as root architecture and abiotic stress tolerance.