Basic concepts of population genetics - Bioversity International
Basic concepts of population genetics - Bioversity International
Basic concepts of population genetics - Bioversity International
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Genotype frequency<br />
This is the frequency <strong>of</strong> a given genotype in a<br />
<strong>population</strong><br />
The frequencies <strong>of</strong> various types <strong>of</strong> breeding<br />
systems determine the mathematical<br />
relationship between the allele and genotype<br />
frequencies<br />
Copyright: IPGRI and Cornell University, 2003 Population <strong>genetics</strong> 15<br />
The natural breeding system <strong>of</strong> individuals can be examined through studies <strong>of</strong> the<br />
frequencies with which alternative genotypes occur in a <strong>population</strong>. When a<br />
<strong>population</strong> undergoes mating that is random relative to the alleles <strong>of</strong> interest, certain<br />
patterns <strong>of</strong> genotype frequencies may be expected.<br />
Genotype frequencies are also used to estimate the amount <strong>of</strong> self-pollination<br />
occurring in <strong>population</strong>s <strong>of</strong> individuals that have this or mixed type <strong>of</strong> reproduction.<br />
The mating or breeding system, therefore, has a significant effect on the frequency<br />
<strong>of</strong> occurrence <strong>of</strong> alternative genotypes in a given <strong>population</strong>.<br />
15
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