Claim · model-written summary
Cluster and principal component analyses grouped the smooth bromegrass cultivars according to their pedigrees rather than by ecotypes.
- Taxon
- Smooth bromegrass
Bromus inermise0 - Outcome
- grouped the cultivars according to their pedigreese2
- Comparator
- rather than by ecotypese2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Smooth bromegrass (Bromus inermis Leyss.), the most commonly cultivated perennial bromegrass species in North America, belong to three ecotypes”
e2“Cluster analysis and principle component analysis grouped the cultivars according to their pedigrees rather than by ecotypes”
Title
Yasas S. N. Ferdinandez; Bruce E. Coulman Crop Science 2004. doi:10.2135/cropsci2004.0241
Other claims from this paper (10)
- Observation Seven AFLP primer combinations produced 176 polymorphic markers in smooth bromegrass cultivars.
- Observation No ecotype- or cultivar-specific AFLP markers were found in smooth bromegrass.
- Observation The older southern cultivars grouped distantly to the rest of the cultivars.
- Observation The recently developed southern cultivars grouped closely with the intermediate type cultivars.
- Observation The northern type cultivars grouped with the recently developed southern and intermediate cultivars.
- Mechanism The close association of recently developed southern cultivars with intermediate and northern cultivars may indicate introgression of northern ecotype germplasm.
- Observation Within-population molecular variation (85%) was higher than among-population variation (15%) in the 14 cultivars.
- Association Higher molecular variation in recently developed southern and some northern cultivars may reflect diverse genetic backgrounds of the source populations.
- Observation The older southern cultivars showed the lowest molecular variation, attributed to a narrow genetic background.
- Method / resource AFLP markers can differentiate phenotypically similar smooth bromegrass cultivars according to their breeding history.