Project description:Purpose: The goal of this study was to investigate the mechanisms involved in the initiation and development of crown-roots (CRs) in barley and to estimate the role of cytokinins (CKs) in this process. Method: stranded libraries were obtained from RNA extracted from the stem base of 1 day-after-germination (DAG) and 10DAG-seedlings of wild-type (WT) and AtCKX-overexpressing barley lines (OE-CKX). OE-CKX lines have a reduced content of endogenous CKs and are characterized by a higher number of CRs. Libraries were deep sequenced on Illumina HighSeq platform. Each sample was investigated in three independent biological replicates. Results: Using a data analysis workflow optimized for barley, we identified more than 4000 transcripts differentially expressed in the stem base of 1DAG and 10DAG-seedlings. Expression as determined by RNA-seq was validated by real-time PCR. Our data were compared to the transcriptomic profiling obtained from rice and we were able to identify genes potentially involved in the initiation/development of CRs in barley. Also the use of the transgenic line with altered endogenous CK content allowed us to conclude about the role of CKs in the process. Conclusions: Our study represents the first analysis aiming to understand the initiation and development of CRs in barley.
Project description:NILs containing five parental lines, three wild barley genotypes ssp. spontaneum: HID 4 (A), Iraq; HID 64 (B), Turkey; and HID 369 (C), Israel, one ssp. agriocrithon: HID 382(D)) and cv. Morex (ssp. vulgare, USA). Purpose: Variant calling to identifie markers associated with a awn length QTL on the distal part of chromosome 7HL