Search Results - (Author, Cooperation:C. R. Primmer)

2015-11-05

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Aging/*genetics ; Animals ; Biological Evolution ; Body Size/*genetics ; Female ; Fish Proteins/*genetics/metabolism ; Genetic Variation/*genetics ; Genome-Wide Association Study ; Growth/*genetics ; Humans ; Male ; Models, Biological ; Phenotype ; Reproduction/genetics/physiology ; Salmo salar/*genetics ; *Sex Characteristics ; Transcription Factors/genetics/metabolism

1095-8649

Blackwell Publishing Journal Backfiles 1879-2005

Biology

By simulating all possible offspring genotypic combinations based on pair-wise matings in three vulnerable or endangered populations of salmonids (two Atlantic salmon Salmo salar and one Arctic charr Salvelinus alpinus), family level estimates of potential offspring genetic diversity were calculated using several commonly used genetic diversity estimators (〈inlineGraphic alt="inline image" href="urn:x-wiley:00221112:JFB200:JFB_200_mu1" location="equation/JFB_200_mu1.gif"/〉, 〈inlineGraphic alt="inline image" href="urn:x-wiley:00221112:JFB200:JFB_200_mu2" location="equation/JFB_200_mu2.gif"/〉 and HEST). By using this approach, the genetic variability of offspring could be predicted accurately based solely on parental genotype data. In addition, significant associations between offspring genetic variability and fitness-related traits were observed in the two Atlantic salmon populations and these associations were consistent between fitness measures and either estimated or observed genetic diversity. This indicates that associations with offspring fitness measures can be predicted without genetic analysis of the offspring themselves.

Electronic Resource

1095-8649

Blackwell Publishing Journal Backfiles 1879-2005

Biology

Large escapes of cultured salmon from net-pens have become inevitable disasters linked to the growth of aquaculture in coastal areas. Hybridization between farmed and wild salmon has been witnessed; but the extent of eventual genetic introgression is controversial as selection against hybrids can maintain distinct gene pools. Individual assignment tests based on genetic data have been widely used in fisheries, due to the importance of accurate population assignment for a variety of purposes including distinction between individuals of native and stocked origin. However the ability of these Bayesian programs to detect hybrids and subsequent generations between closely related populations has been little investigated. Here we present results regarding the efficiency of two new computer programs, structure and New Hybrids in detecting hybridization between farmed and wild salmon from the river Teno (Northern Europe) based on genetic data obtained from 17 microsatellite loci.

Electronic Resource

1095-8649

Blackwell Publishing Journal Backfiles 1879-2005

Biology

One hundred and twenty Danio rerio and Campostoma anomalum microsatellite loci were tested for amplification in the cyprinids Phoxinus phoxinus, Scardinius erythrophthalmus, Rutilus rutilus, Abramis brama, Carassius carassius and Gobio gobio. The PCR amplification products were recorded in 35 to 50 loci, depending on focal species. Eight to 28 of the amplifying loci were also polymorphic, establishing potential sets of genetic markers for population genetics studies.

Electronic Resource

1432-0762

Key words Breeding synchrony ; Breeding density ; Hirundo rustica ; Paternity ; Male ornaments ; Mate guarding

Springer Online Journal Archives 1860-2000

Biology

Abstract The barn swallow (Hirundo rustica) is a socially monogamous passerine which usually breeds in colonies where extra-pair copulations are frequent. Males intensively guard their mates during the female fertile period. Since males are more likely to be available for extra-pair copulations when their mate is not fertile, synchrony in timing of breeding may affect paternity of individual males. In this study, we analysed the change in mate-guarding rate by males in relation to the fertility condition of the female, and the relationships between breeding synchrony and density with paternity in first broods of 52 male barn swallows. Paternity (proportion of nestlings fathered in own brood) was assessed by typing of three highly polymorphic microsatellite loci. Mate guarding by males peaked during the fertile period of their mates. Paternity increased as breeding synchrony in the colony increased. Paternity of barn swallows is positively associated with the degree of exaggeration of male tail ornaments. The relationship between male ornamentation and paternity was partly mediated by an effect of ornament size on breeding synchrony. We suggest that females might delay breeding with low-quality males to enhance their opportunities for being fertilised by high-quality extra-pair males.

Electronic Resource