Send to

Choose Destination
See comment in PubMed Commons below
Mar Biotechnol (NY). 2001 Nov;3(6):555-60.

Elucidation of the molecular basis of a null allele in a rainbow trout microsatellite.

Author information

Department of Animal Breeding and Genetics, Danish Institute of Agricultural Sciences, Tjele, Denmark.


The use of microsatellites for studies of population structure, as markers in genome mapping, and for parentage control has become increasingly popular in recent years. However, the presence of null alleles can lead to confounding results when using microsatellites. In the Omy3DIAS microsatellite, the presence of a null allele was discovered by analysis of family material. The null allele was sequenced after amplification with new primers located farther away from the repeat sequence. The null allele was shown to be caused by a deletion of a 4-bp sequence, which was part of a repetitive sequence within one of the primer recognition sites. As this phenomenon has been seen in other cases of null alleles, this observation leads to the recommendation to avoid repetitive sequences of any kind within primer sequences. Allele-specific amplification of the null allele revealed the presence of a single variant of this allele.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Springer
    Loading ...
    Support Center