Effective population size and inbreeding depression on litter size in rabbits. A case study

2014 ◽  
Vol 132 (1) ◽  
pp. 68-73 ◽  
Author(s):  
M. Ragab ◽  
J.P. Sánchez ◽  
M. Baselga
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Litter Size ◽  
Inbreeding Depression ◽  
Effective Population

COMPARATIVE ANALYSES OF EFFECTIVE POPULATION SIZE WITHIN AND AMONG SPECIES: RANID FROGS AS A CASE STUDY

Evolution ◽  
2011 ◽  
Vol 65 (10) ◽  
pp. 2927-2945 ◽  
Author(s):  
Ivan C. Phillipsen ◽  
W. Chris Funk ◽  
Eric A. Hoffman ◽  
Kirsten J. Monsen ◽  
Michael S. Blouin
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Effective Population ◽  
Comparative Analyses

scholarly journals Patterns of Inbreeding Depression and Architecture of the Load in Subdivided Populations

Genetics ◽  
2003 ◽  
Vol 165 (4) ◽  
pp. 2193-2212 ◽  
Author(s):  
Sylvain Glémin ◽  
Joëlle Ronfort ◽  
Thomas Bataillon
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Inbreeding Depression ◽  
Local Population ◽  
Population Subdivision ◽  
Deleterious Mutations ◽  
Effective Population ◽  
Subdivided Populations ◽  
And Migration ◽  
Insight Into

AbstractInbreeding depression is a general phenomenon that is due mainly to recessive deleterious mutations, the so-called mutation load. It has been much studied theoretically. However, until very recently, population structure has not been taken into account, even though it can be an important factor in the evolution of populations. Population subdivision modifies the dynamics of deleterious mutations because the outcome of selection depends on processes both within populations (selection and drift) and between populations (migration). Here, we present a general model that permits us to gain insight into patterns of inbreeding depression, heterosis, and the load in subdivided populations. We show that they can be interpreted with reference to single-population theory, using an appropriate local effective population size that integrates the effects of drift, selection, and migration. We term this the “effective population size of selection” (NeS). For the infinite island model, for example, it is equal to NeS=N(1+m∕hs), where N is the local population size, m the migration rate, and h and s the dominance and selection coefficients of deleterious mutation. Our results have implications for the estimation and interpretation of inbreeding depression in subdivided populations, especially regarding conservation issues. We also discuss the possible effects of migration and subdivision on the evolution of mating systems.

scholarly journals GENEALOGICAL DECOMPOSITION OF THE EFFECTIVE POPULATION SIZE: A CASE STUDY ON CROATIAN AUTOCHTHONOUS CATTLE BREEDS

Poljoprivreda ◽  
2015 ◽  
Vol 21 (1 sup) ◽  
pp. 52-55
Author(s):  
Martina Reljanović ◽  
◽  
Strahil Ristov ◽  
Vlatka Cubric Curik ◽  
Mato Čačić ◽  
...  
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Effective Population ◽  
Cattle Breeds

scholarly journals EFFECTS OF POPULATION SIZE AND SELECTION INTENSITY ON CORRELATED RESPONSES TO SELECTION FOR POSTWEANING GAIN IN MICE

Genetics ◽  
1973 ◽  
Vol 74 (1) ◽  
pp. 157-170
Author(s):  
E J Eisen ◽  
J P Hanrahan ◽  
J E Legates
Keyword(s):  
Body Weight ◽  
Population Size ◽  
Effective Population Size ◽  
Litter Size ◽  
The Body ◽  
Selection Intensity ◽  
Correlated Responses ◽  
Effective Population ◽  
Population Sizes ◽  
Selection For

ABSTRACT Correlated responses to selection for postweaning gain in mice were studied to determine the influence of population size and selection intensity. Correlated traits measured were three-, six- and eight-week body weights, litter size, twelve-day litter weight, proportion infertile matings and two indexes of reproductive performance. In general, the results agreed with observations made on direct response: correlated responses in the body weight traits and litter size increased as (1) selection intensity increased and (2) effective population size increased. Correlated responses in the body weight traits and litter size were positive in the large population size lines (16 pairs), as expected from the positive genetic correlation between these traits and postweaning gain. However, several negative correlated responses were observed at small population sizes (one and two pairs). Within each level of selection intensity, traits generally associated with fitness tended to decline most in the very small populations (one and two pairs) and in the large populations (16 pairs) for apparently different reasons. The fitness decline at the small effective population sizes was attributable to inbreeding depression. In contrast, it was postulated that the fitness decline at the large effective population size was due to selection moving the population mean for body weight and a trait positively correlated genetically with body weight (i.e., percent body fat) away from an optimum

scholarly journals Decomposing demographic contributions to the effective population size with moose as a case study

2019 ◽  
Vol 29 (1) ◽  
pp. 56-70 ◽  
Author(s):  
Aline Magdalena Lee ◽  
Ane Marlene Myhre ◽  
Stine Svalheim Markussen ◽  
Steinar Engen ◽  
Erling Johan Solberg ◽  
...  
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Effective Population
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