Wissensbasierte Nutzung der Biomasse von Hybridroggen: Vom Phänotyp zum QTL
Winter rye is an attractive crop as substrate for biogas production. Mean values of biomass yield were si-milar for rye and triticale in the official VCU trials in Germa-ny in 2015. We aimed to estimate quantitative-genetic pa-rameters and quantitative trait loci (QTL) in diverse rye materials for biomass yield and related traits. We analyzed genetic resources for population per se and testcross per-formance (exp. 1) and a biparental population of 258 test-crosses (exp. 2) across seven environments. Genotypic vari-ances for biomass yield were significant (P<0.01) in both experiments. Estimates of entry-mean heritability were high for plant height and moderate for yield traits. The genotypic correlation between biomass and grain yield among the testcross progeny was moderate (rg=0.53), but high between biomass yield and plant height measure-ments (rg=0.7-0.9). Accordingly, common QTL for plant height and biomass yield were found. Indirect selection for high dry matter yield using plant height resulted in a higher expected gain per cycle than using direct selection for bio-mass yield (1.9 dt/ha vs. 1.5 dt/ha). The observed broad genetic variation for biomass yield in elite hybrid rye gives good prospects for the use as a resource of renewable energy.