University of Missouri

About: University of Missouri is a education organization based out in Columbia, Missouri, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 41427 authors who have published 83598 publications receiving 2911437 citations. The organization is also known as: Mizzou & Missouri-Columbia.

Allele-defined genome of the autopolyploid sugarcane Saccharum spontaneum L.

Abstract: Modern sugarcanes are polyploid interspecific hybrids, combining high sugar content from Saccharum officinarum with hardiness, disease resistance and ratooning of Saccharum spontaneum. Sequencing of a haploid S. spontaneum, AP85-441, facilitated the assembly of 32 pseudo-chromosomes comprising 8 homologous groups of 4 members each, bearing 35,525 genes with alleles defined. The reduction of basic chromosome number from 10 to 8 in S. spontaneum was caused by fissions of 2 ancestral chromosomes followed by translocations to 4 chromosomes. Surprisingly, 80% of nucleotide binding site-encoding genes associated with disease resistance are located in 4 rearranged chromosomes and 51% of those in rearranged regions. Resequencing of 64 S. spontaneum genomes identified balancing selection in rearranged regions, maintaining their diversity. Introgressed S. spontaneum chromosomes in modern sugarcanes are randomly distributed in AP85-441 genome, indicating random recombination among homologs in different S. spontaneum accessions. The allele-defined Saccharum genome offers new knowledge and resources to accelerate sugarcane improvement.

Stochastic resonance on a circle.

Abstract: We describe a new realization of stochastic resonance, applicable to a broad class of systems, based on an underlying excitable dynamics with deterministic reinjection. A simple but general theory of such ``single-trigger'' systems is compared with analog simulations of the Fitzhugh-Nagumo model, as well as experimental data obtained from stimulated sensory neurons in the crayfish.

Allure of negative feedback: self-verification strivings among depressed persons.

Abstract: We propose that people with negative self-views are rejected because they gravitate to partners who view them unfavorably. In relation to nondepressed college students (n = 28), depressives (n = 13) preferred interaction partners who evaluated them unfavorably (Study 1). Similarly, in relation to nondepressives (n = 106), depressives (n = 10) preferred friends or dating partners who evaluated them unfavorably (Study 2). Dysphorics (n = 6) were more inclined to seek unfavorable feedback from their roommates than were nondepressives (n = 16); feedback-seeking activities of dysphorics were also associated with later rejection (Study 3). Finally, people with negative self-views (n = 37) preferentially solicited unfavorable feedback, although receiving such feedback made them unhappy, in comparison with people with positive self-views (n = 42; Study 4). It seems a desire for self-verification compels people with negative self-views to seek unfavorable appraisals.

A genome triplication associated with early diversification of the core eudicots

Abstract: Background Although it is agreed that a major polyploidy event, gamma, occurred within the eudicots, the phylogenetic placement of the event remains unclear.

Male Gender Role Conflict, Depression, and Help Seeking: Do College Men Face Double Jeopardy?

Abstract: To investigate the previously untested hypothesis that college men with higher levels of male gender role conflict (MGRC) experience both increased risk of depression and more negative attitudes toward seeking counseling services, this study used latent variable modeling to examine these relations. Two components of MGRC were identified: restriction-related MGRC, which predicted 25% of the variance in help-seeking attitudes, and achievement-relatedMGRC, which predicted 21% of the variance in depression. It is suggested that outreach programs designed to increase college men's willingness to use counseling services attempt to counter the option-limiting aspects of male gender roles, whereas counseling with depressed college men incorporate an examination of their perceptions of success and achievement.