Genetical Research
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Linkage disequilibrium mapping of the bolting gene in sea beet using AFLP markers
Genetical Research - Tập 77 Số 1 - Trang 61-66 - 2001
The possibility of using linkage disequilibrium mapping in natural plant
populations was assessed. In studying linkage disequilibrium among 137 mapped
AFLP markers in four populations of sea beet (Beta vulgaris ssp. maritima (L.)
Arcang.) it was shown that tightly linked loci could be detected by screening
for associations. It was hypothesized that the short distances spanned by
linkage disequilib...
A world-wide survey of genetic variation in the yellow fever mosquito,Aedes aegypti
Genetical Research - Tập 34 Số 3 - Trang 215-229 - 1979
SUMMARYThirty-four populations ofAedes aegyptirepresenting the world-wide
distribution of the species, were analysed for genetic variation at 19–22
isozyme loci. The species has an average expected heterozygosity of 0·129±0·045
based on 19 loci analysed in every population. Based on this genetic
information, two major groups can be defined: the dark, often sylvan, African
subspeciesformosusand the...
The use ofp-fluorophenylalanine with ‘master strains’ ofAspergillus nidulansfor assigning genes to linkage groups
Genetical Research - Tập 6 Số 3 - Trang 352-359 - 1965
Four ‘master’ strains ofAspergillus nidulans, three of which are marked on each
of the eight chromosomes, are used for assigning genes of unknown location to
linkage groups. In this technique a heterozygous diploid is synthesized between
one ‘master’ strain and a strain carrying an unlocated marker. This diploid is
haploidized by growth onp-fluorophenylalanine, and the haploids thus obtained
are c...
Mitotic non-conformity inAspergillus: successive and transposable genetic changes
Genetical Research - Tập 16 Số 1 - Trang 79-93 - 1970
SUMMARYStrains ofAspergillus nidulanswith, a duplicate chromosome segment are
mitotically unstable; in addition to phenotypically improved variants, arising
following deletions in either duplicate segment, they give morphologically
deteriorated types, some with, enhanced stability. In one isolate, deterioration
and increased instability were determined by mutation in a duplicate segment; a
more st...
The production and replica plating of micro-colonies ofAspergillus nidulans
Genetical Research - Tập 4 Số 2 - Trang 320-322 - 1963
The two-way selection of mutants and revertants in respect of acetate utilization and resistance to fluoro-acetate in Aspergillus nidulans
Genetical Research - Tập 6 Số 3 - Trang 317-329 - 1965
An extension of two-way selection (i.e. selection of mutant from wild-type and
vice versa within the same locus and with the same efficiency) to four different
mutational or segregational situations was made possible by using acetate,
fluoro-acetate and other substances related to their metabolism.Two types of
mutants resistant to fluoro-acetate were selected, the first of which
(designated fac) c...
The genetics of tasting in mice: V. Glycine and cycloheximide
Genetical Research - Tập 52 Số 3 - Trang 207-212 - 1988
SummaryGlycine tastes both bitter and sweet to mice but there are differences
between strains in their ability to detect each taste. With respect to the
bitter taste, fifteen strains were classified as tasters and twelve strains as
non-tasters. The difference is due to a single gene, Glb (glycine bitterness).
Cycloheximide tastes bitter to all mice at a concentration of 8 μM, but strain
difference...
Non-stringent tissue-source requirements for BMP ligand expression in regulation of body size inCaenorhabditis elegans
Genetical Research - Tập 93 Số 6 - Trang 427-432 - 2011
SummaryInCaenorhabditis elegans, the Bone Morphogenetic Protein (BMP)-related
ligand Dpp- and BMP-like-1 (DBL-1) regulates body size by promoting the larval
and adult growth of the large epidermal syncytium hyp7 without affecting cell
division. This system provides an excellent model for dissecting the
growth-promoting activities of BMP ligands, since in this context the growth and
differentiation...
Polymorphism from environmental heterogeneity: models are only robust if the heterozygote is close in fitness to the favoured homozygote in each environment
Genetical Research - Tập 45 Số 3 - Trang 299-314 - 1985
SummaryThe lack of robustness of models of the maintenance of polymorphism in a
heterogeneous environment which has been pointed out by Maynard Smith & Hoekstra
(1980), applies also to models based on habitat selection, on temporal variation
and on density-regulated selection. Only if (partial) dominance ‘switches’
between environments such that the fitness of the heterozygote is always close
to t...
Polymorphism in a varied environment: how robust are the models?
Genetical Research - Tập 35 Số 1 - Trang 45-57 - 1980
SUMMARYThis paper shows that a number of models of the maintenance of
polymorphism in a heterogeneous environment, including those of Levene and
Dempster, can be derived from a simple assumption about the way in which the
numbers and kinds of individuals emerging from a niche depend on the number of
eggs laid in it. It is shown that for such models, unless selective advantages
per locus are large,...
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