Results 251 to 260 of about 121,559 (279)
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2022
AbstractPopulations may respond to environmental changes through phenotypic plasticity, adaptation, migration, or suffer demographic declines if they are unable to respond. Climate change is already causing shifts in species ranges, changes in phenotypes, and altered life history traits and interspecific interactions.
Fred W. Allendorf +4 more
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AbstractPopulations may respond to environmental changes through phenotypic plasticity, adaptation, migration, or suffer demographic declines if they are unable to respond. Climate change is already causing shifts in species ranges, changes in phenotypes, and altered life history traits and interspecific interactions.
Fred W. Allendorf +4 more
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American Journal of Physical Anthropology, 1991
AbstractWe have compiled data on the frequency of first‐cousin marriages in Finland using royal dispensation records for the time period 1810–1872 and national population statistics for the time period 1878–1920. For the earlier period, 0.315% of Finland's marriages were contracted between first cousins (2,331 of 739,387). During the second time period,
L B, Jorde, K J, Pitkänen
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AbstractWe have compiled data on the frequency of first‐cousin marriages in Finland using royal dispensation records for the time period 1810–1872 and national population statistics for the time period 1878–1920. For the earlier period, 0.315% of Finland's marriages were contracted between first cousins (2,331 of 739,387). During the second time period,
L B, Jorde, K J, Pitkänen
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Inbreeding and inbreeding avoidance in wild giant pandas
Molecular Ecology, 2017AbstractInbreeding can have negative consequences on population and individual fitness, which could be counteracted by inbreeding avoidance mechanisms. However, the inbreeding risk and inbreeding avoidance mechanisms in endangered species are less studied.
Yibo Hu +11 more
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Human Heredity, 1970
An analysis of the rate of celibacy, under 2 criteria (at the ages of 30 and 40) among the offspring of consanguineous and non-consanguineous marriages did not show significant differences both among whites and non-whites (mulattoes and negroes), in a Central Brazilian region. There is, therefore, no evidence that rare recessive genes play an important
N, Freire-Maia, J B, Azevedo
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An analysis of the rate of celibacy, under 2 criteria (at the ages of 30 and 40) among the offspring of consanguineous and non-consanguineous marriages did not show significant differences both among whites and non-whites (mulattoes and negroes), in a Central Brazilian region. There is, therefore, no evidence that rare recessive genes play an important
N, Freire-Maia, J B, Azevedo
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Simultaneous inbreeding modifies inbreeding depression in a plant–herbivore interaction
Ecology Letters, 2013AbstractBecause inbreeding is common in natural populations of plants and their herbivores, herbivore‐induced selection on plants, and vice versa, may be significantly modified by inbreeding and inbreeding depression. In a feeding assay with inbred and outbred lines of both the perennial herb, Vincetoxicum hirundinaria, and its specialist herbivore ...
Kalske, A +6 more
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Average inbreeding or equilibrium inbreeding?
American journal of human genetics, 1986The equilibrium inbreeding is always higher than the average inbreeding. For human populations with high inbreeding levels, the inbreeding equilibrium is more than 25% higher than the average inbreeding. Assuming no initial inbreeding in the population, the equilibrium inbreeding value is closely approached in 10 generations or less. A secondary effect
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Annals of Human Genetics, 1977
In Norway specified information of marriages between second cousins and closer relations has been recorded in the marriage certificates since January 1889. In addition, information was collected in the 1891 census and in the Medical Registration of Births (established in 1967). A ratio of second- to first-cousin marriages equal to or greater than 2 has
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In Norway specified information of marriages between second cousins and closer relations has been recorded in the marriage certificates since January 1889. In addition, information was collected in the 1891 census and in the Medical Registration of Births (established in 1967). A ratio of second- to first-cousin marriages equal to or greater than 2 has
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, 2014 Increased relationships are a natural consequence of using only a few sires in an AI breeding program. Inbreeding can be avoided, but not without sacrifice of progress toward improved productivity.
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