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Observationobservedoriginal resultmeasured

Claim · model-written summary

Knob positions were incompatible with neutral or slightly deleterious repetitive DNA.

Taxon
maizeZea mayst0
Outcome
Knob chromosomal positione0
Qualifier
incompatible with the hypothesis that knob repetitive DNA is neutral or slightly deleterious to the genomee0

Verbatim

e0

“Knob chromosomal position was incompatible with the hypothesis that knob repetitive DNA is neutral or slightly deleterious to the genome.”

✓ located verbatim in the source · abstract, characters 966–1103
t0

“Maize”

✓ located verbatim in the source · title, characters 48–53

Title

Meiotic Drive of Chromosomal Knobs Reshaped the Maize Genome

Edward S Buckler; Tara L Phelps-Durr; Carlyn S Keith Buckler; et al. Genetics 1999. doi:10.1093/genetics/153.1.415

Other claims from this paper (6)
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Meiotic drive and linkage may have reshaped maize genetic diversity in response to Ab10.

Taxon
maizeZea mayse0
Gene
Ab10e0
Outcome
genetic diversity throughout the maize genomee0
Qualifier
meiotic drive and genetic linkagee0

Verbatim

e0

“the combined effects of meiotic drive and genetic linkage may have reshaped genetic diversity throughout the maize genome in response to the presence of Ab10.”

✓ located verbatim in the source · abstract, characters 1273–1431

Title

Meiotic Drive of Chromosomal Knobs Reshaped the Maize Genome

Edward S Buckler; Tara L Phelps-Durr; Carlyn S Keith Buckler; et al. Genetics 1999. doi:10.1093/genetics/153.1.415

Other claims from this paper (6)
Observationobservedoriginal resultmeasured

Claim · model-written summary

TR-1 restriction fragment fingerprints and copy number vary among maize lines and chromosomes.

Taxon
maizeZea mayse0
Gene
TR-1e0
Outcome
Variation in restriction fragment fingerprints and copy numbere0

Verbatim

e0

“Variation in restriction fragment fingerprints and copy number of the TR-1 elements was found among maize lines and among maize chromosomes”

✓ located verbatim in the source · abstract, characters 604–743

Title

A knob-associated tandem repeat in maize capable of forming fold-back DNA segments: Are chromosome knobs megatransposons?

E. V. Ananiev; R. L. Phillips; H. W. Rines Proceedings of the National Academy of Sciences 1998. doi:10.1073/pnas.95.18.10785

Other claims from this paper (6)
Observationobservedoriginal resultmeasured

Claim · model-written summary

The 180-bp knob repeats occurred on every examined maize chromosome, with copy numbers of approximately 100 to 25,000.

Taxon
maizeZea mayse0
Outcome
copy numbere0
Value
approximately 100 to 25, 000e0

Verbatim

e0

“180-bp repeats found in knobs are present in each of these maize chromosomes, but the copy number varies from approximately 100 to 25, 000”

✓ located verbatim in the source · abstract, characters 330–468

Title

Complex Structure of Knob DNA on Maize Chromosome 9: Retrotransposon Invasion into Heterochromatin

E V Ananiev; R L Phillips; H W Rines Genetics 1998. doi:10.1093/genetics/149.4.2025

Other claims from this paper (7)
Mechanismauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Neocentromeres are mobilized on microtubules by minus end-directed motor proteins.

Taxon
maizeZea mayse0
Outcome
mobilized on microtubulese7
Qualifier
minus end-directed motor proteinse7

Verbatim

e0

“In maize, neocentromeres are induced by a gene or genes on Abnormal chromosome 10 (Ab10) which causes heterochromatic knobs to move poleward at meiotic anaphase”

✓ located verbatim in the source · abstract, characters 83–243
e7

“We argue that neocentromeres are mobilized on microtubules by the activity of minus end-directed motor proteins”

✓ located verbatim in the source · abstract, characters 1338–1449

Title

Neocentromere-mediated Chromosome Movement in Maize

Hong-Guo Yu; Evelyn N. Hiatt; Annette Chan; et al. The Journal of Cell Biology 1997. doi:10.1083/jcb.139.4.831

Other claims from this paper (8)
Observationobservedoriginal resultmeasured

Claim · model-written summary

Small TR-1 and 180-bp repeat clusters occur on different chromosomes, some outside obvious knob heterochromatin.

Taxon
maizeZea mayse1
Gene
TR-1e0
Outcome
several small clusterse0

Verbatim

e0

“several small clusters of the TR-1 and 180-bp repeats have been found in different chromosomes, some not located in obvious knob heterochromatin”

✓ located verbatim in the source · abstract, characters 458–602
e1

“other maize chromosomes”

✓ located verbatim in the source · abstract, characters 263–286

Title

A knob-associated tandem repeat in maize capable of forming fold-back DNA segments: Are chromosome knobs megatransposons?

E. V. Ananiev; R. L. Phillips; H. W. Rines Proceedings of the National Academy of Sciences 1998. doi:10.1073/pnas.95.18.10785

Other claims from this paper (6)
Observationobservedoriginal resultmeasured

Claim · model-written summary

Two satellites and interstitial bands were observed in the Korean maize stocks.

Taxon
maizeZea mayse0
Outcome
satellites and interstitial bandse3
Value
twoe3

Verbatim

e0

“A Giemsa C-banding method was used for the identification of somatic chromosomes of Korean indigenous maize(Zea mays L.)”

✓ located verbatim in the source · abstract, characters 0–120
e3

“Ten deeply stained heterochromatic knobs whose position and size were different between the genotypes, two satellites and interstitial bands were observed”

✓ located verbatim in the source · abstract, characters 216–370

Title

C-banding Pattern of Mitotic Chromosome in Korean Indigenous Maize

In Sup Lee; Bong Ho Choe; J. P. Gustafson The Korean Journal of Crop Science 1996

Other claims from this paper (4)
Observationobservedoriginal resultmeasured

Claim · model-written summary

TR-1 is a 350-bp tandem repeat isolated from maize chromosome 9 knob DNA.

Taxon
Zea mays L.Zea mayse0
Gene
TR-1e0
Outcome
tandemly repeated DNA sequencese0
Value
350-bpe0

Verbatim

e0

“A class of tandemly repeated DNA sequences (TR-1) of 350-bp unit length was isolated from the knob DNA of chromosome 9 of Zea mays L.”

✓ located verbatim in the source · abstract, characters 0–133

Title

A knob-associated tandem repeat in maize capable of forming fold-back DNA segments: Are chromosome knobs megatransposons?

E. V. Ananiev; R. L. Phillips; H. W. Rines Proceedings of the National Academy of Sciences 1998. doi:10.1073/pnas.95.18.10785

Other claims from this paper (6)
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Kinetochore-mediated chromosome movement is only marginally affected by a linked neocentromere.

Taxon
maizeZea mayse0
Treatment
the activity of a linked neocentromeree4
Outcome
Kinetochore-mediated chromosome movemente4
Direction
only marginally affectede4

Not reportedComparator

Verbatim

e0

“In maize, neocentromeres are induced by a gene or genes on Abnormal chromosome 10 (Ab10) which causes heterochromatic knobs to move poleward at meiotic anaphase”

✓ located verbatim in the source · abstract, characters 83–243
e4

“Kinetochore-mediated chromosome movement is only marginally affected by the activity of a linked neocentromere”

✓ located verbatim in the source · abstract, characters 914–1024

Title

Neocentromere-mediated Chromosome Movement in Maize

Hong-Guo Yu; Evelyn N. Hiatt; Annette Chan; et al. The Journal of Cell Biology 1997. doi:10.1083/jcb.139.4.831

Other claims from this paper (8)
Observationobservedoriginal resultmeasured

Claim · model-written summary

TR-1 arrays up to 70 kilobases long can be interspersed with 180-bp tandem repeat arrays.

Taxon
maizeZea mayse1
Gene
TR-1e0
Outcome
interspersed with stretches of 180-bp tandem repeat arrayse0
Value
70 kilobasese0

Verbatim

e0

“TR-1 tandem arrays up to 70 kilobases in length can be interspersed with stretches of 180-bp tandem repeat arrays”

✓ located verbatim in the source · abstract, characters 745–858
e1

“other maize chromosomes”

✓ located verbatim in the source · abstract, characters 263–286

Title

A knob-associated tandem repeat in maize capable of forming fold-back DNA segments: Are chromosome knobs megatransposons?

E. V. Ananiev; R. L. Phillips; H. W. Rines Proceedings of the National Academy of Sciences 1998. doi:10.1073/pnas.95.18.10785

Other claims from this paper (6)

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