Mapping quantitative trait loci affecting some carcass and meat traits in duck (Anas platyrhynchos)

Abstract

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.

Successful Identification of Duck Genome Region Determining Desirable Uniformity of Meat Performance Traits

“…The present study is a continuation of earlier works by Mucha et al (2014aMucha et al ( , 2014b and Moliński et al (2015) with the same experimental material. It should be mentioned that the parental lines A-55 (Pekin-type ducks of Polish origin) and GL-30 (Pekin-type ducks of French origin) are conventionally used in Poland for production of commercial hybrids (A-55 x F-11, A-55 x P-55, A-55 x P-44 and GL-50 x GL-30) intended for intensive rearing of meat ducks (Wencek et al, 2015).…”

“…As already stated, the population examined here was analyzed in previous studies by Mucha et al (2014b), who did not find any significant effects of genome regions on the traits included in the present study. The detection of important duck genome regions was performed using classical methodology with construction of a linkage map and estimation of parameters based on a linear unitrait genetic additive model.…”

“…As already mentioned, two parental lines: A-55 (Pekin-type ducks of Polish origin) and GL-30 (Pekin-type ducks of French origin) were used in the experiment. More details on the crossbreeding experiment are given in the article of Mucha et al (2014b). All birds of each generation were kept under the same environmental and feeding conditions.…”

“…Finally, 29 polymorphic microsatellite markers were further analyzed. The detailed description of the molecular methods applied in the present study is given in Mucha et al (2014b). The molecular identification of the sex of the individuals was determined using the method given by Clinton et al (2001).…”

“…Therefore, the analysis of the association between Anas platyrhynchos the genome and phenotypes is still limited. However, over the last decades a number of studies on the associations of single loci with performance traits of ducks (Huang et al, 2005(Huang et al, , 2006Maak et al, 2000;Wu et al, 2008;Gong et al, 2014;Mucha et al, 2014b), using different methodological approaches, have been published. Generally, they focus on single measures per individual.…”