Species relationships and genetic variation in the diploid wheats (Triticum, Aegilops) as revealed by starch gel electrophoresis

1980 ◽  
Vol 136 (3-4) ◽  
pp. 247-258 ◽  
Author(s):  
Thomas Brody ◽  
Samuel Mendlinger
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Starch Gel Electrophoresis ◽  
Species Relationships ◽  
Starch Gel

Survey of the Genetic Variation Among Eastern Lake Superior Lake Trout (Salvelinus namaycush)

1981 ◽  
Vol 38 (12) ◽  
pp. 1738-1746 ◽  
Author(s):  
Terrence R. Dehring ◽  
Anne F. Brown ◽  
Charles H. Daugherty ◽  
Stevan R. Phelps
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Lake Trout ◽  
Lake Superior ◽  
Salvelinus Namaycush ◽  
Starch Gel Electrophoresis ◽  
Average Heterozygosity ◽  
Management Implications ◽  
Salmonid Species ◽  
Starch Gel

Patterns of genetic variation among lake trout (Salvelinus namaycush) of eastern Lake Superior were examined using starch gel electrophoresis. We used 484 individuals sampled from three areas, representing three morphological types (leans, humpers, and siscowets). Of 50 loci examined, 44 were monomorphic in all groups sampled. Genetic variation occurs at six loci AAT-1,2, MDH-3,4, ME-1, and SOD-1. The average heterozygosity found (H = 0.015) is low relative to other salmonid species. A significant amount of heterogeneity exists among the 10 lake trout samples. These differences are due to variation within as well as between morphological types. The significance and management implications of these data are discussed.Key words: genetic variation, lake trout, Salvelinus namaycush, Lake Superior

Genetic variation in pika populations

1977 ◽  
Vol 55 (11) ◽  
pp. 1841-1845 ◽  
Author(s):  
D. G. Glover ◽  
M. H. Smith ◽  
L. Ames ◽  
J. Joule ◽  
J. M. Dubach
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Starch Gel Electrophoresis ◽  
Genetic Loci ◽  
Starch Gel

Analysis of 26 genetic loci by horizontal starch gel electrophoresis was performed on 197 pikas from one Montana and four Colorado populations. Only four loci were polymorphic within populations and individual heterozygosity was low for a mammal [Formula: see text]. The Montana and Colorado populations were fixed for alternate allelles at three loci. Because of the insular nature of pika habitat, drift is probably important in determining low heterozygosities and genetic similarities measured between widely separated pika populations.

Inter-Species Relationships Within the Genus Oncorhynchus Based on Biochemical Systematics

1966 ◽  
Vol 23 (1) ◽  
pp. 101-107 ◽  
Author(s):  
H. Tsuyuki ◽  
E. Roberts
Keyword(s):  
Phylogenetic Relationships ◽  
Gel Electrophoresis ◽  
Plasma Proteins ◽  
Disc Electrophoresis ◽  
Starch Gel Electrophoresis ◽  
Species Relationships ◽  
Oncorhynchus Masou ◽  
Starch Gel ◽  
Specific Muscle ◽  
Species Specific

The species specific muscle myogens of Salmo gairdnerii, Oncorhynchus masou, O. masou ishikawae, O. kisutch, O. tshawytscha, O. keta, O. nerka, and O. gorbuscha are compared by starch gel electrophoresis. Plasma proteins of these same species are also examined by polyacrylamide disc electrophoresis. The range of usefulness of muscle myogens in species identification, and equally significantly, their value in establishing phylogenetic relationships of closely related groups, as the genus Oncorhynchus, are discussed. The myogen patterns of O. keta and O. gorbuscha from the Asiatic and North American coasts were found to be identical, further supporting the concept of absolute species specificity of these patterns.

Little genetic variation in the oil sardine, Sardinella longiceps Val., from the western coast of India

1994 ◽  
Vol 45 (2) ◽  
pp. 257 ◽  
Author(s):  
MR Menezes
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Western Coast ◽  
Starch Gel Electrophoresis ◽  
Marine Fish Species ◽  
Average Heterozygosity ◽  
Enzyme Gene ◽  
Starch Gel ◽  
Sardinella Longiceps ◽  
Gene Variability

Enzyme gene variability in the oil sardine, Sardinella longiceps, from three localities along the western coast of India was studied by starch-gel electrophoresis. Out of 19 loci scored, no locus was polymorphic by the 95% criterion. Seven loci were polymorphic at the P=0.99 level. The average heterozygosity ranged from 0.6% to 0.9%. These values are very low compared with those of other marine fish species.

The systematic status of the lagoon periwinkle, Littorina tenebrosa

1999 ◽  
Vol 79 (4) ◽  
pp. 653-660 ◽  
Author(s):  
Iain F. Wilson ◽  
Elizabeth M. Gosling ◽  
William Tapper
Keyword(s):  
Phylogenetic Analysis ◽  
Genetic Variation ◽  
Gene Flow ◽  
Genetic Distance ◽  
Gel Electrophoresis ◽  
Distinct Group ◽  
Starch Gel Electrophoresis ◽  
Allopatric Populations ◽  
Starch Gel ◽  
The Mean

Eight samples of Littorina tenebrosa and L. saxatilis (Mollusca: Gastropoda) from Ireland and Britain, including pairs of each form from two locations in Ireland, were screened for genetic variation at 12 polymorphic enzyme loci using starch gel electrophoresis. Levels of polymorphism and heterozygosity were similar in L. tenebrosa and L. saxatilis, apart from a sample of L. tenebrosa from Britain which was less polymorphic than the Irish samples. No alleles were found to be unique to either form. Phylogenetic analysis using UPGMA showed that L. saxatilis and L. tenebrosa populations clustered as a monophyletic group. Nevertheless, the mean genetic distance between parapatric populations of L. saxatilis and L. tenebrosa (D=0.076) was similar to the mean for allopatric populations of either species (D=0.080). This indicates that there is a barrier to gene flow between the two forms Despite this, L. tenebrosa does not merit specific status since populations of this snail do not cluster as a distinct group, separate from L. saxatilis populations.

Genotypic Diversity of Kikuyugrass (Pennisetum clandestinum) Populations in California

Weed Science ◽  
1995 ◽  
Vol 43 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Cheryl A. Wilen ◽  
Jodie S. Holt ◽  
Norman C. Ellstrand ◽  
Ruth G. Shaw
Keyword(s):  
Genetic Variation ◽  
Genetic Variability ◽  
Plant Species ◽  
Gel Electrophoresis ◽  
Genotypic Diversity ◽  
Clonal Reproduction ◽  
Golf Course ◽  
Starch Gel Electrophoresis ◽  
Geographic Locations ◽  
Starch Gel

Using starch gel electrophoresis, we examined the genetic variability of kikuyugrass collected from three golf course sites within its geographical range in California. These experiments were conducted to determine the method of spread of kikuyugrass in areas where it is considered invasive. Samples from roughs and fairways of each of these locations were compared. of the 354 plants examined, 12 different genotypes were identified by isozyme analysis, and only three of the nine putative loci varied among the genotypes. Two genotypes, representing 73% of the plants examined, were found at all three geographic locations. Our results imply that under common golf course practices, kikuyugrass is maintained by clonal reproduction. We conclude that low genetic variation does not preclude a plant species from being an aggressive invader.

scholarly journals Biochemical variation in purebred and crossbred strains of domestic rabbits (Oryctolagus cuniculus L.)

1986 ◽  
Vol 48 (1) ◽  
pp. 27-34 ◽  
Author(s):  
G. B. Hartl ◽  
H. Höger
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Oryctolagus Cuniculus ◽  
Mammalian Species ◽  
Starch Gel Electrophoresis ◽  
Starch Gel ◽  
Biochemical Variation ◽  
Domestic Rabbits ◽  
Different Strains ◽  
Different Tissues

SummaryGenetic variation in 40 domestic rabbits (Oryctolagus cuniculus) from eight different strains was investigated by horizontal starch gel electrophoresis. Twenty nine enzyme systems were examined in different tissues, 10 isoenzymes were found to be polymorphic. Indices of genetic variation show values comparable to those found in most other mammalian species. Thus the unusually high values reported previously by other authors may be due to a limited and not randomly chosen set of enzymes studied.

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