Hybridization is frequent in many organismal groups, but its role in adaptation is poorly understood. In sunflowers, species found in the most extreme habitats are ancient hybrids, and new gene combinations generated by hybridization are speculated to have contributed to ecological divergence. This possibility was tested through phenotypic and genomic comparisons of ancient and synthetic hybrid...

The objective of the present study was to correlate the genetic distances (GD) of single cross hybrids with yield, heterosis and specific combining ability (SCA) in the double cross hybrid synthesis. For this, 10 single cross commercial hybrids were used from different companies, and all the possible double hybrids were synthesized by a complete dialell. The hybrids were assessed in 15 location...

We read with interest the article by Byrd et al’ concerning tuberculosis in Oriental immigrants. Although the authors correctly point out that immigrants from Asia do have higher rates of drug resistance than the indigenous US population, there are several statements in that article which we feel deserve comment and clarification. In the ongoing US Public Health Service primary drug resistance ...

A novel approach was used to develop and validate a bioanalytical RP-HPLC method for the simultaneous estimation of Paracetamol and Cefixime in rabbit plasma using Cefaclor as internal standard. Evaluation of the content of drugs were done by employing a mixture of Phosphate buffer (pH 6.4) and Acetonitrile (80:20, v/v) as the mobile phase and measure the absorbance at 245 nm for Paracetamol an...

We read with interest the article by Byrd et al’ concerning tuberculosis in Oriental immigrants. Although the authors correctly point out that immigrants from Asia do have higher rates of drug resistance than the indigenous US population, there are several statements in that article which we feel deserve comment and clarification. In the ongoing US Public Health Service primary drug resistance ...

We read with interest the article by Byrd et al’ concerning tuberculosis in Oriental immigrants. Although the authors correctly point out that immigrants from Asia do have higher rates of drug resistance than the indigenous US population, there are several statements in that article which we feel deserve comment and clarification. In the ongoing US Public Health Service primary drug resistance ...