Claim · model-written summary
Univalent-bearing cells ranged from 2.9 to 9.7 percent among varieties.
Not reportedTaxonGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Verbatim
e0“The proportion of cells with univalents in the varieties varied from 2.9 per cent to 9.7 per cent”
Title
The Occurrence of Unpaired Chromosomes in Hybrids Between Varieties of Triticum vulgare
LILLIAN HOLLINGSHEAD CYTOLOGIA 1932. doi:10.1508/cytologia.3.119
Other claims from this paper (13)
- Observation Univalent-bearing cells ranged from 5.2 to 39.1 percent among hybrids.
- Observation Related-variety hybrids generally had lower univalent frequencies than unrelated-variety hybrids, with exceptions.
- Observation Two univalents per cell were most common, although up to eight were observed.
- Observation Trivalents and tetravalents were rare.
- Observation Some samples varied widely in percentage of cells with univalents.
- Association Anthers with most cells past metaphase had higher univalent frequency in first-metaphase cells.
- Observation Marquis plants at mean temperatures of 60° and 77°F had no significant univalent-frequency difference.
- Observation Univalents differed in size and shape among cells.
- Observation Univalents appeared longer in certain high-frequency hybrids than in certain varieties.
- Association Attenuated bivalents and bivalents with fewer chiasmata were more frequent in hybrids with frequent univalents.
- Observation Terminal or closely subterminal chiasmata were the usual configurations, with exceptions.
- Observation Some configurations previously called trivalents were interpreted here as bivalents.
- Mechanism The observations were interpreted as supporting a chiasma-reduction explanation for univalents.