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| PMID |
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| TITLE |
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| Variation and Heritability in Hair Diameter and Curvature in an Australian Twin Sample. |
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| ABSTRACT |
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| 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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| DATE PUBLISHED |
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| HISTORY |
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| PUBSTATUS |
PUBSTATUSDATE |
| entrez |
2016/06/14 06:00 |
| pubmed |
2016/06/14 06:00 |
| medline |
2017/10/21 06:00 |
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| AUTHORS |
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| NAME |
COLLECTIVENAME |
LASTNAME |
FORENAME |
INITIALS |
AFFILIATION |
AFFILIATIONINFO |
| Ho YY |
|
Ho |
Yvonne Y W |
YY |
|
QIMR Berghofer Medical Research Institute,Brisbane,Queensland,Australia. |
| Brims M |
|
Brims |
Mark |
M |
|
BSC Electronics Pty Ltd,Perth,Western Australia,Australia. |
| McNevin D |
|
McNevin |
Dennis |
D |
|
National Centre for Forensic Studies,Faculty of Education,Science,Technology and Mathematics,University of Canberra,Canberra,Australian Capital Territory,Australia. |
| Spector TD |
|
Spector |
Timothy D |
TD |
|
Kings College,London,UK. |
| Martin NG |
|
Martin |
Nicholas G |
NG |
|
QIMR Berghofer Medical Research Institute,Brisbane,Queensland,Australia. |
| Medland SE |
|
Medland |
Sarah E |
SE |
|
QIMR Berghofer Medical Research Institute,Brisbane,Queensland,Australia. |
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| INVESTIGATORS |
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| JOURNAL |
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| VOLUME: 19 |
| ISSUE: 4 |
| TITLE: Twin research and human genetics : the official journal of the International Society for Twin Studies |
| ISOABBREVIATION: Twin Res Hum Genet |
| YEAR: 2016 |
| MONTH: 08 |
| DAY: |
| MEDLINEDATE: |
| SEASON: |
| CITEDMEDIUM: Internet |
| ISSN: 1832-4274 |
| ISSNTYPE: Print |
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| MEDLINE JOURNAL |
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| MEDLINETA: Twin Res Hum Genet |
| COUNTRY: England |
| ISSNLINKING: 1832-4274 |
| NLMUNIQUEID: 101244624 |
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| PUBLICATION TYPE |
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| PUBLICATIONTYPE TEXT |
| Journal Article |
| Twin Study |
| Research Support, Non-U.S. Gov't |
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| COMMENTS AND CORRECTIONS |
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| GRANTS |
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| GENERAL NOTE |
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| KEYWORDS |
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| KEYWORD |
| hair curvature |
| hair diameter |
| heritability |
| twin study |
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| MESH HEADINGS |
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| DESCRIPTORNAME |
QUALIFIERNAME |
| Adolescent |
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| Australia |
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| Child |
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| European Continental Ancestry Group |
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| Female |
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| Hair |
physiology |
| Humans |
physiology |
| Male |
physiology |
| Sex Factors |
physiology |
| Twins, Dizygotic |
genetics |
| Twins, Monozygotic |
genetics |
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| SUPPLEMENTARY MESH |
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| GENE SYMBOLS |
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| CHEMICALS |
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| OTHER ID's |
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