Registration of the TM-1/NM24016 Cotton Recombinant Inbred Mapping Population

The TM-1/NM24016 cotton (Gossypium hirsutum L.) mapping population (Reg. No. MP-1, NSL 477435 MAP) consists of 95 F5:9 recombinant inbred lines. This cotton mapping population was constructed from a cross between inbred lines TM-1 (PI 662944 MAP), the genetic standard for G. hirsutum, and NM24016 (PI 662945 MAP), an advanced selection with introgressed traits from G. barbadense L. and G. hirsutum. In 2007, the population was released jointly by the Plant Physiology and Genetics Research Unit, USDA-ARS, Maricopa, AZ and New Mexico State Agricultural Experiment Station, Las Cruces, NM. The primary goal was to construct a mapping population segregating for attributes introgressed from G. barbadense into a G. hirsutum germplasm background. The TM-1/NM24016 population was genotyped with 392 simple sequence repeat markers. A wide range of phenotypic diversity among individuals was observed for fi ber and agronomic traits, with transgressive variation for the majority of fi ber traits. The registration of this recombinant inbred mapping population provides geneticists and breeders with an opportunity to explore the genetic basis of transgressive variation in cotton and exploit potentially novel allelic combinations for the genetic improvement of fiber quality and other traits in G. hirsutum.