Variation of karyotype composition and genome size in some muricid gastropods from the Northern Hemisphere
Variation of karyotype composition and genome size in some muricid gastropods from the Northern Hemisphere
Members of the Muricidae in the Northern Hemisphere show striking variation in chromosome number. The majority of the species examined to date have chromosome numbers in the range 2n &equals 60-70, while the Atlantic dog-whelk, Nucella lapillus is unique in having a Robertsonian polymorphism with 2n values in the range 26–36, and Ocinebrina aciculata; is newly recorded here as 2n = 86. The karyotype composition and genome size of eight muricid species from the N Atlantic and NE Pacific are described and compared. These results are discussed with reference to the evolution and biogeography of the family, and differences in the proportions of heterochromatin and packing ratios of the metaphase chromosomes. Evolution in N. lapillus, the derived form within the group, appears to have involved a reduction in chromosome number and haploid chromosome length, but an increase in both genome size and packing ratio.
chemical intolerance, environment, environmental intolerance, hypersensitivity, MCS, multiple chemical sensitivity, olfaction, unexplained symptoms
389-398
Pascoe, P.L.
e1298a20-bb19-4db6-85f9-fa264b451a64
Jha, A.N.
8dfb6e9d-5cb0-4b56-9b7a-9d3df13c2231
Dixon, D.R.
a4d1e811-a613-4e01-8d2b-1b99b491cf0c
2004
Pascoe, P.L.
e1298a20-bb19-4db6-85f9-fa264b451a64
Jha, A.N.
8dfb6e9d-5cb0-4b56-9b7a-9d3df13c2231
Dixon, D.R.
a4d1e811-a613-4e01-8d2b-1b99b491cf0c
Pascoe, P.L., Jha, A.N. and Dixon, D.R.
(2004)
Variation of karyotype composition and genome size in some muricid gastropods from the Northern Hemisphere.
Journal of Molluscan Studies, 70 (4), .
Abstract
Members of the Muricidae in the Northern Hemisphere show striking variation in chromosome number. The majority of the species examined to date have chromosome numbers in the range 2n &equals 60-70, while the Atlantic dog-whelk, Nucella lapillus is unique in having a Robertsonian polymorphism with 2n values in the range 26–36, and Ocinebrina aciculata; is newly recorded here as 2n = 86. The karyotype composition and genome size of eight muricid species from the N Atlantic and NE Pacific are described and compared. These results are discussed with reference to the evolution and biogeography of the family, and differences in the proportions of heterochromatin and packing ratios of the metaphase chromosomes. Evolution in N. lapillus, the derived form within the group, appears to have involved a reduction in chromosome number and haploid chromosome length, but an increase in both genome size and packing ratio.
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Published date: 2004
Keywords:
chemical intolerance, environment, environmental intolerance, hypersensitivity, MCS, multiple chemical sensitivity, olfaction, unexplained symptoms
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Local EPrints ID: 9900
URI: http://eprints.soton.ac.uk/id/eprint/9900
ISSN: 0260-1230
PURE UUID: 11851181-2535-45d3-8ea0-c896aa994891
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Date deposited: 14 Oct 2004
Last modified: 08 Jan 2022 06:43
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Author:
P.L. Pascoe
Author:
A.N. Jha
Author:
D.R. Dixon
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