Claim · model-written summary
Genome duplication, chromosomal/segmental duplications and tandem duplication were observed in the Brassica napus WRKY gene family.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Outcome
- genome duplication, chromosomal/segmental duplications and tandem duplicatione1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“Brassica napus”
e1“we observed genome duplication, chromosomal/segmental duplications and tandem duplication”
Title
Yajun He; Shaoshuai Mao; Yulong Gao; et al. PLoS ONE 2016. doi:10.1371/journal.pone.0157558
Other claims from this paper (18)
- Observation A genome-wide analysis identified 287 WRKY genes with 343 WRKY domains in the Brassica napus genome.
- Observation Of the WRKY genes identified in Brassica napus, 139 are in the A sub-genome.
- Observation Of the WRKY genes identified in Brassica napus, 148 are in the C sub-genome.
- Observation The Brassica napus WRKY genes were classified into eight groups based on phylogenetic analysis.
- Observation In Brassica napus, 26 WRKY members showed divergence in the WRKY domain.
- Observation Of the 26 members with a divergent WRKY domain in Brassica napus, 21 belonged to group I.
- Observation The authors suggest that WRKY genes in group I are more active and variable than genes in other groups.
- Mechanism The authors state that all of these duplications contributed to the expansion of the WRKY gene family in Brassica napus.
- Observation Detected duplicate segments indicated that genome duplication events occurred in the diploid progenitors B. rapa and B. olearecea before they combined to form B. napus.
- Observation Analysis of public microarray and EST databases indicated that 74 WRKY genes were induced or preferentially expressed under stress conditions in Brassica napus.
- Observation Public QTL data identified 77 WRKY genes in 31 QTL regions related to various stress tolerance in Brassica napus.
- Intervention effect By qRT-PCR, most of 26 BnaWRKY genes were induced by low temperature, salinity and drought stress.
- Mechanism The authors conclude that the WRKYs play important roles in Brassica napus stress responses.
- Observation Three BnaWRKY genes were strongly responsive to the three multiple stresses simultaneously.
- Recommendation The authors suggest that these 3 WRKY genes may have multi-functional roles in stress tolerance and can potentially be used in breeding new rapeseed cultivars.
- Observation Six tandem repeat pairs of BnaWRKY genes exhibited similar expression profiles under the various stress conditions.
- Observation Three of the tandem repeat pairs were mapped in stress related QTL regions.
- Mechanism The authors interpret the results as indicating that tandem duplicate WRKYs act in adaptive responses to environmental stimuli during evolution.