Genetic Differences among Host-Associated Populations of Water Mites (Acari: Unionicolidae: Unionicola): Allozyme Variation Supports Morphological Differentiation

2000 ◽  
Vol 86 (5) ◽  
pp. 1008 ◽  
Author(s):  
Dale D. Edwards ◽  
Mark Labhart
Keyword(s):  
Morphological Differentiation ◽  
Allozyme Variation ◽  
Genetic Differences ◽  
Water Mites

Population genetic structure in duckweed (Lemna minor, Lemnaceae)

1996 ◽  
Vol 74 (2) ◽  
pp. 222-230 ◽  
Author(s):  
Christopher T. Cole ◽  
Martin I. Voskuil
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Population Genetic ◽  
Lemna Minor ◽  
Vegetative Reproduction ◽  
Low Frequency ◽  
Morphological Differentiation ◽  
Genotypic Diversity ◽  
Allozyme Variation ◽  
Low Levels

Allozyme variation in 11 Minnesota populations of Lemna minor L. was studied, using 11 enzyme systems, resolving 16 putative loci from 285 plants. Significant deviations from Hardy–Weinberg frequencies occurred in several populations that had excesses of heterozygotes at several loci. While genotypic diversity and evenness measures are similar to other vegetatively reproducing plants (D = 0.541, E = 0.607), very few multilocus genotypes per population were found (mean = 4.0). Substantial population structure was evident (FST = 0.407), apparently reflecting low levels of gene flow (Nm = 0.30) despite the capacity of this species for dispersal of plantlets. This low level of gene flow and apparent low frequency of sexual reproduction has produced substantial levels of genetic divergence among populations, despite an absence of morphological differentiation. Keywords: allozymes, genetic structure, hydrophily, Lemna, vegetative dispersal, vegetative reproduction.

Environmental and Genetic Contributions to Morphological Differentiation in Ciscoes (Coregoninae) of the Great Lakes

1981 ◽  
Vol 38 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Thomas N. Todd ◽  
Gerald R. Smith ◽  
Louella E. Cable
Keyword(s):  
Great Lakes ◽  
Environmental Effects ◽  
Management Strategies ◽  
Morphological Differentiation ◽  
Single Species ◽  
Genetic Differences ◽  
Morphological Differences ◽  
Genetic Contributions

Laboratory-produced progeny of Coregonus alpenae, C. zenithicus, C. hoyi, and C. kiyi and their wild parents were used to examine the contributions of genotype and environment to morphology. Morphological differences between parents and offspring were generally greater than those between species, indicating strong environmental effects. The phenotypic effects on most characters can probably be attributed to different developmental temperatures and perhaps to stresses in the hatchery not encountered in the Great Lakes. Genetic differences were inferred from morphological differences between offspring of different species raised under identical conditions. Genetic differences were demonstrated between C. hoyi and C. kiyi but not between C. alpenae and C. zenithicus which suggested that our samples of C. alpenae and C. zenithicus represented only a single species. The presence of unique stocks of coregonines in the Great Lakes, as well as of several species, suggests that management strategies should focus on both levels of diversity.Key words: Salmonidae, Coregoninae, Coregonus, morphology, Great Lakes, development, stocks

ALLOZYME VARIATION IN HALICTUS RUBICUNDUS (CHRIST): A PRIMITIVELY SOCIAL HALICTINE BEE (HYMENOPTERA: HALICTIDAE)

1989 ◽  
Vol 121 (12) ◽  
pp. 1049-1057 ◽  
Author(s):  
Laurence Packer ◽  
Robin E. Owen
Keyword(s):  
High Frequency ◽  
Allozyme Variation ◽  
Genetic Differences ◽  
Electrophoretic Variation ◽  
Expected Heterozygosity ◽  
Eusocial Bees ◽  
Primitively Eusocial

AbstractHalictus rubicundus (Christ) is a primitively eusocial halictine bee. Studies of electrophoretic variation at 48 loci for 37 enzymes with an average of 38 bees per locus provided an expected heterozygosity of 0.038 ± 0.018 for a population from Vancouver, B.C. This value is well within the range found for other primitively eusocial bees and wasps. Comparisons of allozyme mobilities made among samples from France, Alberta, and Vancouver indicated that there are some genetic differences, with the French sample appearing particularly distinct. The loci Diaph, G3pdh-1, and 6Pgd-1 had variants with both alleles at high frequency within the Vancouver population. These loci could provide good estimates of the average relatedness between nest mates.

Genetic differences between humans and chimps and among humans.

1979 ◽  
Vol 34 (2) ◽  
pp. 188-190 ◽  
Author(s):  
Robert Plomin ◽  
A. R. Kuse
Keyword(s):  
Genetic Differences

GENETIC DIFFERENCES?

1971 ◽  
Vol 16 (12) ◽  
pp. 812-813
Author(s):  
LEONARD HERSHER
Keyword(s):  
Genetic Differences

P4069 Genetic differences in a Colombian Paso horse breed by gait selection

2016 ◽  
Vol 94 (suppl_4) ◽  
pp. 113-114 ◽  
Author(s):  
M. A. Novoa ◽  
L. F. García
Keyword(s):  
Genetic Differences ◽  
Horse Breed

Allozyme Variation and Population Substructuring in the Caucasian Ground Lizards Lacerta derjugini and Lacerta praticola

2011 ◽  
Vol 4 (2) ◽  
pp. 115-119 ◽  
Author(s):  
Ross D. MacCulloch ◽  
Ilya S. Darevsky ◽  
Robert W. Murphy ◽  
Jinzhong Fu
Keyword(s):  
Genetic Diversity ◽  
Allozyme Variation ◽  
Close Proximity ◽  
Geographic Separation ◽  
Population Substructuring ◽  
Allozyme Loci ◽  
Two Populations

Genetic diversity at 35 allozyme loci was surveyed in Lacerta derjugini (3 populations) and L. praticola (2 populations). Indices of variability were consistent with those found in other Caucasian Lacerta. There was little genetic substructuring between two populations of L. praticola despite considerable geographic separation. Conversely, populations of L. derjugini in close proximity to one another exhibited considerable substructuring.

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