Use of Gene Substitution Values to Quantify Partial Dominance in Low Palmitic Acid Soybean

Crop Science ◽  
1998 ◽  
Vol 38 (6) ◽  
pp. 1437-1441 ◽  
Author(s):  
Duška Stijšin ◽  
Gary R. Ablett ◽  
Bruce M. Luzzi ◽  
Jack W. Tanner
Keyword(s):  
Palmitic Acid ◽  
Partial Dominance ◽  
Gene Substitution

An efficient method for precise gene substitution in the AcMNPV genome by homologous recombination in E. coli

2003 ◽  
Vol 113 (2) ◽  
pp. 95-101 ◽  
Author(s):  
Wuwei Wu ◽  
Jinwen Wang ◽  
Riqiang Deng ◽  
Xunzhang Wang ◽  
XiongLei He ◽  
...  
Keyword(s):  
Homologous Recombination ◽  
Efficient Method ◽  
Gene Substitution ◽  
E Coli

A CYTOGENETIC STUDY OF OFFTYPES IN A WINTER WHEAT, DAWSON'S GOLDEN CHAFF, INCLUDING A WHITE CHAFF MUTANT

1943 ◽  
Vol 21c (9) ◽  
pp. 257-264 ◽  
Author(s):  
R. Merton Love
Keyword(s):  
Winter Wheat ◽  
Cytogenetic Study ◽  
Gene Substitution ◽  
Domestic Species

A cytologically aberrant mutant, found in Dawson's Golden Chaff winter wheat, had white glumes that were significantly longer than normal and the plant was significantly shorter than normal. It was characterized by a telokinetic pair of chromosomes. Evidence from two other lines has shown that such chromosomes arise from fragmentation of either primary or secondary univalents.The results, together with those obtained from speltoid and fatuoid studies, indicate that domestic species and varieties of cereals differ from their prototypes, not necessarily through gene substitution, but through the addition of genes that mask the effect of primitive genes still a part of the complex or through gene substitution in a chromosome other than that carrying the primitive gene in question.

scholarly journals Hitchhiker’s guide to genetic diversity in socially structured populations

2012 ◽  
Vol 58 (2) ◽  
pp. 287-297 ◽  
Author(s):  
L. S. Premo
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Critical Review ◽  
Structured Populations ◽  
Genetic Hitchhiking ◽  
Gene Substitution ◽  
Dna Diversity ◽  
Low Levels ◽  
Cultural Traits

Abstract When selection increases the frequency of a beneficial gene substitution it can also increase the frequencies of linked neutral alleles through a process called genetic hitchhiking. A model built to investigate reduced genetic diversity in Pleistocene hominins shows that genetic hitchhiking can have a strong effect on neutral diversity in the presence of culturally mediated migration. Under conditions in which genetic and cultural variants are transmitted symmetrically, neutral genes may also hitchhike to higher frequencies on the coattails of adaptive cultural traits through a process called cultural hitchhiking. Cultural hitchhiking has been proposed to explain why some species of matrilineal whales display relatively low levels of mitochondrial DNA diversity, and it may be applicable to humans as well. This paper provides a critical review of recent models of both types of hitchhiking in socially structured populations. The models’ assumptions and predictions are compared and discussed in the hope that studies of reduced genetic diversity in humans might improve our understanding of reduced genetic diversity in other species, and vice versa [Current Zoology 58 (1): 287–297, 2012].

scholarly journals GENETIC VARIABILITY AND RATE OF GENE SUBSTITUTION IN A FINITE POPULATION UNDER MUTATION AND FLUCTUATING SELECTION

Genetics ◽  
1981 ◽  
Vol 98 (2) ◽  
pp. 427-440
Author(s):  
Naoyuki Takahata
Keyword(s):  
Genetic Variability ◽  
Finite Population ◽  
Evolutionary Rate ◽  
Random Genetic Drift ◽  
Fluctuating Selection ◽  
Gene Substitution ◽  
Temporal And Spatial ◽  
Selection Intensities ◽  
Neutral Mutations ◽  
Temporal And Spatial Heterogeneity

ABSTRACT By using a numerical method of solving stochastic difference equations, the level of genetic variability maintained in a finite population and the rate of gene substitution under several models of fluctuating selection intensities were studied. It is shown that mutation and random genetic drift both play an important role in determining genetic variability and the rate of gene substitution. Compared with the case of neutral mutations, the fluctuation of selection intensity caused by temporal and spatial heterogeneity of environments generally increases the rate of gene substitution, but the level of genetic variability may be increased or decreased, depending upon the model and the parameters used. Although such a type of selection per se can not be ruled out, when mutation is taken into account, it is difficult to explain both the observed amount of genetic variability and the rough constancy of evolutionary rate within a framework of fluctuating selection models.

Assessment of pleiotropic effects of a gene substitution in pea by two-dimensional polyacrylamide gel electrophoresis.

Genetics ◽  
1988 ◽  
Vol 119 (3) ◽  
pp. 705-710
Author(s):  
L D Gottlieb ◽  
D de Vienne
Keyword(s):  
Gel Electrophoresis ◽  
Single Gene ◽  
Polyacrylamide Gel Electrophoresis ◽  
Polyacrylamide Gel ◽  
Pleiotropic Effects ◽  
Two Dimensional ◽  
Near Isogenic Lines ◽  
Gene Substitution ◽  
Isogenic Lines ◽  
The Many

Abstract We examined, by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE), near-isogenic lines of the r-gene in pea (Pisum sativum) which determines round (RR) vs. wrinkled (rr) seed. The study was undertaken to assess the number of protein changes resulting from a single gene substitution as a means of quantifying pleiotropic effects. A total of 636 to 770 resolvable polypeptides were identical in all respects between RR and rr for roots, shoots, leaflets, stipules, young ovaries, and young embryos. A single difference between the lines became evident about 21-23 days after anthesis in the embryos. Mature seeds of the two lines showed 62 spot differences in addition to differences in four clusters of spots, representing about 10% of the total number of spots visible on the gels. The protein differences are presumably involved in the many known physiological differences of the two seed types. 2-D PAGE analyses of near-isogenic lines are likely to be valuable in a number of quantitative and developmental genetic contexts.

Sign in / Sign up

Export Citation Format

Share Document