Genetic Significance of the relationship between absolute total finger ridge count and its variability
01 Jun 1987-International Journal of Anthropology (Springer Science and Business Media LLC)-Vol. 2, Iss: 2, pp 141-149
TL;DR: Regression analysis showed that both the standard deviation and the coefficient of variation are significantly related to mean ATFRC, and about 35% of the variation in ATFRC is explained by the dependent variable coefficent of variation.
Abstract: In order to test the hypothesis of a major gene effect on absolute total finger ridge count (ATFRC), the nature of relationship between mean ATFRC and its variability was evaluated in a series of 47 population samples from India. Regression analysis showed that both the standard deviation and the coefficient of variation are significantly related to mean ATFRC, and about 35% of the variation in ATFRC is explained by the dependent variable coefficent of variation. These results support the hypothesis of a major gene effect on the trait ATFRC.
Citations
More filters
TL;DR: The present report supports the evidence of the existence of a major gene on these dermatoglyphic traits and the transmission of this effect is consistent with Mendelian expectation.
Abstract: Background: It is well established that dermatoglyphics are genetically determined. But, to date, few studies have given attention to the inheritance pattern of dermatoglyphics. Furthermore, despit...
28 citations
TL;DR: The evidence indicates the possible role of environmental (prenatal) factors in the realization of dermatoglyphic sex differences among the Chuvashian population of Russia and corresponds better than fingers to the ethno historical background of the populations, ascertained by numerous studies.
Abstract: With the aim of determining sex dimorphism among the Chuvashian population of Russia, digital and palmar dermatoglyphics of 547 individuals (293 males, 254 females) were analyzed. The sex differences for PII, TRC, and AFRC are similar to Indian and Jewish populations. Correlation coefficients between individual finger ridge counts are a little lower than in Jews but are almost equal to Indian populations. The Mantel test of matrix correlation between sexes for 22 traits shows a very good similarity. However, sex differences of palmar traits display different levels when compared with other human populations. In light of this, our evidence indicates the possible role of environmental (prenatal) factors in the realization of dermatoglyphic sex differences. The development of palmar dermatoglyphics has had a relatively longer growth period compared with fingers [Cummins, H., 1929. The topographic history of the volar pads (walking pads, tast ballen) in the human embryo. Embryol. 20, 103-126]. The palmar dermatoglyphic pattern of affinities therefore corresponds better than fingers to the ethno historical background of the populations, ascertained by numerous studies.
22 citations
TL;DR: The present results support the hypothesis that both types of asymmetry have a genetic basis and are influenced by the intrauterine environment.
Abstract: In this study of the genetics of dermatoglyphic asymmetry, we collected bilateral finger and palm prints of 824 individuals from 200 families including 2 generations from an endogamous caste (Vaidya) in Barasat, North 24-Parganas District, West Bengal. Two main types of asymmetry (fluctuating asymmetry and directional asymmetry) were calculated between the two hands. The study includes familial correlation between first-degree relatives, principal-components analysis, and maximum-likelihood-based heritabilities (by pedigree analysis). We found, first, that familial correlations in all possible pairs of relationships (except spouse correlation) were weak but positive; some were even statistically significant. No indication of assortative mating was observed, but the influence of maternal environment could not be discarded. The results also showed that X-chromosome linkage does not seem to be involved. A second major finding is that five principal factors could be extracted from all these asymmetric traits, explaining 74.207% of the overall cumulative variance. Asymmetry of finger and palmar areas were clearly separated by factor. In addition, the heritabilities of the extracted five factors were in the range of 8-24%. These estimates are in agreement with some previously published data. The heritabilities of the factors describing palmar asymmetry are slightly lower than those describing finger asymmetry. The present results support the hypothesis that both types of asymmetry have a genetic basis and are influenced by the intrauterine environment.
10 citations
01 Dec 2012
TL;DR: The results of palmar traits reveal homogeneity which also presents a common picture obtained in the earlier studies, perhaps due to the possible role of environmental (prenatal) factors in the realization of dermatoglyphics between finger and palm.
Abstract: Quantitative finger and palmar dermatoglyphics of 218 individuals (170 males and 48 females) belonging to the Muzeina Bedouins from South Sinai Peninsula. They are characterized with a high degree of consanguinity, a small isolate nomadic tribe. 22 quantitative dermatoglyphic traits (12 finger and 10 palms) were considered in the present study. Except PII (non-significant sex difference), the results of significant sex differences of finger ridge counts (TFRC), MLI are similar with the earlier studies in various populations. However, the results of palmar traits reveal homogeneity which also presents a common picture obtained in the earlier studies, perhaps due to the possible role of environmental (prenatal) factors in the realization of dermatoglyphics between finger and palm. The development of palmar dermatoglyphics has a relatively longer growth period compared with fingers (Cummins 1929). Thus, the palmar dermatoglyphic pattern of affinities corresponds better than fingers to the ethno-historic background of the populations (Reddy et al. 1988, Karmakar et al. 1989, 2002, 2008, 2010).
10 citations
TL;DR: Variations in finger and palmar dermatoglyphic patterns are investigated among the Limboo, a little known population of Sikkim, and affinity of theLimbo to some of the populations of Assam and North-East India is shown.
Abstract: Variations in finger and palmar dermatoglyphic patterns are investigated among the Limboo (18-60 years, 150 males and 150 females), a little known population of Sikkim. The results for Limboo were compared with other North-East Indian populations. The most commonly occurring pattern was loop (males: 64.33%; females: 75.00%) followed by whorl (males: 31.00%; females: 21.33%) and finally arch (males: 4.67%; females: 3.66%). There were no significant differences between sexes in pattern types. The overall values of pattern intensity (P.I.I.), Dankmeijer's (D.I.) and Furuhata's (F.I.) indices were 14.08, 12.60 and 96.06 respectively. The P.I.I. was within the range for East Asian populations of North-East India. The D.I. was similar to those reported for Rajbanshi, Kalita, Rabha and Newar populations, while F.I. was higher than in other populations of Eastern Himalaya and North-East India. The most frequently occurring mainline formulae in all palm prints (left and right combined) were 7.5'.5.- followed by 9.7.5.- and finally 11.9.7.- (p>0.05) and these were similar to the reported values for other North-eastern populations of India. The mean values of total finger ridge count (TFRC) and absolute finger ridge count (AFRC) were greater among males (138.03; s=42.26 and 198.78; s=77.4) than females (137.91; s=44.15 and 194.47; s=86.71). The a-b ridge count was greater among females than males. Sex differences in AFRC and a-b ridge count were both statistically significant (p<0.05). The mean TFRC values were within ranges for populations of North-East India. Cluster analysis based on P.I.I., D.I. and F.I. shows affinity of the Limbo to some of the populations of Assam and North-East India.
9 citations
References
More filters
TL;DR: A set of data containing samples from both Caucasian and Japanese populations are analyzed and suggest that a single major autosomal locus with two additive alleles may account for over half the variation of the quantitative phenotype absolute finger ridge count.
Abstract: Dermatoglyphics, as defined by finger ridge count, is considered a classic example of polygenic inheritance in man. A set of data containing samples from both Caucasian and Japanese populations are analyzed by fitting a mixture of normal distributions, utilizing maximum likelihood estimation. The results are homogeneous over all subsets of the data and suggest that a single major autosomal locus with two additive alleles may account for over half the variation of the quantitative phenotype absolute finger ridge count. Existence of this locus awaits confirmation by pedigree or linkage analyses.
32 citations
TL;DR: It is shown that a discontinuous distribution of the factor scores exists, while the phenotypic character standing under the strongest influence of the above mentioned factor presents a continuous frequency curve.
Abstract: In einer vorlaufigen Mitteilung wird uber faktorenanalytische Familienstudien zur Variabilitat des digitalen und palmaren Papillarsystems berichtet. Das Untersuchungsgut umfast 36 quantitative Merkmale von 518 Personen aus 92 Familien. Auser 7 Finger-und Hauptlinienfaktoren, die denen nach Knusmann (1967b) entsprechen, ergaben sich 3 bezuglich der beiden Hande symmetrisch wirkende Faktoren (Abb. 4): einer, der die Leistenzahl der Interdigitalraume II und IV, einer, der diejenige der Interdigitalraume III, und einer, der die atd-Winkel beeinflust. Am Beispiel des gewichtigsten Faktors (radiomedialer Faktor) wird gezeigt, das eine diskontinuierliche Verteilung der individuellen Faktorenwerte vorliegt, wahrend das phanotypische Merkmal, das unter dem starksten Einflus dieses Faktors steht (Leistenzahl des linken Mittelfingers), eine kontinuierliche Frequenzkurve aufweist. Eine gewisse Diskontinuitat tritt auch in den intrafamiliaren Faktorenwertverteilungen in Form von Gruppenbildungen hervor. Fur eine einfache Monomerie als Grundlage des radiomedialen Faktors spricht die intrafamiliare Faktorenwertverteilung jedoch erwartungsgemas nicht.
18 citations
TL;DR: The patterns of interpopulation variation of asymmetry and interdigital diversity are not exactly in congruence of the pattern of genetic variation whereas the traits themselves depict genetic proximity at this early stage of local genetic differentiation.
7 citations