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| Normand, Julien; Ernande, Bruno; Boudry, Pierre. |
| Today, triploidy is the most common method used to genetically improve marine bivalve aquaculture production. In the Pacific oyster Crassostrea gigas, triploidy affects many traits. The most proeminent one is reproductive effort, which is greatly reduced compared to diploids. The combined effects of physiological trade-offs between survival, growth and reproduction together with the reduction of reproductive effort in triploids explains the global enhancement of yield observed. However, the sterility of triploid oysters is only partial and some triploid individuals can show normal gametogenesis (i.e. similar to diploids), especially under warm conditions. In diploid oysters, the heritability of reproductive effort has been shown to be relatively low, but a... |
| Tipo: Text |
Palavras-chave: Parentage analysis; Triploidy; Oyster; Quantitative genetics; Gametogenesis. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/acte-4525.pdf |
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| Prunier, Jérôme G.; Saint‐pé, Keoni; Blanchet, Simon; Loot, Géraldine; Rey, Olivier. |
| Inferring parameters related to the aggregation pattern of parasites and to their dispersal propensity are important for predicting their ecological consequences and evolutionary potential. Nonetheless, it is notoriously difficult to infer these parameters from wildlife parasites given the difficulty in tracking these organisms. Molecular‐based inferences constitute a promising approach that has yet rarely been applied in the wild. Here, we combined several population genetic analyses including sibship reconstruction to document the genetic structure, patterns of sibship aggregation, and the dispersal dynamics of a non‐native parasite of fish, the freshwater copepod ectoparasite Tracheliastes polycolpus. We collected parasites according to a hierarchical... |
| Tipo: Text |
Palavras-chave: Full‐sibs; Genetic structure; Parasite dispersal; Parentage analysis; Tracheliastes polycolpus; Transmission. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00693/80499/83694.pdf |
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