Abstract
Seedlots of meadow rescue ( Festuca pratensis Huds.), timothy ( Phleum pratense L.), and perennial ryegrass ( Lolium perennial L.) were increased for two to four consecutive generations at one location in Germany and three locations in the United States. The population structure and forage yields of the original seed and advanced generations were investigated at Weihenstephan, Germany. All meadow rescue progenies were significantly taller and earlier and made better regrowth than the original seed. American lots and the corresponding German populations did not significantly differ in these characters. In timothy, variation of plant characteristics among locations and generations was neglegible. In perennial ryegrass, most progenies were significantly more vigorous in spring, earlier and taller than the original lot. American lots from lower latitudes were taller and earlier. The fourth subsequent generation from the most south. erly location, Shafter, Calif., headed 6 days earlier and grew 11 cm taller than the original lot. Percentage of seedling fluorescence of samples from the United States did not differ from the corresponding German progenies. There was no detrimental effect on dry‐matter forage yield due to seed multiplication in the United States.
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Claims 9
Claim · model-written summary
All meadow fescue progenies from seed multiplication were significantly taller, earlier and regrew better than the original seed.
Verbatim
t0“Seed Multiplication”
e0“All meadow rescue progenies were significantly taller and earlier and made better regrowth than the original seed”
Claim · model-written summary
American lots and the corresponding German populations of meadow fescue did not differ significantly in these characters.
Verbatim
t0“Meadow Fescue”
e0“American lots and the corresponding German populations did not significantly differ in these characters”
Claim · model-written summary
In timothy, variation of plant characteristics among locations and generations was negligible.
- Taxon
- timothy
Phleum pratensee0 - Outcome
- variation of plant characteristicse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In timothy, variation of plant characteristics among locations and generations was neglegible”
Claim · model-written summary
In perennial ryegrass most progenies were significantly more vigorous in spring, earlier and taller than the original lot.
- Taxon
- perennial ryegrass
Lolium perennee0 - Treatment
- Seed Multiplicationt0
- Outcome
- more vigorous in spring, earlier and tallere0
- Direction
- significantlye0
- Comparator
- the original lote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Multiplication”
e0“In perennial ryegrass, most progenies were significantly more vigorous in spring, earlier and taller than the original lot”
Claim · model-written summary
In perennial ryegrass American lots from lower latitudes were taller and earlier.
- Taxon
- perennial ryegrassLolium perennee1
- Material
- American lots from lower latitudese0
- Outcome
- taller and earliere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In perennial ryegrass”
e0“American lots from lower latitudes were taller and earlier”
Claim · model-written summary
The fourth generation from the southernmost location headed 6 days earlier than the original perennial ryegrass lot.
- Taxon
- perennial ryegrassLolium perennee1
- Material
- fourth subsequent generatione0
- Outcome
- headede0
- Direction
- earliere0
- Value
- 6 dayse0
- Comparator
- the original lote0
- Setting
- Shafter, Calif.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In perennial ryegrass”
e0“The fourth subsequent generation from the most south. erly location, Shafter, Calif., headed 6 days earlier and grew 11 cm taller than the original lot”
Claim · model-written summary
The fourth generation from the southernmost location grew 11 cm taller than the original perennial ryegrass lot.
- Taxon
- perennial ryegrassLolium perennee1
- Material
- fourth subsequent generatione0
- Outcome
- grewe0
- Direction
- tallere0
- Value
- 11 cme0
- Comparator
- the original lote0
- Setting
- Shafter, Calif.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In perennial ryegrass”
e0“The fourth subsequent generation from the most south. erly location, Shafter, Calif., headed 6 days earlier and grew 11 cm taller than the original lot”
Claim · model-written summary
Seedling fluorescence percentage of US samples did not differ from the corresponding German progenies.
Verbatim
t0“Forage Species”
e0“Percentage of seedling fluorescence of samples from the United States did not differ from the corresponding German progenies”
Claim · model-written summary
Seed multiplication in the United States had no detrimental effect on dry-matter forage yield.
- Taxon
- Forage Speciest0
- Treatment
- seed multiplication in the United Statese0
- Outcome
- dry‐matter forage yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
t0“Forage Species”
e0“There was no detrimental effect on dry‐matter forage yield due to seed multiplication in the United States”