Registration of the OS9XQ36 Mapping Population of Wheat ( Triticum aestivum L.)

Abstract

The OS9XQ36 wheat ( Triticum aestivum L.) mapping population (Reg. No. MP‐2, NSL 465170) is a set of 164 F 6 –derived recombinant inbred lines (USDA–ARS Germplasm Resources Information Network [GRIN] accession no. GSTR 11903 through GSTR 12066 ) from the cross between OS9A (PI 658243), a single plant selection from the cultivar Stephens (CI 17596), and QCB36 (PI 658244), a single plant selection from the elite breeding line OR9900553. This population was developed to investigate the consistently lower grain hardness and superior end‐use quality of OR9900553 compared with Stephens. This population has also been genotyped with diversity array technology (DArT) and simple sequence repeat (SSR) markers resulting in the construction of a 270‐marker linkage map covering 1785 cM at a density of one marker per 7 cM. This F 6 –derived population is one of 20 mapping populations being used by the WheatCAP consortium ( http://maswheat.ucdavis.edu/ ) for extensive quantitative trait locus analysis and forms part of a publicly available long‐term genetic resource to map complex traits in wheat.