Limited interspecific introgression has been achieved in the breeding of the two primary cultivated species of cotton (Gossypium hirsutum L. and G. barbadense L.). Genetic diversity of 16 near-homozygous elite cotton genotypes derived from interspecific hybridization was investigated at the DNA level with the random amplified polymorphic DNA (RAPD) procedure and at the phenotypic level with stable and highly heritable morphological characters. Eighty random decamer primers were used to amplify DNA via the polymerase chain reaction (PCR) and 135 RAPDs were generated. Nineteen morphological traits were measured on the genotypes in field experiments in 1992 and 1993. Morphological characters were chosen that easily distinguish typical G. hirsutum (upland cotton) from G. barbadense (Pima cotton). Dendrograms were generated for genetic distance from the RAPDs and average taxonomic distance from the morphological data. Both procedures produced two clusters with one resembling G. hirsutum and one G. barbadense. Classification of all genotypes based on the two methods gave similar results with a correlation of 0.63 between the genetic distance and taxonomic distance. Several genotypes were identified that were genetically and phenotypically distant from typical G. hirsutum and G. barbadense. The level of polymorphism exhibited by these genotypes could be exploited in genetic mapping populations to tag economically important traits, such as fiber quality. These genotypes also could serve as a germplasm source of unique alleles in G. hirsutum that are derived from G. barbadense. This experiment demonstrates for the first time that RAPD analysis can reliably determine genetic relationships within a diverse array of Gossypium germplasm. E XTENSIVE INTERSPECIFIC genetic variation is present within the genus Gossypium and this variation is distributed among approximately 43 species (Percival and Kohel, 1990). The primary cultivated species are G. hirsutum and G. barbadense. The successful introgression of genes via interspecific introgression has resulted only after extensive recombination and selection (Stalker, 1980). Meredith (1991) and Niles and Feaster (1984) reviewed the transfer of desirable genes from exotic intraspecific and interspecific germplasm sources into contemporary upland cotton breeding programs. Genetic improvements in fiber quality have been achieved by exploiting Beasley's Triple Hybrid germplasm [(G. thurberi Tod. × G. arboreum L.) × G. hirsutum L.] (Culp et al., 1979). This was part of the Pee Dee germplasm program in South Carolina that employs population development procedures based on recombination and cyclical selection. Triple Hybrid germplasm has been introgressed into Acala 1517 germplasm in New Mexico Dep.

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This paper addresses the generation of rents and the distribution of gains in the global operations of governed

A two-dimensional Fourier compression method has been developed as a tool for portable sensors. Ion mobility spectrometry (IMS) yields an advanced chemical sensor for monitoring trace quantities of compounds in air. Two-dimensional Fourier compression can increase the compression efficiency without compromising the quality of compressed data. A criterion for the automatic determination of the compression efficiency or cutoff frequency has been developed and evaluated with IMS data. IMS data were compressed by 97% without significant loss of information.

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