Male infertility is a global health problem caused by many factors, including primary ciliary dyskinesia (PCD), multiple morphologic abnormalities of the flagella (MMAF), and genetic in which PCD MMAF have been reported to be associated with variants AK7 gene. So, this study aimed evaluate association polymorphisms rs2275554 infertile men Vietnamese population. Total DNAs were isolated from 421...

background: indigenous chickens could serve as precious genetic resources that should be considered in conservation and breeding programs. the major histocompatibility complex (mhc) has a strong association to disease resistance/susceptibility, production and reproduction traits in chicken. therefore, identifying its polymorphism in populations under selective breeding could be used for selecti...

In a population evolving by gradual change, the amount of genetic variation is important because the rate of evolution is absolutely limited by the degree of genetic variability. Various forces of evolution such as natural selection, random genetic drift and migration operate on genetic variability which provides the raw material for evolution. Thus the rate of evolution is absolutely limited b...

Detectable polymorphism of host resistance and parasite host range is a poor guide to the specificity of a host-parasite interaction. I analyse a simple haploid model to support this claim. The model assumes that the true specificity is 'matching-allele', in which each of n host alleles causes resistance to only one of n different parasite alleles. The detectable polymorphism in samples from a ...

The genetic basis of color polymorphism is explored in the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Sternorrhyncha), in which two color morphs have been described (pink or green). Laboratory crosses and a Mendelian genetic analysis reveal that color polymorphism in pea aphids is determined by a single biallelic locus, which we name colorama, with alleles P and p, pink being dominant ...

Current methods for detecting fluctuating selection require time series data on genotype frequencies. Here, we propose an alternative approach that makes use of DNA polymorphism data from a sample of individuals collected at a single point in time. Our method uses classical diffusion approximations to model temporal fluctuations in the selection coefficients to find the expected distribution of...

■ Abstract Polymorphism, or variation within species, is common in all kinds of data and is the major focus of research on microevolution. However, polymorphism is often ignored by those who study macroevolution: systematists and comparative evolutionary biologists. Polymorphism may have a profound impact on phylogeny reconstruction, species-delimitation, and studies of character evolution. A v...

Summer mortalities of Crassostreagigas are a major concern in oyster aquaculture. They are the result of a complex interaction between the host, pathogens and environmental factors. Oyster genetics have been identified as an essential determinant of oyster susceptibility to summer mortalities. As the capability of oysters to circumvent diseases depends in part on their immune defenses, we aimed...

Genetic changes contributing to phenotypic differences within or between species have been identified for a handful of traits, but the relationship between alleles underlying intraspecific polymorphism and interspecific divergence is largely unknown. We found that noncoding changes in the tan gene, as well as changes linked to the ebony gene, contribute to pigmentation divergence between closel...

Type 2 diabetes and the insulin resistance syndrome have been hypothesized to constitute manifestations of an ongoing acute-phase response. We aimed to study an interleukin-6 (IL-6) gene polymorphism in relation to insulin sensitivity (I L-6 is the main cytokine involved in an acute-phase response). Subjects homozygous for the C allele at position –174 of the IL-6 gene (SfaNI genotype), associa...