Claim · model-written summary
The authors proposed intragenomic conflict between B chromosomes and heterochromatic knobs in maize landraces.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the negative relationship found between Bs and heterochromatic knobs allowed us to propose the existence of an intragenomic conflict between these elements.”
e1“native Argentinian and Bolivian maize landraces”
Title
CAUSES AND CONSEQUENCES OF DNA CONTENT VARIATION IN ZEA
G.E. González; M.F. Realini; M.F. Fourastié; et al. Journal of Basic and Applied Genetics 2022. doi:10.35407/bag.2022.33.01.03
Other claims from this paper (10)
- Observation Zea species varied in genome size, with mean 2C-values of 4.20 to 11.36 pg.
- Observation Genome size in the maize landraces varied from 4.20 to 6.75 pg.
- Mechanism Differences in knob heterochromatin and retrotransposon DNA were attributed as the main sources of genome size variation in Zea.
- Observation B-chromosome presence and frequency contributed to genome size variation in maize landraces, with doses from one to eight.
- Association Heterochromatin percentage was positively correlated with genome size in Zea.
- Association Maize populations at higher altitudes had smaller genomes than those at lower altitudes.
- Association Vegetative cycle length was positively correlated with heterochromatin percentage in maize landraces.
- Association B chromosomes and heterochromatic knobs had a negative relationship in maize landraces.
- Mechanism The authors proposed that heterochromatin has an adaptive role in maize landraces.
- Mechanism The authors hypothesized that intranuclear conflict produced an optimal nucleotype that adjusted the vegetative cycle of maize landraces across altitude.