Estimation of genetic parameters from pedigreed populations: lessons from analysis of alevin weight in Coho salmon (Oncorhynchus kisutch)

Martı́nez, Vı́ctor; Neira, Roberto; Gall, G. A. E.

doi:10.1016/s0044-8486(99)00203-3

Cited by 44 publications

(24 citation statements)

References 25 publications

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“…As reported in Martinez et al [12] and Gjerdea et al [13], the ratios of the full-sib effect to phenotypic variance were 0.07-0.17 and 0.03-0.12 on alevin weight in Oncorhynchus keta and Gadus morhua, respectively. Early growth and development are vulnerable to the impact of maternal genetic effect in fish [5,[14][15][16][17].…”

Section: Discussionsupporting

confidence: 68%

Estimation of genetic parameters for growth traits of Japanese flounder Paralichthys olivaceus using an animal model

Liu

Wang

et al. 2010

Fish Sci

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To estimate genetic parameters of growth traits in Japanese flounder Paralichthys olivaceus, full-sib and half-sib families were produced in three consecutive years at the Beidaihe Central Experiment Station in China. Each year 8-28 families were produced. The body weight, body length and body depth at 180, 240, and 360 days of age were measured for 5,224 individuals. Four animal models were used to examine the phenotypic variation of growth traits and were compared using the likelihood ratio test. The results showed that estimates for additive genetic effect heritabilities varied greatly depending on the model, trait and age. The maternal effect had a significant impact on phenotypic variation only for body depth at 180 days of age, which explained 49% of the phenotypic variance. The ratio of full-sib effect to phenotypic variation ranged from 0.09 to 0.22. Growth traits all exhibited low heritability (0.13-0.39), indicating that there is the potential for family selection breeding for these traits in Japanese flounder. Using the full model with the fixed, full-sib family, additive and maternal genetic effects, genetic correlations among the three traits for fish of the same age were estimated to be more than 0.80. Generally, the genetic correlations gradually increased as age increased.

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Section: Discussionsupporting

confidence: 68%

Estimation of genetic parameters for growth traits of Japanese flounder Paralichthys olivaceus using an animal model

Liu

Wang

et al. 2010

Fish Sci

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“…(Patterson and Thompson, 1971) using animal models and BLUP analysis is made by simultaneously fitting the random effects in the linear model, assuming specified (co)variance matrices. Obtaining correct REML estimators is based on the assumption that sufficient information is known about the specified random effects and that the correct model is used for estimation and prediction purposes (Martínez et al, 1999).…”

Section: Breeding Valuesmentioning

confidence: 99%

Estimation of genetic parameters and breeding values in shrimp Fenneropenaeus chinensis using the REML/BLUP procedure

et al. 2011

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An analysis of a selection experiment was used to assess the impact of various animal model structures on REML estimates of variance components. The analyses were carried out based on 162 d body mass (BM) of 1 287 animals from 21 paternal half-sib groups of Fenneropenaeus chinensis. Estimated breeding values (EBV) of BM of all individuals were estimated using eight statistical models (A, AB, ABC, ABDC, ABMFC, ABMDC, ABFDC and ABMFDC) and BLUP (best linear unbiased prediction). These models were designed involving factors such as sex, spawn date as fixed effects, maternal genetic effects, full-sib family effects as random effects, mean BM of families at tagging and age at recording (covariate). The results demonstrate the importance of correct interpretation of effects in the data set, particularly those that can influence resemblance between relatives. The data structure and the particular model that was applied markedly influenced the magnitude of variance component estimates. Models based on few effects obtained upward biased estimates of additive genetic variance. The accuracy of genetic parameters and breeding value estimated by ABFDC model was higher than other models. The results imply that additive genetic direct value, full-sib family effects, and covariance effects besides sex and spawn date as fixed effects were very important for estimating genetic parameters and breeding value of body mass. This model had a heritability estimate of 162 d BM of 0.44. The comparison of the efficiency of selection based on breeding values or phenotypic value revealed great difference: average breeding value of the best 24 families selected by the 162 d BM breeding value and phenotype were 0.577 g and 0.366 g, respectively, representing a 36.57% higher efficiency in the former. In conclusion, selection based on breeding value was more effective than selection based on phenotypic value. Our results indicate that effects influencing the magnitude of estimates should be taken into account when estimating heritability and breeding values for BM.

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“…Negative maternal-animal genetic correlation might be more common in egg-laying species without adult care because total energetic investment is determined prior to oviposition without much ecological recourse to post-hatch investment. However, trends are not readily apparent for the latter group from the limited literature to date (see Koerhuis and Thompson 1997;Martínez et al 1999;Hartmann et al 2003).…”

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confidence: 99%

Shifting Patterns in Genetic Control at the Embryo-Alevin Boundary in Brook Charr

et al. 2004

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Abstract. Maternal inputs to offspring early in development are initially high but the process of development suggests that ontogenetic shifts in the importance of maternal genetic variation relative to other sources should occur. We investigated additive genetic variance and covariance for direct (animal), sire, and maternal effects on embryonic length (EL), yolk sac volume (YSV), and alevin (after yolk sac resorption) length (AL) for 460 embryonic and 460 alevin brook charr (Salvelinus fontinalis) in 23 half-sib families (12 sires, 23 dams). There were no additive genetic effects of sires or individual animals on their own phenotype using sire-dam and maternal-animal models for YSV or EL ( Ͻ 0.05). However, at the alevin stage we detected low but significant heritability for AL ( ϭ 0.14 Ϯ h AL responded highly with those in the animal-dam model. We did not detect significant genetic covariance between progeny and dams for preresorption traits or between sires and dams for any trait. However, following resorption of the yolk sac, the genetic value of dams for AL was negatively correlated with that of individual progeny (r m,a ϭ Ϫ0.38 Ϯ 0.13), suggesting trade-offs and/or stabilizing selection between maternal and animal genetic trait value. This finding was supported by models of dam fecundity on offspring length and dam weight in phenotypic space. Heritability estimates using simple regression of embryo phenotype on adult parental phenotype produced upwardly biased estimates of genetic variance (h 2 Ͼ 1.0). We propose that development through the embryo-alevin boundary may be a major point in salmonids for ontogenetic changes in the genetic architecture of embryo size from maternal genetic effects to those of the individual organism, and that maternal-offspring conflicts in resource allocation related to size may be partially indicated by negative genetic covariance.

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Estimation of genetic parameters from pedigreed populations: lessons from analysis of alevin weight in Coho salmon (Oncorhynchus kisutch)

Cited by 44 publications

References 25 publications

Estimation of genetic parameters for growth traits of Japanese flounder Paralichthys olivaceus using an animal model

Estimation of genetic parameters for growth traits of Japanese flounder Paralichthys olivaceus using an animal model

Estimation of genetic parameters and breeding values in shrimp Fenneropenaeus chinensis using the REML/BLUP procedure

Shifting Patterns in Genetic Control at the Embryo-Alevin Boundary in Brook Charr

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