Effects of heterosis on growth in height and its segments: a cross-sectional study of the Khasi girls in Northeast India

Khongsdier, R.; Mukherjee, Nandita

doi:10.1080/03014460310001592669

Cited by 17 publications

(10 citation statements)

References 26 publications

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“…While fitting of growth functions from sampling of random individuals of differing age certainly limits the power to detect underlying differences in growth phases, the approach may still be applicable. At least one human study has used a cross‐sectional design to determine the relationship of environmental quality and gene flow on timing and magnitude of growth phases (Khongsdier and Mukherjee 2003). With our model, we demonstrate the potential for dolphins, showing age‐related changes in growth velocities between males and females and evidence of at least some differences ( i.e.…”

Section: Discussionmentioning

confidence: 99%

Investigation of growth phases for bottlenose dolphins using a Bayesian modeling approach

McFee¹,

Schwacke

Stolen

et al. 2009

Marine Mammal Science

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The Gompertz function is the most commonly used growth function for cetacean studies. However, this function cannot represent multiple phases of growth. In this study, we present a Bayesian framework fitting parameters of a triple‐logistic growth function to describe multiple phases of growth for bottlenose dolphins (Tursiops truncatus), simultaneously fitting and comparing all growth parameters between South Carolina (SC), Mississippi Sound (MSS), and Indian River Lagoon (IRL) cohorts. The fitted functions indicated a preliminary early, rapid growth phase, followed by a second phase of slower growth, and then a moderate growth spurt later in life. Growth parameters between geographic cohorts did not show obvious differences, although asymptotic length for SC dolphins was lower than MSS and IRL dolphins and significantly lower between females from SC and the IRL. Growth rate velocities between the sexes showed females exceed males initially (<1 yr), followed by males gaining an advantage around the ages of 3–4 yr until the age of around 15 yr when growth rates for both sexes approached zero (asymptotic length). This study demonstrates age‐related changes in growth rates between bottlenose dolphin sexes and evidence of at least some differences (i.e., asymptotic length) across geographic cohorts.

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Section: Discussionmentioning

confidence: 99%

Investigation of growth phases for bottlenose dolphins using a Bayesian modeling approach

McFee¹,

Schwacke

Stolen

et al. 2009

Marine Mammal Science

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“…However, many interspecific hybrids suffer from reduced longevity and reductions in fertility. Heterosis in humans has been proposed, sometimes controversially, to affect multiple phenotypes including attractiveness [1], IQ [2,3], and height [4][5][6]. In agricultural settings, there are numerous examples in which heterosis has been harnessed to create more productive and more uniform products including livestock [7][8][9][10][11] and crop plants (reviewed in [12][13][14][15][16][17][18][19]).…”

Section: Introductionmentioning

confidence: 99%

Heterosis: Many Genes, Many Mechanisms—End the Search for an Undiscovered Unifying Theory

Kaeppler

2012

ISRN Botany

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Heterosis is the increase in vigor that is observed in progenies of matings of diverse individuals from different species, isolated populations, or selected strains within species or populations. Heterosis has been of immense economic value in agriculture and has important implications regarding the fitness and fecundity of individuals in natural populations. Genetic models based on complementation of deleterious alleles, especially in the context of linkage and epistasis, are consistent with many observed manifestations of heterosis. The search for the genes and alleles that underlie heterosis, as well as for broader allele-independent, genomewide mechanisms, has encompassed many species and systems. Common themes across these studies indicate that sequence diversity is necessary but not sufficient to produce heterotic phenotypes, and that the molecular pathways that produce heterosis involve chromatin modification, transcriptional control, translation and protein processing, and interactions between and within developmental and biochemical pathways. Taken together, there are many and diverse molecular mechanisms that translate DNA into phenotype, and it is the combination of all these mechanisms across many genes that produce heterosis in complex traits.

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“…They found significantly greater height and weight in children of marriages between a Khasi female and Muslim male than in Christian and Khasi boys. In another study, Khongsdier and Mukherjee (2003b) analyzed 1368 Khasi girls from Shillong in northeastern India aged 3-18 years. They divided them into hybrid and nonhybrid girls and tested the effects of heterosis using analysis of covariance with household income as covariate.…”

Section: Discussionmentioning

confidence: 99%

Offspring from endogamic vs. exogamic matings: Absence of anthropometric differences among Sardinian children (Italy)

Sanna

Micco

Palmas

et al. 2010

American J Hum Biol

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This study evaluates possible differences in body dimensions among children from matings of different exogamy levels. The cross-sectional sample consisted of 867 children, 435 males, and 432 females, 6-10 years old, attending elementary schools in the metropolitan area of Cagliari, the capital of Sardinia (Italy). The children were divided into two groups according to the level of exogamy. The first group consisted of children of parents born in the same Sardinian municipality and was considered endogamous sensu stricto. The second group included children of parents born in municipalities from different Sardinian linguistic domains and was considered exogamous. The Mann-Whitney test did not reveal significant differences between the two groups of children in the mean rank values of the 36 anthropometric variables considered, with the exception of cephalic circumference in males and chest depth in females. In particular, there were no significant differences for anthropometric variables considered to be indirect indicators of nutritional status: sum of skinfolds, waist/hip ratio, body mass index, total upper arm area, upper arm muscle area, and upper arm fat area. The results indicate that Sardinian children from marriages of different exogamy levels do not differ in body dimensions if they grow up with similar nutritional and socioeconomic conditions.

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Effects of heterosis on growth in height and its segments: a cross-sectional study of the Khasi girls in Northeast India

Cited by 17 publications

References 26 publications

Investigation of growth phases for bottlenose dolphins using a Bayesian modeling approach

Investigation of growth phases for bottlenose dolphins using a Bayesian modeling approach

Heterosis: Many Genes, Many Mechanisms—End the Search for an Undiscovered Unifying Theory

Offspring from endogamic vs. exogamic matings: Absence of anthropometric differences among Sardinian children (Italy)

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