Claim · model-written summary
The sex-linked regions coincide with the pericentromere regions in Hippophae.
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HippophaeNot 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“Heteromorphic XY chromosomes with pericentromeric recombination suppression in Hippophae (Elaeagnaceae)”
e3“The SLRs coincide with the pericentromere regions, which already in the ancestor of Hippophae were greatly enlarged by the insertion of another chromosome”
Title
Yiling Li; Deyan Wang; Pengchuan Sun; et al. New Phytologist 2026. doi:10.1111/nph.71059
Other claims from this paper (9)
- Observation In H. rhamnoides the X chromosome is 30% larger than the Y.
- Observation In H. tibetana the X chromosome is 15% larger than the Y.
- Mechanism The larger X chromosome of H. rhamnoides is due mainly to repetitive sequence accumulation on the X and extensive gene loss on the Y.
- Observation The older sex-linked stratum S1 is dated to 6.3-7.6 million years ago.
- Observation The younger sex-linked stratum S2 is dated to 1.9-2.5 Ma.
- Observation The younger stratum S2 has more species-specific inversions than S1.
- Observation The pericentromere regions were greatly enlarged in the ancestor of Hippophae by the insertion of another chromosome.
- Observation Dosage compensation occurs primarily in the floral tissues of Hippophae.
- Mechanism Dosage compensation in Hippophae occurs mainly through downregulation of female X-specific genes.