Genetic variability in Gibberella fujikuroi and some related species of the genus Fusarium based on random amplification of polymorphic DNA (RAPD)

1995 ◽  
Vol 27 (6) ◽  
pp. 528-535 ◽  
Author(s):  
K. Voigt ◽  
S. Schleier ◽  
B. Br�ckner
Keyword(s):  
Genetic Variability ◽  
Related Species ◽  
Gibberella Fujikuroi ◽  
Genus Fusarium ◽  
Random Amplification

scholarly journals Genetic variability in populations of sweet corn, common corn and teosinte

2011 ◽  
Vol 11 (1) ◽  
pp. 64-69 ◽  
Author(s):  
Cicero Almeida ◽  
Edson Perito Amorim ◽  
José Fernandes Barbosa Neto ◽  
Julio Alves Cardoso Filho ◽  
Maria Jane Cruz de Melo Sereno
Keyword(s):  
Zea Mays ◽  
Genetic Variability ◽  
Related Species ◽  
Population Genetic ◽  
Zea Mays L ◽  
Sweet Corn ◽  
High Variability ◽  
Maize Populations ◽  
Different Types ◽  
Two Populations

The maize (Zea mays L. ssp. mays) has several related species, called teosinte, which are distributed in various subspecies of Zea and other genera. Among the different types of corn, sweet corn shows a great potential for human food. This type was originated from mutations, which increased the amount of polysaccharide in the endosperm. In Brazil there are populations of sweet corn, common maize and teosinte, however, little is known about their genetic variability. Hence, the aim of this present paper was to analyze the genetic variability in two populations of sweet corn (BR 400 and BR 402), two common corn (Pampa and Suwan) and teosinte, using microsatellite markers. The results showed a low intra-population genetic variability in populations of maize, and high variability for the population of teosinte, suggesting that the maize populations may have limitations in future cycles of breeding.

GENETICS OF PHYTOPATHOGENIC FUNGI: VI. HETEROCARYONS INVOLVING GIBBERELLA FUJIKUROI AND FORMAE OF FUSARIUM OXYSPORUM

1961 ◽  
Vol 39 (4) ◽  
pp. 785-792 ◽  
Author(s):  
T. S. Dhillon ◽  
E. D. Garber ◽  
Ellen G. Wyttenbach
Keyword(s):  
Fusarium Oxysporum ◽  
Minimal Medium ◽  
Phytopathogenic Fungi ◽  
Potato Dextrose Agar ◽  
Gibberella Fujikuroi ◽  
Nutritional Requirement ◽  
Parasexual Cycle ◽  
Genus Fusarium ◽  
Component Strain ◽  
Mutant Strains

Heterocaryons involving nutritionally deficient mutant strains of Gibberella fujikuroi and mutant strains of this species and of four formae of Fusarium oxysporum were obtained. It was not possible to get heterocaryons of G. fujikuroi and F. oxysporum f. pisi until the latter mutant strain was adapted to grow on minimal medium. Spores from heterocaryons had either the genotype of only one component strain or of either component strain, depending on the heterocaryon. It was possible to alter nuclear ratios by growing certain heterocaryons on minimal medium supplemented with the compound(s) required by one or the other component strain. Sectors from certain heterocaryons grown on potato dextrose agar were homocaryotic for the nutritional requirement(s) of one component strain. Heterocaryosis as a taxonomic tool and the difficulties involved in demonstrating the parasexual cycle in the genus Fusarium are discussed.

scholarly journals Genes and smells

2011 ◽  
Vol 33 (6) ◽  
pp. 10-13 ◽  
Author(s):  
Andreas Keller
Keyword(s):  
Genetic Variability ◽  
Related Species ◽  
Odorant Receptor ◽  
Gene Duplications ◽  
Duplicated Genes ◽  
Vertebrate Species ◽  
Closely Related Species ◽  
Human Genomes ◽  
Or Genes

The recently sequenced genomes of several vertebrate species revealed large differences between the odorant receptor (OR) repertoires of even closely related species. These differences are a consequence of frequent gene duplications and subsequent mutations of duplicated genes. The same mechanisms are at work within a species, and different human genomes therefore show an unparalleled variability in the number and sequence of OR genes. Recent research has started to explore the consequences of this genetic variability for how we perceive odours.

Allozyme variation in three closely related species of Caucasian rock lizards (Lacerta)

1995 ◽  
Vol 16 (4) ◽  
pp. 331-340 ◽  
Author(s):  
Ross D. MacCulloch ◽  
F.D. Danielyan ◽  
Ilya S. Darevsky ◽  
Robert W. Murphy ◽  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Genetic Distance ◽  
Related Species ◽  
Allozyme Variation ◽  
Direct Count ◽  
Closely Related Species ◽  
Polymorphic Loci ◽  
Allozyme Loci ◽  
Insular Populations

AbstractGenetic diversity at 37 allozyme loci was surveyed from Lacerta valentini (4 populations), L. portschinskii and L. rudis (1 population each). The number of polymorphic loci ranged from 1 (L. valentini) to 11 (L. rudis). Mean heterozygosity (direct count) ranged from 0.003 (L. valentini) to 0.071 (L. rudis). Nei's (1978) genetic distance ranged from 0-0.03 among populations of L. valentini, 0.127-0.163 between L. valentini and L. rudis and 0.366-0.487 between L. portschinskii and the two other taxa. Indices of genetic variability for species having disjunct distributions were lower than in species with contiguous distributions, similar to the case of insular populations, which have lower values than do mainland populations.

scholarly journals GENETIC POLYMORPHISM AND EVOLUTION IN PARTHENOGENETIC ANIMALS. I. POLYPLOID CURCULIONIDAE

Genetics ◽  
1973 ◽  
Vol 74 (3) ◽  
pp. 489-508
Author(s):  
Esko Suomalainen ◽  
Anssi Saura
Keyword(s):  
Genetic Polymorphism ◽  
Genetic Variability ◽  
Related Species ◽  
Gel Electrophoresis ◽  
Hybrid Origin ◽  
Starch Gel Electrophoresis ◽  
Closely Related Species ◽  
Hardy Weinberg Equilibrium ◽  
Starch Gel ◽  
Different Populations

ABSTRACT The genetic variability at enzyme loci in different triploid and tetraploid parthenogenetic weevil populations has been elucidated by starch gel electrophoresis. The overall genotype of individual weevils belonging to different populations has been determined for over 25 loci. The results are compared with those obtained for diploid bisexual races of either the same or closely related species. The variation within a parthenogenetic population differs from that in diploid, sexually reproducing populations, i.e. the allele frequencies are not in a Hardy-Weinberg equilibrium. The results indicate that apomictic parthenogenetic populations can differentiate genetically. The genotypes within a population resemble each other more than genotypes belonging to different populations. It is evident that evolution still continues-even if slowed down—in parthenogenetic weevils. A comparison between the allele relationships in geographically isolated polyploid parthenogenetic populations and related diploid bisexual forms does not support the hypothetical hybrid origin of parthenogenesis and polyploidy in weevils. Parthenogenesis within a parthenogenetic weevil species is evidently monophyletic.

Genetic variability of Bacillus anthracis and related species.

1995 ◽  
Vol 33 (7) ◽  
pp. 1847-1850 ◽  
Author(s):  
L J Harrell ◽  
G L Andersen ◽  
K H Wilson
Keyword(s):  
Genetic Variability ◽  
Bacillus Anthracis ◽  
Related Species
Sign in / Sign up

Export Citation Format

Share Document