Proliferation, dispersal and patterned aggregation of iridophores in the skin prefigure striped colouration of zebrafish Colour patterns are a striking feature of animals; they evolve rapidly and play an important role in natural as well as sexual selection. It has been propo... S Ajeet Pratap,...
The accumulation of beneficial and harmful mutations in a genome is studied by using analytical methods as well as computer simulation for different modes of reproduction. The modes of reproduction examined are biparental (bisexual, hermaphroditic), uniparental (selfing, automictic, asexual) and mixed...
Sexual reproduction largely predominates in animals, however, indicating that this cost is outweighed by the genetic and/or ecological benefits of sexuality, including the acquisition of advantageous mutations occurring in different individuals and the elimination of deleterious mutations. But the evolution ...
作者: CHANTAL CONAND,SVEN UTHICKE & THIERRY HOAREAU 摘要: Summary Stichopus chloronotus (Brandt, 1835) is one among nine aspidochirotide holothurian species known to reproduce both sexually by broadcast spawning and asexually by transverse fission. New data on the sexual cycle of this species ...
RRL Guillard - The Culture of Marine Invertebrate Animals 被引量: 1154发表: 1975年 IDENTIFICATION OF GROUP- AND STRAIN-SPECIFIC GENETIC MARKERS FOR GLOBALLY DISTRIBUTED ALEXANDRIUM (DINOPHYCEAE). II. SEQUENCE ANALYSIS OF A FRAGMENT OF THE... A fragment of the large-subunit (LSU) ribosomal RNA ...
Yet combining animals from both ephemeral and permanent hydroperiods revealed a 26% increase in asexual female lifespan across seasons (23% decrease in the rate of aging) and a 56% increase in asexual fecundity, suggesting that maintenance in benign laboratory conditions leads to slower aging. ...
Asexual animals described in other case studies reproduce ameiotically, while Cobitis hybrids described here produce eggs likely through modified meiosis. Therefore, our findings indicate that the effect of asexuality on the rate of chromosomal change may be context-dependent rather than universal and...
We investigate the timescales of these processes and discuss the results with reference to the genome degradation of the aphid endosymbiont Buchnera aphidicola. 展开 关键词: Animals Aphids Buchnera Antimutagenic Agents Genetics, Population Mutation Alleles Genome, Bacterial Models, Genetic Selection, ...
Fungi are thus appropriate organisms for studies of the reasons for the selection of sexuality or clonality and of the mechanisms underlying this selection. Magnaporthe oryzae, an Ascomycete causing blast disease on rice, reproduces mostly asexually in natura. Sexual reproduction is possible in vitro...
Toxoplasma gondii is a protozoan parasite responsible for widespread infections in humans and animals. Two major asexual forms are produced during the life... ID Manger,A Hehl,S Parmley,... - Infect Immun 被引量: 352发表: 1998年 Biology and recent developments in the systematics of Phoma, a...