Close
Global Lactase Persistence Association Database GLAD
This is an online database resource presenting LP phenotypic and genotypic allele frequency data: interpolated LP frequency maps are shown, focussing on the Old World.
We encourage researchers to send us new LP phenotype / genotype data to Professor Dallas Swallow in an Excel format using headers identical to those in the tables linked below.
Please make sure that the submitted phenotype data conform to the following criteria:
- Random sampling
- Known ethnicity and sampling location
- Indigenous population (preferably, but please alert us and supply details, if not)
- No hospital patients or individuals self reporting with gut problems
Latest Maps
Distribution of Lactase Persistence phenotype
Worldwide
Old World
Dots represent test locations. Colours and colour key show LP frequency distribution represented by surface interpolation. Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.
Frequency of 13907*G (rs41525747)
Dots represent collection locations. Colours and colour key show the allele frequency distribution represented by surface interpolation. Taken from Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.
Frequency of 13910*T (rs4988235)
Dots represent collection locations. Colours and colour key show the allele frequency distribution represented by surface interpolation. Taken from Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.
Frequency of 13915*G (rs41380347)
Dots represent collection locations. Colours and colour key show the allele frequency distribution represented by surface interpolation. Taken from Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.
Frequency of 14009*G (rs869051967)
Dots represent collection locations. Colours and colour key show the allele frequency distribution represented by surface interpolation. Taken from Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.
Frequency of 14010*C (rs145946881)
Dots represent collection locations. Colours and colour key show the allele frequency distribution represented by surface interpolation. Taken from Ingram,C.I, Montalva, N and Swallow, D.M. 2022 'Lactose Malabsorption’, in Advanced Dairy Chemistry, Volume 3: Lactose, Water, Salts and Minor Constituents McSweeney et al eds. ISBN 978-3-030-92584-0. See data links below.