Heat tolerance is a physiologically and genetically complex trait regulated by multiple genes. To investigate the genetic basis of heat tolerance, eight parents (five lines three testers) their fifteen F1 hybrids were evaluated under normal high-temperature stress conditions for two consecutive years. Data recorded plant height, number bolls, boll weight, seed cotton yield, ginning out turn (GO...

Forty strains of Gram-positive, aerobic, heterotrophic bacteria isolated from saturated subsurface lacustrine, paleosol and fluvial sediments at the US Department of Energy's Hanford Site in south central Washington State were characterized by phylogenetic analysis of 16S rRNA gene sequences and by determination of selected morphological, physiological and biochemical traits. Phylogenetic analy...

Identification of quantitative trait loci (QTLs) in experimental animals is critical for understanding the biochemical bases of complex traits, and thus for the identification of drug targets. The author reviews the basic statistical methods for mapping QTLs in experimental crosses and comments on a number of the statistical issues to consider in the application of these methods.