Claim · model-written summary
Three unrelated homozygous maize lines TS11, P22 and ST156 were identified whose hybrids showed absent or insignificant heterosis.
Zea maysNot reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three unrelated homozygous maize lines, TS11, P22, and ST156”
e1“that produced hybrids in which heterosis was either absent or insignificant were identified”
Title
[Absence of heterosis in hybrid corn. Description of the effect].
S T Chalyk PubMed 2000
Other claims from this paper (5)
- Observation The hybrids lacking heterosis were phenotypically similar to self-pollinated homozygous lines.
- Mechanism Reciprocal crosses showed that absence of heterosis is controlled by nuclear genes and not associated with the cytoplasm of the inbred lines.
- Mechanism Analysis of F2 plants showed that lines TS11, P22 and ST156 contained allelic genes determining the absence of heterosis in hybrids.
- Observation Crosses of lines TS11, P22 and ST156 with the common selection line 092 generated hybrids with normal heterosis.
- Mechanism The authors conclude that heterozygosity or homozygosity of particular genes in lines TS11, P22 and ST156 plays a pivotal role in manifestation or absence of hybrid vigor.