Emigration response behavior: III. Genetic variability in a natural population ofDrosophila busckii

1986 ◽  
Vol 16 (5) ◽  
pp. 543-551 ◽  
Author(s):  
Robert F. Rockwell ◽  
Louis Levine
Keyword(s):  
Genetic Variability ◽  
Natural Population ◽  
Response Behavior

scholarly journals Allozyme pattern for new record of Craspedacusta sowerbii in Serbia

2004 ◽  
pp. 15-19 ◽  
Author(s):  
Jasmina Ludoski ◽  
Vesna Milankov ◽  
Predrag Radisic
Keyword(s):  
Genetic Variability ◽  
Natural Population ◽  
Gel Electrophoresis ◽  
New Record ◽  
Polyacrylamide Gel Electrophoresis ◽  
Polyacrylamide Gel ◽  
Serbia And Montenegro ◽  
Enzyme Loci ◽  
First Time

Cosmopolitan freshwater jellyfish Craspedacusta sowerbii L a n k e s t e r 1880 (Cnidaria, Hydrozoa) was recorded for the first time in the lake Velika peskara near Zrenjanin (Serbia and Montenegro) in summer 1998. A natural population of C. sowerbii from the lake Velika peskara was analyzed for genetic variability at 9 enzyme loci (Gpi, Hk, Idh-1, Idh-2, Me, Mdh-1 Mdh-2, Pgm and Sod) by polyacrylamide gel electrophoresis. A zymogram indicated that population was monomorphic at all analyzed loci.

Genetic variability of sexual behavior in a natural population ofDrosophila melanogaster

1988 ◽  
Vol 18 (3) ◽  
pp. 389-403 ◽  
Author(s):  
Michel Veuille ◽  
Suzanne Mazeau
Keyword(s):  
Sexual Behavior ◽  
Genetic Variability ◽  
Natural Population

scholarly journals GENETIC ANALYSIS OF NATURAL POPULATIONS OF DROSOPHILA MELANOGASTER IN JAPAN. III. GENETIC VARIABILITY OF INDUCING FACTORS OF AMYLASE AND FITNESS

Genetics ◽  
1984 ◽  
Vol 108 (1) ◽  
pp. 223-235
Author(s):  
Tsuneyuki Yamazaki ◽  
Yoshinori Matsuo
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Variability ◽  
Genetic Analysis ◽  
Natural Population ◽  
Specific Activity ◽  
Natural Populations ◽  
Isogenic Line ◽  
Normal Medium ◽  
Isogenic Lines ◽  
Inducing Factors

ABSTRACT "Inducibility" of amylase in Drosophila melanogaster was defined and investigated in a natural population from Japan. Inducibility represents the effects of factors remote from the structural gene that control the amount of enzyme produced. Inducibility of an isogenic line is measured as the ratio of the enzyme's specific activity in two different inducing environments. There was considerable genetic variability with respect to inducibility of amylase in 44 isogenic lines derived from a natural population of D. melanogaster . Net fitness and its components in these isogenic lines were also measured. The results indicated that, although the inducibility of the enzyme was positively correlated with the net fitness (rg = 0.63 ± 0.2), the enzyme activities in the normal medium were not (rg = 0.12 ± 0.37). The analysis of the data shows that the differences in inducing factors are mainly responsible for the differences in the fitness of lines and are the genetic materials for the adaptive evolution of organisms.

scholarly journals Genetic variability of sexual size dimorphism in a natural population ofDrosophila melanogaster: An isofemale-line approach

2003 ◽  
Vol 82 (3) ◽  
pp. 79-88 ◽  
Author(s):  
Jean R. David ◽  
Patricia Gibert ◽  
Sandrine Mignon-Grasteau ◽  
HÉlÈne Legout ◽  
Georges PÉtavy ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Natural Population ◽  
Sexual Size Dimorphism ◽  
Isofemale Line ◽  
Size Dimorphism

Positive First or Negative First?

Methodology ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 118-127 ◽  
Author(s):  
Dagmar Krebs ◽  
Juergen H.P. Hoffmeyer-Zlotnik
Keyword(s):  
Job Characteristics ◽  
Two Dimensions ◽  
Response Behavior ◽  
Point Scale ◽  
Response Scale ◽  
Job Motivation ◽  
Ballot Design ◽  
Subjective Importance ◽  
Scale Format ◽  
Scale Types

To examine whether starting a response scale with the positive or the negative categories affects response behavior, a split-ballot design using reverse forms of an 8-point scale assessing the subjective importance of job characteristics was used. Response behavior varied according to the scale format employed. Responses were more positive on the scale starting with the category “very important” (split 2). By contrast, the scale starting with the category “not at all important” (split 1) did not elicit more negative responses, but rather less positive ones. However, differences in response behavior did not systematically reflect the direction of the respective scales. Starting with the differences between the two split versions, the factorial structure of indicators assessing two dimensions of job motivation was tested for each scale type separately and then for both scale types simultaneously. Finally, models placing increasingly severe equality constraints on both scale types were tested. The paper concludes with a discussion of the results and desiderata for further research.

On the occurrence of an additional diploid taxon —Withania obtusifolia TÄCKH. (Solanaceae) — from the natural population of South India

1999 ◽  
Vol 110 (5-6) ◽  
pp. 419-422 ◽  
Author(s):  
G. Thirupur Sundari ◽  
S. Sudhakaran ◽  
A. Ganapathi
Keyword(s):  
Natural Population ◽  
South India ◽  
Diploid Taxon
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