Phenotyping and genotyping of an elite wheat double-haploid population: grain yield strategies in contrasting environments and QTL analysis

GUILLERMO A. GARCÍA; AHMED K. HASAN; DANIELA V. BUSTOS; LAURA E. PUHL; DANIEL F. CALDERINI; MATTHEW P. REYNOLDS; SIMON GRIFFITHS; LUZIE WINGEN; DANIEL J. MIRALLES

Cd. Obregón

Workshop; 3rd International Workshop of the Wheat Yield Consortium; 2013

CIMMYT

This work describes the physiological performance of an elite wheat mapping population derived from modern cultivars with similar phenology but different and stable combinations of grain number per unit area (GN) and grain weight (GW), which was grown in four contrasting environments. The population has been genotyped using 322 genetic markers: 151 DarT markers, 96 SSR markers, 66 SNP markers, and 7 gene based markers. Of these markers, 272 could be put into linkage groups, resulting in a map length of 1191 cM. All wheat chromosomes, except 5D, are represented in the map. An important phenotypic variation was observed in physiological and numerical yield components, in combination with favorable expression of all agronomic traits. Therefore, this population represents a valuable resource for fine phenotyping in order to understand the physiological and genetic bases of key traits linked with grain yield.