---
OA_place: publisher
OA_type: hybrid
_id: '3672'
acknowledgement: This work was supported by a grant from the Natural Environment Research
Council.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Barton NH. The hybrid sink effect. Heredity. 1980;44:277-278. doi:10.1038/hdy.1980.23
apa: Barton, N. H. (1980). The hybrid sink effect. Heredity. Springer Nature.
https://doi.org/10.1038/hdy.1980.23
chicago: Barton, Nicholas H. “The Hybrid Sink Effect.” Heredity. Springer
Nature, 1980. https://doi.org/10.1038/hdy.1980.23.
ieee: N. H. Barton, “The hybrid sink effect,” Heredity, vol. 44. Springer
Nature, pp. 277–278, 1980.
ista: Barton NH. 1980. The hybrid sink effect. Heredity. 44, 277–278.
mla: Barton, Nicholas H. “The Hybrid Sink Effect.” Heredity, vol. 44, Springer
Nature, 1980, pp. 277–78, doi:10.1038/hdy.1980.23.
short: N.H. Barton, Heredity 44 (1980) 277–278.
date_created: 2018-12-11T12:04:33Z
date_published: 1980-04-01T00:00:00Z
date_updated: 2024-10-16T14:36:57Z
day: '01'
doi: 10.1038/hdy.1980.23
extern: '1'
intvolume: ' 44'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/hdy198023
month: '04'
oa: 1
oa_version: Published Version
page: 277 - 278
publication: Heredity
publication_identifier:
eissn:
- 1365-2540
issn:
- 0018-067X
publication_status: published
publisher: Springer Nature
publist_id: '2711'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The hybrid sink effect
type: journal_article
user_id: 0043cee0-e5fc-11ee-9736-f83bc23afbf0
volume: 44
year: '1980'
...
---
_id: '4334'
alternative_title:
- Symposia of the Royal Entomological Society
article_processing_charge: No
author:
- first_name: Godfrey
full_name: Hewitt, Godfrey
last_name: Hewitt
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: 'Hewitt G, Barton NH. The structure and maintenance of hybrid zones as exemplified
by Podisma pedestris. In: Blackman R, Ashburner M, eds. Insect Cytogenetics.
Vol 10. Wiley-Blackwell; 1980:149-170.'
apa: Hewitt, G., & Barton, N. H. (1980). The structure and maintenance of hybrid
zones as exemplified by Podisma pedestris. In R. Blackman & M. Ashburner (Eds.),
Insect Cytogenetics (Vol. 10, pp. 149–170). Wiley-Blackwell.
chicago: Hewitt, Godfrey, and Nicholas H Barton. “The Structure and Maintenance
of Hybrid Zones as Exemplified by Podisma Pedestris.” In Insect Cytogenetics,
edited by Roger Blackman and Michael Ashburner, 10:149–70. Wiley-Blackwell, 1980.
ieee: G. Hewitt and N. H. Barton, “The structure and maintenance of hybrid zones
as exemplified by Podisma pedestris,” in Insect Cytogenetics, vol. 10,
R. Blackman and M. Ashburner, Eds. Wiley-Blackwell, 1980, pp. 149–170.
ista: 'Hewitt G, Barton NH. 1980.The structure and maintenance of hybrid zones as
exemplified by Podisma pedestris. In: Insect Cytogenetics. Symposia of the Royal
Entomological Society, vol. 10, 149–170.'
mla: Hewitt, Godfrey, and Nicholas H. Barton. “The Structure and Maintenance of
Hybrid Zones as Exemplified by Podisma Pedestris.” Insect Cytogenetics,
edited by Roger Blackman and Michael Ashburner, vol. 10, Wiley-Blackwell, 1980,
pp. 149–70.
short: G. Hewitt, N.H. Barton, in:, R. Blackman, M. Ashburner (Eds.), Insect Cytogenetics,
Wiley-Blackwell, 1980, pp. 149–170.
date_created: 2018-12-11T12:08:19Z
date_published: 1980-01-01T00:00:00Z
date_updated: 2021-12-15T16:09:43Z
day: '01'
editor:
- first_name: Roger
full_name: Blackman, Roger
last_name: Blackman
- first_name: Michael
full_name: Ashburner, Michael
last_name: Ashburner
extern: '1'
intvolume: ' 10'
language:
- iso: eng
month: '01'
oa_version: None
page: 149 - 170
publication: Insect Cytogenetics
publication_identifier:
isbn:
- 9-780-6320-0552-9
publication_status: published
publisher: Wiley-Blackwell
publist_id: '1699'
quality_controlled: '1'
status: public
title: The structure and maintenance of hybrid zones as exemplified by Podisma pedestris
type: book_chapter
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 10
year: '1980'
...
---
OA_place: publisher
OA_type: hybrid
_id: '4335'
abstract:
- lang: eng
text: Genetic incompatibilities between two races of the grasshopper Podisma pedestris,
which differ by a Robertsonian fusion involving the sex chromosome, have been
investigated. Crosses were made between four populations spanning the chromosomal
cline; F1 hybrids between the races, though not between separated populations
of the same race, showed markedly reduced hatching success. Observations of the
fate of chromosomes transplanted across the cline supported this finding. Crosses
between grasshoppers from a mixed population in the cline showed a lower average
hatching success, but no correlation of this inviability with the chromosomal
polymorphism. The karyotypes of pre-diapause embryos from both types of cross
gave no evidence for non-disjunction of the sex chromosome trivalent in heterozygous
females; an upper limit of 16 per cent can be set on the non-disjunction rate.
These findings suggest that the karyotypic difference is only a weakly selected
marker for more fundamental changes in genotype.
acknowledgement: I would like to thank Dr G. M. Hewitt, and M. W. Shaw, for their
help in collecting these samples, Mrs T. M. East for her help in rearing them, and
M et Mme Aviotti for their hospitality in France. This work was supported by a N.E.R.C.
studentship, and by an S.R.C. grant to Dr G. M. Hewitt.
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Barton NH. The fitness of hybrids between two chromosomal races of the grasshopper
Podisma pedestris. Heredity. 1980;45:47-59. doi:10.1038/hdy.1980.49
apa: Barton, N. H. (1980). The fitness of hybrids between two chromosomal races
of the grasshopper Podisma pedestris. Heredity. Springer Nature. https://doi.org/10.1038/hdy.1980.49
chicago: Barton, Nicholas H. “The Fitness of Hybrids between Two Chromosomal Races
of the Grasshopper Podisma Pedestris.” Heredity. Springer Nature, 1980.
https://doi.org/10.1038/hdy.1980.49.
ieee: N. H. Barton, “The fitness of hybrids between two chromosomal races of the
grasshopper Podisma pedestris,” Heredity, vol. 45. Springer Nature, pp.
47–59, 1980.
ista: Barton NH. 1980. The fitness of hybrids between two chromosomal races of the
grasshopper Podisma pedestris. Heredity. 45, 47–59.
mla: Barton, Nicholas H. “The Fitness of Hybrids between Two Chromosomal Races of
the Grasshopper Podisma Pedestris.” Heredity, vol. 45, Springer Nature,
1980, pp. 47–59, doi:10.1038/hdy.1980.49.
short: N.H. Barton, Heredity 45 (1980) 47–59.
date_created: 2018-12-11T12:08:19Z
date_published: 1980-08-01T00:00:00Z
date_updated: 2024-10-16T14:38:31Z
day: '01'
doi: 10.1038/hdy.1980.49
extern: '1'
intvolume: ' 45'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/hdy198049
month: '08'
oa: 1
oa_version: Published Version
page: 47 - 59
publication: Heredity
publication_identifier:
eissn:
- 1365-2540
issn:
- 0018-067X
publication_status: published
publisher: Springer Nature
publist_id: '1697'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The fitness of hybrids between two chromosomal races of the grasshopper Podisma
pedestris
type: journal_article
user_id: 0043cee0-e5fc-11ee-9736-f83bc23afbf0
volume: 45
year: '1980'
...
---
_id: '3673'
abstract:
- lang: eng
text: The effect of a cline as a barrier to gene flow at closely linked, weakly
selected loci is investigated using a continuous diffusion model. It is shown
that a linked cline induces a step in the frequency of a neutral allele, which
is proportional to the gradient in neutral allele frequency and to the inverse
of the recombination rate. A barrier to dispersal or a local region of low abundance
has a similar effect (Nagylaki, 1976). The cline will block the flow of neutral
alleles over a region of chromosome roughly 2s/t map units long. However, a slightly
advantageous allele will be little affected, and must be very tightly linked to
be delayed for long.
acknowledgement: "I would like to thank Dr G. M. Hewitt for stimulating discussions,
and for his comments on the manuscript. This work was supported by the Natural Environmental
Research Council.\r\n"
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Barton NH. Gene flow past a cline. Heredity. 1979;43(3):333-339. doi:10.1038/hdy.1979.86
apa: Barton, N. H. (1979). Gene flow past a cline. Heredity. Springer Nature.
https://doi.org/10.1038/hdy.1979.86
chicago: Barton, Nicholas H. “Gene Flow Past a Cline.” Heredity. Springer
Nature, 1979. https://doi.org/10.1038/hdy.1979.86.
ieee: N. H. Barton, “Gene flow past a cline,” Heredity, vol. 43, no. 3. Springer
Nature, pp. 333–339, 1979.
ista: Barton NH. 1979. Gene flow past a cline. Heredity. 43(3), 333–339.
mla: Barton, Nicholas H. “Gene Flow Past a Cline.” Heredity, vol. 43, no.
3, Springer Nature, 1979, pp. 333–39, doi:10.1038/hdy.1979.86.
short: N.H. Barton, Heredity 43 (1979) 333–339.
date_created: 2018-12-11T12:04:33Z
date_published: 1979-12-01T00:00:00Z
date_updated: 2021-12-15T15:16:50Z
day: '01'
doi: 10.1038/hdy.1979.86
extern: '1'
intvolume: ' 43'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/hdy197986
month: '12'
oa: 1
oa_version: Published Version
page: 333 - 339
publication: Heredity
publication_identifier:
eissn:
- 1365-2540
issn:
- 0018-067X
publication_status: published
publisher: Springer Nature
publist_id: '2710'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Gene flow past a cline
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 43
year: '1979'
...
---
OA_place: publisher
OA_type: hybrid
_id: '4336'
abstract:
- lang: eng
text: "This paper investigates the dynamic behaviour of hybrid zones which are maintained
by a balance between dispersal and selection against hybrids. In the first section
it is shown that a hybrid zone involving a single locus can move in response to
a selective imbalance between the two homozygotes, and also to variation in population
density and dispersal rate. It can be trapped by natural barriers, and so an allele
which is selected against when rare cannot advance, even if it is advantageous
when common. The continuous model used in deriving these results is shown to be
a good approximation to the stepping-stone model, provided that the cline contains
several demes.\r\n\r\nThe effect of stochastic forces on multi-locus hybrid zones
is then considered. An expression giving the shift in position after an arbitrary
perturbation in gamete frequency is derived. Using this formula, it is found that
sampling drift is negligible unless the zone includes few organisms and involves
few loci. Random variations in population structure are the dominant force, and
could allow considerable movement in an even environment. However, natural barriers
can still trap hybrid zones, and so it is likely that they will remain roughly
where they first formed."
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Barton NH. The dynamics of hybrid zones. Heredity. 1979;43(3):341-359.
doi:10.1038/hdy.1979.87
apa: Barton, N. H. (1979). The dynamics of hybrid zones. Heredity. Springer
Nature. https://doi.org/10.1038/hdy.1979.87
chicago: Barton, Nicholas H. “The Dynamics of Hybrid Zones.” Heredity. Springer
Nature, 1979. https://doi.org/10.1038/hdy.1979.87.
ieee: N. H. Barton, “The dynamics of hybrid zones,” Heredity, vol. 43, no.
3. Springer Nature, pp. 341–359, 1979.
ista: Barton NH. 1979. The dynamics of hybrid zones. Heredity. 43(3), 341–359.
mla: Barton, Nicholas H. “The Dynamics of Hybrid Zones.” Heredity, vol. 43,
no. 3, Springer Nature, 1979, pp. 341–59, doi:10.1038/hdy.1979.87.
short: N.H. Barton, Heredity 43 (1979) 341–359.
date_created: 2018-12-11T12:08:19Z
date_published: 1979-12-01T00:00:00Z
date_updated: 2024-10-16T14:33:08Z
day: '01'
doi: 10.1038/hdy.1979.87
extern: '1'
intvolume: ' 43'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/hdy197987
month: '12'
oa: 1
oa_version: Published Version
page: 341 - 359
publication: Heredity
publication_identifier:
eissn:
- 1365-2540
issn:
- 0018-067X
publication_status: published
publisher: Springer Nature
publist_id: '1696'
quality_controlled: '1'
status: public
title: The dynamics of hybrid zones
type: journal_article
user_id: 0043cee0-e5fc-11ee-9736-f83bc23afbf0
volume: 43
year: '1979'
...
---
_id: '4337'
article_processing_charge: No
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Barton NH. A hybrid zone in the alpine grasshopper Podisma pedestris. 1979.
apa: Barton, N. H. (1979). A hybrid zone in the alpine grasshopper Podisma pedestris.
University of East Anglia.
chicago: Barton, Nicholas H. “A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris.”
University of East Anglia, 1979.
ieee: N. H. Barton, “A hybrid zone in the alpine grasshopper Podisma pedestris,”
University of East Anglia, 1979.
ista: Barton NH. 1979. A hybrid zone in the alpine grasshopper Podisma pedestris.
University of East Anglia.
mla: Barton, Nicholas H. A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris.
University of East Anglia, 1979.
short: N.H. Barton, A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris, University
of East Anglia, 1979.
date_created: 2018-12-11T12:08:20Z
date_published: 1979-01-01T00:00:00Z
date_updated: 2025-06-26T08:57:22Z
day: '01'
degree_awarded: PhD
extern: '1'
language:
- iso: eng
month: '01'
oa_version: None
publication_status: published
publisher: University of East Anglia
publist_id: '1694'
status: public
title: A hybrid zone in the alpine grasshopper Podisma pedestris
type: dissertation
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '1979'
...