Genetic parameters of body weight,  egg production and shell quality traits  in the Brown Tsaiya laying duck

Ys, Cheng; Rouvier, R.; Poivey, Jean Paul J. P.; Tai, C.

doi:10.1051/gse:19950506

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References 16 publications

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“…42. Cheng et al (1995) by means of multivariate REML applied to an animal model, estimated the heritability of the number of eggs laid up to 52 weeks of age (h 2 ¼ 0 . 118) in one selected Brown Tsaiya line.…”

Section: Genetic Parametersmentioning

confidence: 99%

Heritabilities and genetic correlations of laying performance in Muscovy ducks selected in Taiwan

Hu¹,

Poivey²,

Rouvier³

et al. 2004

British Poultry Science

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1. Genetic parameters in the base population of a closed experimental strain of Muscovy ducks, selected for body weight at 10 weeks of age, were estimated from data in 8 successive generations, for the following traits: age at first egg (AGE1EGG), total number of eggs laid at 40 and 52 weeks of age (NEGG40 and NEGG52), number of eggs laid during 15 and 22 weeks in the first laying cycle (NEGG15W and NEGG22W), and their Box-Cox transformed data. 2. The method of multi-trait restricted maximum likelihood with an animal model was used to estimate genetic parameters. Only the results obtained with non-transformed data are shown. 3. Heritability estimates for laying performance showed moderate values, increasing little with age: 0.20+/-0.03 (AGE1EGG), 0.23+/-0.03 (NEGG40), 0.27+/-0.03 (NEGG52), 0.20+/-0.03 (NEGG15W), and 0.22+/-0.03 (NEGG22W). 4. Genetic correlations between laying traits were high. Genetic correlation between AGE1EGG and egg number was negative, it was positive between total numbers of eggs at 40 and 52 weeks and egg numbers in the first laying cycle. 5. Body weight at 10 weeks of age exhibited positive genetic correlations (0.46+/-0.06) with age at first egg and negative with egg production traits (-0.28+/-0.06 to -0.41+/-0.06). 6. The cumulated predicted genetic gains, after 7 generations of selection, expressed per genetic standard deviation unit (sigma(g)) were 0.06 sigma(g), 0.07 sigma(g), 0.17 sigma(g), 0.23 sigma(g), and 0.25 sigma(g) for AGE1EGG, NEGG40, NEGG52, NEGG15W, and NEGG22W, respectively. 7. Selecting Muscovy ducks to improve laying in Taiwanese climatic conditions would be possible using the number of eggs laid up to 52 weeks of age as the selection criterion. Because unintended selection effects for laying traits were present, the selection experiment for body weight at 10 weeks of age was not antagonistic with laying traits.

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Section: Genetic Parametersmentioning

confidence: 99%

Heritabilities and genetic correlations of laying performance in Muscovy ducks selected in Taiwan

Hu¹,

Poivey²,

Rouvier³

et al. 2004

British Poultry Science

Self Cite

View full text Add to dashboard Cite

show abstract

Genetic parameters of body weight, egg production and shell quality traits in the Brown Tsaiya laying duck

Abstract: Heritabilities were found to be low (0.094, 0.107, 0.118, 0.160, 0.169, 0.191 and 0.201 for ES40, ES30, NEGG52, NEGG40, FL20, EYW40 and AGE.1EGG, respectively), to medium (0.327, 0.329, 0.353, 0.425

Cited by 1 publication

References 16 publications

Heritabilities and genetic correlations of laying performance in Muscovy ducks selected in Taiwan

Heritabilities and genetic correlations of laying performance in Muscovy ducks selected in Taiwan

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