Main layers imported from China:
(1) Roman Brown: It was bred by German Roman Company, belonging to medium-sized high-yield laying hens, with four lines and feather color linkage gene.
(2) Issa Brown: bred by Issa Company of France, it belongs to four-line medium-heavy and high-yield brown shell laying hens. With good heat resistance, it is one of the main high-yield laying hens in the world at present, with two sex-linked genes: feather color and fast and slow feather.
(3) Rose Brown: It is a high-yield laying hen bred by British Ross Company, with strong adaptability and good stress resistance. There are two sex-linked genes: gold and silver and fast and slow feathers.
(4) Hyland Brown: Medium-sized brown shell laying hens cultivated by Hyland International Company of the United States. The chicken has docile temperament, good adaptability, early laying, early laying peak and long duration, and has feather color linkage genes.
(5) Dika Warren (brown): It is an excellent brown-shell laying hen cultivated by Dika Poultry Breeding Company of the United States. Four-line matching, with feather sex gene, can be divided into male and female.
(6) Hesse (brown): a medium-sized brown shell laying hen cultivated by Cheng Yulibud Company in the Netherlands. Genes with feather color and sex. This kind of chicken is gentle in temperament, easy to manage, strong in cold resistance and stress resistance, and has the characteristics of long laying peak period and few broken eggs. However, the heat resistance is poor, so it is suitable for breeding in cold areas in the north.
(7) Xingza 288 (white): also known as s 288, bred by Schaefer Company of Canada. The body shape and coat color are similar to those of white leghorn chicken, but the weight is lighter. This kind of chicken has the characteristics of less feed consumption, more eggs, heavy eggs and no nesting.
(8) Xingza 579 (Brown): also known as S579, bred by Schaefer Company of Canada. Chickens have the sex inheritance of feather color, and they can be distinguished according to the different feather colors.
(2) China's own improved laying hens and main excellent local laying hens.
1, Beijing White Chicken: It is an excellent new strain of white-shell laying hens bred by Beijing experts on the basis of foreign white-shell parents and commercial chickens. Chickens have the appearance characteristics of white breeds, with small and exquisite figure, white and compact feathers, big and bright red crowns, thick and upright cocks' crowns, and thin and lean hens' crowns to one side. The skin of beak, shin and toe is yellow, and the leaves of ears are white. They are lively and active and have strong foraging ability.
2. Bai Bin Chicken: It was bred by Heilongjiang Northeast Agricultural College during 1976- 1984. This is a hybrid laying hen with pale white eggs. It belongs to Laihang chicken type. The main characteristics of this kind of chicken are: laying more eggs, large eggs, good egg quality, strong vitality, both flat and caged.
3. Beijing Red Chicken: Xingza 579, introduced by Beijing No.2 Chicken Farm in 198 1, was bred after 9 generations by combining comprehensive traits and merger index. It has the characteristics of strong adaptability, strong disease resistance, brown eggshell, high egg production, male and female feather color identification and stable genetic performance.
4. White-eared yellow chicken: also known as tremella chicken. Named for its yellow feathers and white ears. Originated in Guangfeng, Shangrao, Yushan, Jiangxi and Shanxian, Zhejiang. Chickens are characterized by white ears, yellow fur, yellow skin and yellow feet, light body, compact feathers, upturned tail and thick eggshell. The feathers of adult cocks are reddish brown, and there are a few shiny blue and black feathers in the tail feathers. The meat is long, thin and bright red. Small head, short and sharp beak, developed feet, slender body and wide back, gentle temperament, flexible action and strong foraging ability.
5. Xianju chicken: also known as Meilin chicken. Originated in Xianju County, Zhejiang Province. It is a local small laying hen breed, which is resistant to rough feeding and has strong foraging ability, and is suitable for grazing. Small in size, firm and compact, symmetrical and beautiful, and sensitive in action. The head is slender, the eyes are prominent, the beak is curved, the crown is single, and the foot is high. There are three colors of hen's coat: yellow, flower and black, and white and variegated. The tail feather and the inner feather of the main wing are black, and some neck feathers have fish-scale black spots. Roosters are mainly golden yellow and red-black, and their calves are yellow. Too much is nesting. The cock weighs 1.2- 1.5 kg and the hen weighs 1. 1 kg. The delivery period is 160- 180 days. Oviposition per year 180-200 eggs, the egg weight is 40-50g, and the eggshell is yellowish brown. This chicken has a thin bone. The slaughter rate is high, the meat is delicious and the value of eliminating hens is high.