Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selectio...Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selection work. In this work, the interrelation among various qualitative characteristics of eggs of Shanxing egg ducks breed, their variability and an individual assessment of ducks-mothers was considered. Prospects of carrying out selection on increase of yolk ratio in egg were estimated.展开更多
基金Supported by the Earmarked Fund for National Waterfowl-industry Technology Research System(CARS-43-2)National Supporting Projects for Science and Techniques(2012BAD12B10)Special Project for International Science and Technology Cooperation(2013DFA31880)
文摘Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selection work. In this work, the interrelation among various qualitative characteristics of eggs of Shanxing egg ducks breed, their variability and an individual assessment of ducks-mothers was considered. Prospects of carrying out selection on increase of yolk ratio in egg were estimated.
