| Abstrakt: |
Despite the importance of barley in animal feed, its forage quality has not been enough used as a selection criterion in breeding programs. To look for the genomic regions affecting barley forage quality, a population of 72 F1 − derived doubled haploid lines (DH) from the cross `Steptoe/ Morex΄ and their two parents were planted in Karaj and Zabol provinces of Iran, in each under a randomized complete block arrangement with two replications. Forage samples were oven-dried and ground and dry matter digestibility (DMD), acid detergent fiber (ADF), neutral detergent fiber (NDF), acid detergent lignin, crude fiber (CF), crude protein (CP), water-soluble carbohydrates and ash content were measured by NIRS. Analyses of variance showed that genotype, environment and `genotype - environment΄ interaction have significant effects on almost all studied traits. Several QTLs were resolved for each studied trait in both environments. Highest LOD scores were obtained for CF, ADF and DMD on chromosome 2H and for ash and CP on chromosomes 3H and 5H, respectively. QTLs for NDF were present on all chromosomes except 4H and 7H. `QTL-environment΄ interaction and the specificity of these QTLs are discussed. [ABSTRACT FROM AUTHOR] |
