Isozyme variability in species of the genusDrosophila. V. ejaculatory bulb esterases inDrosophila phylogeny

1968 ◽  
Vol 2 (1) ◽  
pp. 1-18 ◽  
Author(s):  
F. M. Johnson ◽  
S. Bealle
Keyword(s):  
Isozyme Variability ◽  
Ejaculatory Bulb

Role of the ejaculatory bulb in biosynthesis of the male pheromonecis-vaccenyl acetate inDrosophila melanogaster

2007 ◽  
Vol 2 (2) ◽  
pp. 89-99 ◽  
Author(s):  
Gaëlle GUIRAUDIE-CAPRAZ ◽  
Dang Ba PHO ◽  
Jean-Marc JALLON
Keyword(s):  
Ejaculatory Bulb

Isozyme Variability in Mature Seeds of U. S. Peanut Cultivars and Collections1

1990 ◽  
Vol 17 (2) ◽  
pp. 72-75 ◽  
Author(s):  
Uta Grieshammer ◽  
J. C. Wynne
Keyword(s):  
Starch Gel Electrophoresis ◽  
Glutamate Oxaloacetate Transaminase ◽  
Banding Patterns ◽  
Taxonomic Relatedness ◽  
Arachis Hypogaea L ◽  
Cultivated Peanut ◽  
Starch Gel ◽  
Isozyme Variability ◽  
Peanut Cultivars ◽  
Mature Seeds

Abstract The mature seeds of 61 U. S. peanut (Arachis hypogaea L.) cultivars, one breeding and six exotic peanut lines representing three botanical types were surveyed for 25 enzyme systems using horizontal starch gel electrophoresis. The genotypes assayed showed no variation for most of the enzymes. For catalase and malate dehydrogenase, variability was present but not reproducibly within genotypes. Only three enzymes—glutamate oxaloacetate transaminase (GOT), isocitrate dehydrogenase (IDH), and phosphohexose isomerase (PHI)—were consistently polymorphic. Each of the three enzymes displayed two different banding patterns. With three exceptions, the distribution of the zymograms for GOT and PHI reflected the taxonomic relatedness of Spanish and Valencia botanical type peanuts which are members of the subspecies A. hypogaea L. ssp. fastigiata Waldron when compared with Virginia botanical varieties which belong to the subspecies hypogaea. IDH showed only one banding pattern for the Spanish- and valencia-type peanuts (one exception), whereas the virginia-type cultivars varied for this enzyme reflecting the narrow genetic base of most Spanish cultivars and the broader germplasm base used for the development of Virginia cultivars. The limited amount of variability appears to restrict the applicability of isozymes as genetic markers in the cultivated peanut.

Isozyme Variability inAlternaria solaniandA. alternata

1992 ◽  
Vol 82 (11) ◽  
pp. 1343 ◽  
Author(s):  
D. M. Petrunak
Keyword(s):  
Isozyme Variability

scholarly journals Isozyme variability among isolates of Phaeoisariopsis griseola in southern Africa

1996 ◽  
Vol 45 (2) ◽  
pp. 344-349 ◽  
Author(s):  
W. H. P. BOSHOFF ◽  
W. J. SWART ◽  
Z. A. PRETORIUS ◽  
M. M. LIEBENBERG ◽  
P. W. CROUS
Keyword(s):  
Southern Africa ◽  
Phaeoisariopsis Griseola ◽  
Isozyme Variability

Isozyme Variability in Field Populations of Phytophthora cinnamomi in Australia

1988 ◽  
Vol 36 (3) ◽  
pp. 355 ◽  
Author(s):  
KM Old ◽  
MJ Dudzinski ◽  
JC Bell
Keyword(s):  
Sexual Reproduction ◽  
Phytophthora Cinnamomi ◽  
Soil Samples ◽  
Mating Types ◽  
South Eastern ◽  
Enzyme Loci ◽  
Eastern Australia ◽  
Wide Range ◽  
Isozyme Variability ◽  
South Eastern Australia

Isozyme characteristics of 280 isolates from populations of Phytophthora cinnamomi in native veg- etation in six locations in south-eastern Australia were examined at 19 enzyme loci. No new enzyme genotypic arrays were identified as compared with earlier samplings. This work indicates that the low variability for P. cinnamomi in Australia obtained in earlier work, from separate isolates in a wide range of locations, is paralleled in detailed population samples in south-eastern Australia. At one location, A1 and A2 mating types coexisted in soil samples. The lack of recombinants in these population samples suggests an absence of sexual reproduction in the field.

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