Heritability of growth in larvae and juveniles of Mytilus edulis

Strömgren, Tor; Nielsen, Marianne V.

doi:10.1016/0044-8486(89)90269-x

Cited by 39 publications

(32 citation statements)

References 12 publications

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“…Using the most conservative heritability estimates (sire component) obtained for larval growth in M. chilensis , and applying a selection intensity of 1.755 that is equivalent to select the higher 10% of the population for the trait, the estimated mean change in larval shell growth ranges between 18.3% and 33.6% per generation. Other studies (Mallet et al 1986; Stromgren & Nielsen 1989) report the same conclusion for the blue mussel M. edulis. Shell length growth rate is closely correlated with meat weight increase in M. edulis juveniles (Nielsen 1985), suggesting that selection for shell growth will at the same time increase the meat growth of mussels.…”

Section: Resultssupporting

confidence: 63%

“…Several other studies also describe heritabilities for larvae growth rates in C. virginica by analysing full‐ and half‐sib families; these estimates ranged between 0.25 and 0.71 (Newkirk et al 1977; Losee 1978). Another study based on a nested design reported heritabilities for larval growth rate in M. edulis ranging between h 2 =0.5±0.2 and 0.9±0.3 (Stromgren & Nielsen 1989). These estimates agree with the results obtained in the present study and it seems that a large portion of these traits show additive genetic variation.…”

Section: Resultsmentioning

confidence: 99%

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Heritability estimates of larval and spat shell height in the Chilean blue mussel (Mytilus chilensis Hupe 1854) produced under controlled laboratory conditions

et al. 2004

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The heritability of larval size is estimated in Mytilus chilensis, based on a nested design, involving 95 full‐sib and 19 half‐sib families (19 males each mated to 5 separated females) grown under controlled laboratory conditions. The half‐sib heritability estimates at 10, 25 and 40 days for larval and spat shell height ranged between 0.38±0.33 and 0.84±0.45, suggesting that selection for shell size would be effective.

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Section: Resultssupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Heritability estimates of larval and spat shell height in the Chilean blue mussel (Mytilus chilensis Hupe 1854) produced under controlled laboratory conditions

et al. 2004

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“…It is tendentious to compare heritabilities from different experiments since this parameter depends on the environment, the population under study and the experimental conditions. However, it is interesting to notice that the significant heritabilities we obtained for the selected populations (0n27 h# 0n84) are in the same range as heritabilities for growth performance found in natural populations of other bivalves (h# ss pSD l 0n5j0n2 and h# bs pSD l 0n8p0n3 in Mytilus edulis (Stro$ mgren & Nielsen, 1989), h# ss pSE l 0n72p0n32 to 0n91p0n17 in Mercenaria mercenaria (Rawson & Hilbish, 1990) and h# ss l 0n43p0n18 to 0n69p0n11 in Ostrea chilensis (Toro, 1995)). …”

Section: (Iii) What About a Further Round Of Selection ?supporting

confidence: 68%

Influence of parentage upon growth in Ostrea edulis: evidence for inbreeding depression

Naciri¹,

Launey²,

Lebayon³

et al. 2000

Genet. Res.

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SummaryGenetic variability for growth was analysed in three populations of Ostrea edulis, selected for resistance to the protozoan parasite Bonamia ostreae. This study was undertaken first to determine the potential for selection for growth in populations that have never been selected for this character, and second to estimate heterosis versus inbreeding depression. Growth was monitored in culture for 10 months. The selected populations (namely S85-G3, S89I-G2 and S89W-G2), their crossbred population and a control population were composed of full-sib families whose parents were already genotyped using five microsatellite markers. This genotyping allowed the estimation of genetic relatedness among pairs of parents. The parents' relatedness was then correlated with the growth performance of their offspring within each of the three populations, and inbreeding depression was estimated. The population effect for growth was highly significant, with the crossbred population having the highest growth rate, followed by S89I-G2 and S89W-G2, S85-G3 and the control population. The within-populations family effect was also highly significant, indicating, as well as the high value for heritability at the family level (between 0n57 and 0n92), that a potential for a further selection for growth still exists within the three populations. Estimates of inbreeding depression (relative to the mean, for complete inbreeding) were high (1 for S891-G2, 0n44 for S89W-G2 and between 0n02 and 0n43 for S85-G3), which correlates with the apparent heterosis for growth observed in the crossbred population. These results are discussed in the context of the future management of the selected populations.

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“…In addition to Toro et al (2004b), – who reported realized heritabilities – our results would be the second to report narrow‐sense heritabilities in adult body size of this species, and suggest that there exists additive genetic variation in this trait, but large non‐additive/common environmental effects persist during adulthood. One of the problems with quantitative genetic studies concerns the great differences that can be obtained with different methods of analysis (see, for instance Mallet, Freeman & Dickie 1986; Strömgren & Nielsen 1989; Ibarra, Ramirez, Ruiz Cruz & Avila 1999; Bolivar & Newkirk 2002; Toro et al 2004a). In the case of bivalve size, the great majority of published studies have been performed by standard statistical methods derived from linear models (i.e., parent–offspring regression, realized heritabilities from selection experiments, sib‐analyses and expected mean squares from anova (e.g., Toro & Paredes 1996, Toro et al 2004a, b).…”

Section: Discussionmentioning

confidence: 99%

Heritability of body size in the Chilean blue mussel (Mytilus chilensisHupé 1854): effects of environment and ageing

Alcapán

Nespolo

Toro

2007

Aquaculture Research

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Selection, either natural or artificial, induces an inter‐generational response only when the trait exhibits additive genetic variation. An index of additive genetic variation is narrow‐sense heritability (h2): the ratio between additive genetic variance and phenotypic variance. Here, we present narrow‐sense heritabilities for mass and size in the Chilean blue mussel Mytilus chilensis at different ages and in three different populations. We found that h2 changed with age and that maternal‐non‐additive variance was high, generating relatively low estimates of h2 in most cases. Our results, together with previous studies, suggest that genotype‐by‐environment interaction does not appear to play a significant role. However, we found that non‐additive and common environmental variance are important determinants of phenotypic morphological variation in body size in M. chilensis. Further studies are needed to establish the precise contributions of these sources of variation, to assess the real potential for response to selection.

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Heritability of growth in larvae and juveniles of Mytilus edulis

Cited by 39 publications

References 12 publications

Heritability estimates of larval and spat shell height in the Chilean blue mussel (Mytilus chilensis Hupe 1854) produced under controlled laboratory conditions

Heritability estimates of larval and spat shell height in the Chilean blue mussel (Mytilus chilensis Hupe 1854) produced under controlled laboratory conditions

Influence of parentage upon growth in Ostrea edulis: evidence for inbreeding depression

Heritability of body size in the Chilean blue mussel (Mytilus chilensisHupé 1854): effects of environment and ageing

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