Variation and Heritability in Hair Diameter and Curvature in an Australian Twin Sample.
- Publisher:
- CAMBRIDGE UNIV PRESS
- Publication Type:
- Journal Article
- Citation:
- Twin Res Hum Genet, 2016, 19, (4), pp. 351-358
- Issue Date:
- 2016-08
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Filename | Description | Size | |||
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Ho et al (2016) Hair diameter and curvature in Twin Res Human Genet 19.pdf | Published version | 348.81 kB | Adobe PDF |
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Full metadata record
Field | Value | Language |
---|---|---|
dc.contributor.author | Ho, YYW | |
dc.contributor.author | Brims, M | |
dc.contributor.author |
McNevin, D https://orcid.org/0000-0003-1665-3367 |
|
dc.contributor.author | Spector, TD | |
dc.contributor.author | Martin, NG | |
dc.contributor.author | Medland, SE | |
dc.date.accessioned | 2022-01-31T22:29:31Z | |
dc.date.available | 2022-01-31T22:29:31Z | |
dc.date.issued | 2016-08 | |
dc.identifier.citation | Twin Res Hum Genet, 2016, 19, (4), pp. 351-358 | |
dc.identifier.issn | 1832-4274 | |
dc.identifier.issn | 1839-2628 | |
dc.identifier.uri | http://hdl.handle.net/10453/153999 | |
dc.description.abstract | Hair diameter and curvature are two characteristics of human scalp hair used in forensic contexts. While previous data show that subjective categorization of hair curvature is highly heritable, the heritability of objectively measured curvature and diameter, and variability of hair characteristics within each individual have not yet been studied. The present study measured hair diameter and curvature using an optical fiber diameter analyzer in a sample of 2,332 twins and siblings. Heritability was estimated using maximum likelihood structural equation modeling. Results show sex differences in the magnitude of genetic influence for mean diameter and curvature, with the vast majority of the variance accounted for by genetic effects in males (diameter = 86%, curvature = 53%) and females (diameter = 77%, curvature = 61%). The consistency of diameter (variance within an individual) was also highly heritable, but did not show sex limitation, with 68% of the variance accounted for by genetic factors. Moderate phenotypic correlations were seen between diameter and consistency (r = 0.3) but there was little correlation between diameter and curvature (r = -0.13). A bivariate Cholesky analysis was used to estimate the genetic and environmental correlations between hair diameter and consistency, yielding genetic correlations of r gF = 0.27 for females and r gM = 0.25 for males. | |
dc.format | Print-Electronic | |
dc.language | eng | |
dc.publisher | CAMBRIDGE UNIV PRESS | |
dc.relation | http://purl.org/au-research/grants/arc/LP110100121 | |
dc.relation.ispartof | Twin Res Hum Genet | |
dc.relation.isbasedon | 10.1017/thg.2016.45 | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.subject | 1103 Clinical Sciences, 1114 Paediatrics and Reproductive Medicine, 1702 Cognitive Sciences | |
dc.subject.classification | Genetics & Heredity | |
dc.subject.mesh | Adolescent | |
dc.subject.mesh | Australia | |
dc.subject.mesh | Child | |
dc.subject.mesh | Female | |
dc.subject.mesh | Hair | |
dc.subject.mesh | Humans | |
dc.subject.mesh | Male | |
dc.subject.mesh | Sex Factors | |
dc.subject.mesh | Twins, Dizygotic | |
dc.subject.mesh | Twins, Monozygotic | |
dc.subject.mesh | Whites | |
dc.subject.mesh | Hair | |
dc.subject.mesh | Humans | |
dc.subject.mesh | Sex Factors | |
dc.subject.mesh | Twins, Dizygotic | |
dc.subject.mesh | Twins, Monozygotic | |
dc.subject.mesh | Adolescent | |
dc.subject.mesh | Child | |
dc.subject.mesh | Australia | |
dc.subject.mesh | Female | |
dc.subject.mesh | Male | |
dc.subject.mesh | Whites | |
dc.title | Variation and Heritability in Hair Diameter and Curvature in an Australian Twin Sample. | |
dc.type | Journal Article | |
utslib.citation.volume | 19 | |
utslib.location.activity | England | |
utslib.for | 1103 Clinical Sciences | |
utslib.for | 1114 Paediatrics and Reproductive Medicine | |
utslib.for | 1702 Cognitive Sciences | |
pubs.organisational-group | /University of Technology Sydney | |
pubs.organisational-group | /University of Technology Sydney/Faculty of Science | |
pubs.organisational-group | /University of Technology Sydney/Strength - CFS - Centre for Forensic Science | |
pubs.organisational-group | /University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences | |
utslib.copyright.status | closed_access | * |
dc.date.updated | 2022-01-31T22:29:30Z | |
pubs.issue | 4 | |
pubs.publication-status | Published | |
pubs.volume | 19 | |
utslib.citation.issue | 4 |
Abstract:
Hair diameter and curvature are two characteristics of human scalp hair used in forensic contexts. While previous data show that subjective categorization of hair curvature is highly heritable, the heritability of objectively measured curvature and diameter, and variability of hair characteristics within each individual have not yet been studied. The present study measured hair diameter and curvature using an optical fiber diameter analyzer in a sample of 2,332 twins and siblings. Heritability was estimated using maximum likelihood structural equation modeling. Results show sex differences in the magnitude of genetic influence for mean diameter and curvature, with the vast majority of the variance accounted for by genetic effects in males (diameter = 86%, curvature = 53%) and females (diameter = 77%, curvature = 61%). The consistency of diameter (variance within an individual) was also highly heritable, but did not show sex limitation, with 68% of the variance accounted for by genetic factors. Moderate phenotypic correlations were seen between diameter and consistency (r = 0.3) but there was little correlation between diameter and curvature (r = -0.13). A bivariate Cholesky analysis was used to estimate the genetic and environmental correlations between hair diameter and consistency, yielding genetic correlations of r gF = 0.27 for females and r gM = 0.25 for males.
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