Qualitative and quantitative variation of tRNA in certain invertebrates

1989 ◽  
Vol 14 (2) ◽  
pp. 153-162 ◽  
Author(s):  
P. Sivaram ◽  
R. Mayasundari
Keyword(s):  
Quantitative Variation ◽  
Qualitative And Quantitative

Qualitative and Quantitative Variation of Net Plankton of Craighead Lake

1972 ◽  
Vol 17 (3) ◽  
pp. 239 ◽  
Author(s):  
Jimmy H. Nelson ◽  
George L. Harp
Keyword(s):  
Quantitative Variation ◽  
Qualitative And Quantitative

Esterase variation and squash induction in B-type Bemisia tabaci (Homoptera: Aleyrodidae)

1995 ◽  
Vol 85 (2) ◽  
pp. 175-179 ◽  
Author(s):  
Frank J. Byrne ◽  
Ian D. Bedford ◽  
Alan L. Devonshire ◽  
Peter G. Markham
Keyword(s):  
Bemisia Tabaci ◽  
Gel Electrophoresis ◽  
Null Allele ◽  
Polyacrylamide Gel Electrophoresis ◽  
Polyacrylamide Gel ◽  
Quantitative Variation ◽  
Physiological Disorder ◽  
Qualitative And Quantitative ◽  
Type Pattern ◽  
Type Strains

AbstractPolyacrylamide gel electrophoresis was used to study esterase variation in a population of B-type Bemisia tabaci (Gennadius). A total of six esterases was identified within an overall B-type pattern. However, both qualitative and quantitative variation in some of these esterases gave three clearly defined phenotypes. One of these lacked esterase E0.14 which until now has been the key band used to classify B-type strains electrophoretically. A strain homozygous for the E0.14 null allele (B-Null) retained the ability to induce squash silverleaf, a plant physiological disorder which hitherto has only ever been associated with whitefly strains possessing this band.

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