It was bred by German Roman company, which is a medium-weight and high-laying layer, with four lines as a complete set, with feather color and sex-linked genes.
It is a four-line medium-weight high-yielding brown-shell layer bred by French Issa. It has good heat resistance and is currently one of the world’s main high-yielding chicken breeds. It has two sex-linked genes, feather color and fast and slow feathering.
It was bred by the British Ross Company and is a high-yielding layer with strong adaptability and good stress resistance performance. There are two sex-linked genes: gold and silver and fast and slow feathers.
Dika Warren (brown)
It is an excellent brown-shell layer bred by American Dekabu Poultry Breeding Company. Four-line matching, with feather color sex-associated genes, able to identify male and female.
Star Miscellaneous 579 (brown)
Also known as S579, it was bred by the Canadian Shafer Company. The chicken has a sex-linked inheritance of feather color, which can identify male and female according to different colors of feathers.
Medium-sized brown-shell layer hens bred by Yuribude Company in the Netherlands. It has a sex-linked gene for feather color. This chicken has the characteristics of gentle temperament, good management, strong cold resistance, good stress resistance, and has a long egg production peak period and few broken eggs. However, it has poor heat resistance and is suitable for breeding in cold regions.
Medium-sized brown-shell layer hens bred by American Hyland International Company. The chicken has a gentle temperament, good adaptability, early production, early egg production peak and a long duration, and has a sex-linked gene for plumage color.
Star Miscellaneous 288 (White)
Also known as S288, it was bred by Shafer Company in Canada. The size and coat color are similar to those of Bailaihang chickens, but they are lighter in weight. This chicken has the characteristics of less feed, more eggs, heavier eggs and no brooding.
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