Claim · model-written summary
Centromere gene density was much lower than whole-genome gene density.
- Taxon
- I. cordatotriloba
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Ipomoea cordatotrilobae0 - Outcome
- gene density in the centromere regione1
- Direction
- much lowere1
- Value
- 1.36 genes/100 kbe1
- Comparator
- entire genomee1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“a variety of I. cordatotriloba”
e1“The gene density in the centromere region (1.36 genes/100 kb) is much lower than that of the entire genome (8.85 genes/100 kb)”
Title
Xiaoshu, a simple genetic model system for sweetpotato (Ipomoea batatas (L.) Lam.)
Shizhuo Xiao; Yao Wang; Zhilin Zhou; et al. Plant Biotechnology Journal 2024. doi:10.1111/pbi.14528
Other claims from this paper (19)
- Observation Xiaoshu is day-neutral and blooms about 50–60 days after sowing.
- Observation Xiaoshu is self-compatible, naturally pollinated and produces seeds throughout growth.
- Observation Xiaoshu has a swollen root with irregular secondary cambiums and starch-filled parenchyma cells.
- Observation Under suitable conditions, swollen xiaoshu roots germinate and grow seedlings without external nutrients.
- Observation The estimated xiaoshu genome size was 478.62 Mbp.
- Observation Xiaoshu genome heterozygosity was 0.17% and repetitive sequences were 59.53%.
- Method / resource A gap-free, 15-chromosome xiaoshu reference genome totaled 454 814 757 bp.
- Method / resource The genome assembly identified 1586 of 1614 plant-specific orthologues.
- Method / resource The xiaoshu genome annotation predicted 40 238 protein-coding genes, of which 37 834 were functionally annotated.
- Observation Phylogenetic analysis placed xiaoshu closest to I. triloba.
- Observation Xiaoshu and sweetpotato branches diverged about 7.12 Mya.
- Observation Xiaoshu had 398 expanded and 436 contracted gene families relative to eight species or varieties.
- Observation Five beta-glucosidase BoGH3B genes were significantly more expressed in roots than stems and leaves.
- Observation Xiaoshu shared 17 987 gene families with sweetpotato, or 86.8% of sweetpotato families.
- Observation The xiaoshu genome contained 2372 insertions and 5938 deletions relative to sweetpotato.
- Method / resource The assembly identified 30 telomeres and 14 centromeres.
- Method / resource Xiaoshu transformation reached a 95.65% success rate.
- Method / resource CRISPR-Cas9 targeting PDS yielded two albino shoots among five transgene-positive shoots.
- Association Higher IbMYB1 expression in transgenic xiaoshu roots was associated with higher anthocyanin content.