Claim · model-written summary
Selection based on SCA appears questionable, although it might succeed for initial spring production.
- Taxon
- Orchardgrass
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Dactylis glomeratat0 - Outcome
- Selection based on SCAe0
- Qualifier
- initial spring productione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
t0“Orchardgrass”
e0“Selection based on SCA appears questionable, although it might be successful for initial spring production”
Title
E. F. McClain Crop Science 1981. doi:10.2135/cropsci1981.0011183x002100040013x
Other claims from this paper (11)
- Observation General combining ability (GCA) for forage yield in orchardgrass was significant for most harvests, seasons and years and for total 4-year production.
- Observation Specific combining ability (SCA) for forage yield was significant for spring and annual production of the first 2 years.
- Observation The interactions of GCA with seasons and of SCA with years were significant.
- Observation Interseasonal correlation coefficients for GCA effects were 0.25, 0.45 and 0.58 for spring vs. summer, spring vs. fall and summer vs. fall.
- Observation Interseasonal correlation coefficients for SCA effects were 0.64, 0.19 and 0.63 for spring vs. summer, spring vs. fall and summer vs. fall.
- Observation Interannual correlation coefficients of GCA effects based on annual yields in consecutive years were -0.16, 0.45 and 0.65.
- Observation Interannual correlation coefficients of SCA effects based on annual yields in consecutive years were 0.42, 0.38 and -0.18.
- Observation The data suggested an annual recurrence of relative seasonal magnitudes of GCA and SCA.
- Observation Interannual stability of GCA increased as the orchardgrass stand aged.
- Observation Interannual stability of SCA decreased as the orchardgrass stand aged.
- Recommendation Selection for forage production based on GCA would probably be most effective on a seasonal basis in the 3rd year after seeding.