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Chromosome identities were assigned to 15 linkage groups of the RFLP joinmap developed from four intraspecific cotton (Gossypium hirsutum L.) populations with different genetic backgrounds (Acala, Delta, and Texas Plains). The linkage groups were assigned to chromosomes by deficiency analysis of probes in the previously published joinmap, based on genomic(More)
As a method for representing development, latent trait theory is presented in terms of a statistical model containing individual parameters and a structure on both the first and second moments of the random variables reflecting growth. Maximum likelihood parameter estimates and associated asymptotic tests follow directly. These procedures may be viewed as(More)
BACKGROUND Analysis of subgroups such as different ethnic, language, or education groups selected from among a parent population is common in health disparities research. One goal of such analyses is to examine measurement equivalence, which includes both qualitative review of the meaning of items as well as quantitative examination of different levels of(More)
 Ninety-six F2.F3 bulked sampled plots of Upland cotton, Gossypium hirsutum L., from the cross of HS46×MARCABUCAG8US-1-88, were analyzed with 129 probe/enzyme combinations resulting in 138 RFLP loci. Of the 84 loci that segregated as co-dominant, 76 of these fit a normal 1 :  2 : 1 ratio (non-significant chi square at P=0.05). Of the 54 loci that segregated(More)
The Neoproterozoic era (1,000-542 Myr ago) was an era of climatic extremes and biological evolutionary developments culminating in the emergence of animals (Metazoa) and new ecosystems. Here we show that abundant sedimentary 24-isopropylcholestanes, the hydrocarbon remains of C(30) sterols produced by marine demosponges, record the presence of Metazoa in(More)
An RFLP genetic linkage joinmap was constructed from four different mapping populations of cotton (Gossypium hirsutum L.). Genetic maps from two of the four populations have been previously reported. The third genetic map was constructed from 199 bulk-sampled plots of an F2.3 (HQ95–6×’MD51ne’) population. The map comprises 83 loci mapped to 24 linkage(More)
Newlywed spouses (N = 215 couples) were tested on 21 tests of specific cognitive abilities and responded to a questionnaire on their educational and socioeconomic (SES) background. A comparison of the present spouse correlations with those of long-standing marriages suggests that spouses resemble each other in abilities from the start and that the degree of(More)
A 2-year study was conducted to determine the relationships between plant canopy photosynthesis, canopy light interception, and plant productivity of cotton (Gossypium hirsutum L.) exhibiting differing leaf morphologies. The near-isogenic lines were from a single background (MD 65-11) and represented the leaf shapes Normal (small leaf lobing), Sub-Okra(More)
The authors use multiple-sample longitudinal data from different test batteries to examine propositions about changes in constructs over the life span. The data come from 3 classic studies on intellectual abilities in which, in combination, 441 persons were repeatedly measured as many as 16 times over 70 years. They measured cognitive constructs of(More)
Ribosomes are complex ribonucleoprotein structures that function as the machinery for synthesizing proteins needed for the maintenance, growth, development, and reproduction of cells. During the biogenesis of these structures, ribosomal precursors, i.e. ribonucleoprotein particles, are formed by the assembly of rRNA and ribosomal proteins in the nucleolus.(More)