Characterization of the multiple crossing tropical wheat “magic population” using SSR marker associated with physiological characters

Abstract

Heat stress is a challenge in the development of wheat in tropical environments. Characterization of heat tolerant wheat lines based on physiological characters is still very rarely carried out in tropics, therefore early detection using heat stress linked markers related to physiological characters is very necessary in order to produce adaptive wheat varieties in tropics. The study aims to characterize wheat lines from the “magic population” crossing based on SSR markers related to physiological characters and identified by field observations. The research used 23 genotypes for SSR marker characterization and continued to field experiment using 10 selected genotypes with Guri-5 Agritan and Guri-6 Agritan varieties as check. The experiment was arranged in randomized block design with 3 replications. The results showed polymorphism on Xbarc84 and Xgwm285 markers at the genotypes number 203, 145 and 184. Xbarc84 markers could show a relation to flowering time on genotype 203 with longer flowering time and harvest time. Xgwm285 marker show relation to HTI at genotypes no.145 with no band was formed, and the genotypes show weakness on growing in the field and did not show any relation on genotypes no.184. Correlation analysis between characters showed that SRF, SL and NSp characters could be used as secondary characters for heat tolerance wheat selection.