Related Experiment Video
Updated: Jun 2, 2026

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
Published on: July 11, 2025
The influence of recombination on SNP diversity in chickens
Yousheng Rao1, Liang Sun, Qinghua Nie
1Department of Biological Technology, Jiangxi Institute of Education, Nanchang, PR China.
Abstract:
The association between recombination rate and diversity, but not divergence is considered to be driven mainly by natural selection: fixation of positively selected variants and associated hitchhiking effects and/or background selection eliminating deleterious alleles. In the present study, we investigated the relationship between recombination rate, SNP diversity and interspecies divergence for 29 loci in chickens. We found that recombination rate is positively correlated with nucleotide diversity but is not correlated with interspecies divergence. It appears that variation in recombination rate explains over 30% of the variation in levels of diversity among 29 loci. Our data suggested that natural selection is a main factor in shaping SNP diversity in chickens. Since SNP diversity is significantly lower at Z-linked than at autosomal loci, we argued that genetic hitchhiking might be more important than background selection in producing the observed correlation.
Related Concept Videos
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
Crossing Over
Crossing Over
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Gene Conversion
Complementation Tests
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...

