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Mucha S.,University of Life Sciences in Poznań | Grajewski B.,Koluda Wielka Experimental Unit Station of National Institute of Animal Production | Gornowicz E.,Koluda Wielka Experimental Unit Station of National Institute of Animal Production | Lisowski M.,Koluda Wielka Experimental Unit Station of National Institute of Animal Production | And 2 more authors.
Journal of Applied Genetics | Year: 2014

Contrary to chicken and livestock mammals, duck genome has not been explored much. Nowadays a relatively small number of reports on molecular variability and mapping of loci in Peking ducks has been published. Therefore, the objective of this study was to detect single loci affecting body weight, carcass and meat traits in Peking ducks (Anas platyrhynchos). The study was based on an F2 cross between two parental lines A-55 and GL-30. Phenotypes of 387 birds from generation F2 including carcass and meat quality traits were collected. Linkage map, of the linkage group CAU1, consisting of 29 microsatellite markers was constructed. One highly significant (p < 0.01) QTL for skin weight was identified at the beginning (0 cM) of the linkage group CAU1. Two significant QTL (p < 0.05) were found for fatness of leg muscle and leg muscle electrical conductivity - 24 hours post slaughtering (EC24h) at 178 and 100 cM, respectively. Additionally one suggestive QTL for odour of leg muscle was identified at 265 cM. © 2014 Institute of Plant Genetics, Polish Academy of Sciences, Poznan.


Mucha S.,University of Life Sciences in Poznań | Gornowicz E.,Koluda Wielka Experimental Station of the National Research Institute of Animal Production | Lisowski M.,Koluda Wielka Experimental Station of the National Research Institute of Animal Production | Grajewski B.,Koluda Wielka Experimental Station of the National Research Institute of Animal Production | And 2 more authors.
Annals of Animal Science | Year: 2014

The aim of this study was to estimate coefficients of heritability as well as genetic and phenotypic correlations among body weight and carcass traits. The dataset contained records of 387 birds from the second crossbred generation. The following traits were recorded: body weight (BW) at 11 weeks, carcass weight (CW), breast muscle weight including superficial and deep muscle (BMW), leg muscle weight including thigh and shank (LMW), wings weight (WW), skin with subcutaneous fat weight (SW), abdominal fat weight (AFW), skeleton with the back muscle and inedible elements (SBM), and liver weight (LW). Estimates of variance components were obtained by the average information - REML algorithm in the ASReml package. Very high slaughter yield (74.90%) was obtained. Generally, the coefficients of heritability were high. The highest one of 0.75 was estimated for body weight at 11 weeks. High coefficients of h2 were estimated for breast muscle weight (0.69), wings weight (0.70), carcass weight (0.65), skin with subcutaneous fat weight (0.57) and skeleton with the back muscle (0.58), whereas h2 of liver weight was 0.29. Both phenotypic and genetic relationships between the recorded traits were usually positive. Generally, it seems that the crossbreeding scheme can be perceived as a suitable proposal for the breeding practice.

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