Claim · model-written summary
Dosage compensation in Hippophae occurs mainly through downregulation of female X-specific genes.
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HippophaeNot reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
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)”
e4“Dosage compensation occurs primarily in floral tissues and mainly through downregulation of female X-specific genes”
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 sex-linked regions coincide with the pericentromere regions in Hippophae.
- 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.