Black Speckled Australorps is actually bred getting egg development. Plumage are black that have brief white areas; ear-lobes try red-colored; comb was solitary. Off is actually light during the the colour; shanks is actually light, a little pigmented and not enough time.
73 as well as cockerels 0.88 kg. The latest real time lbs of 150-day-dated pullets is actually step one.82 and this regarding mature hens dos.dos kg. The newest real time advantageous site weight away from dicks is dos.six kg.
The typical yearly creation of Black colored Speckled Australorps try 2 hundred eggs weighing 55 grams. Eggs shells are lotion-colored. Virility from eggs is 95%, hatchability 80-85%. Survival rates of one’s younger as much as 150 weeks try 95%; compared to adults is actually 90%.
The newest birds are modified in order to power supply staying either individually otherwise during the organizations. Various other function is actually a top resistance to pullorum disease. They are crucial since carriers of your own recessive sp gene, that is responsible for the fresh new light color of new plumage and you may a much better look of carcasses. Advent of which gene to your populations obtaining prominent Elizabeth gene carry out subscribe its large usage by the chicken community.
That it reproduce is introduced throughout 1929-53 by the mating White Leghorn men which have females out-of regional populations, followed by inter se breeding off crosses with various grades out of Leghorn inheritance. The new crossbreeding in it Leghorns of various origin – Danish, English, American – for every using its own creation and you can outside have. Selection encountered the aim of boosting egg creation, stability, growth rate and you can live lbs.
Prior to 1965 Russian Whites was basically the principal eggs-laying birds from the USSR. The typical yearly manufacturing are 175-190 egg each coating; egg weight try 57-60 g. In-breeding state farms the latest eggs creation of Russian Whites is 220-230 annually. But not, lower than industrial conditions Russian Whites cannot take on imported lines and you may crosses off Light Leghorns. They decrease about of the forty-50 eggs a-year and by as much as dos.5-step three.0 g inside the eggs pounds.
For that reason the new stock of Russian Whites, that 1975 is 29.seven million, had decreased so you’re able to 4.4 million of the 1980. He is nevertheless used in considerable number inside Turkmenia, Uzbekistan and you may Azerbaijan.
Today, breeding run Russian White chickens is done into the Yasnaya Polyana reproduction farm for the Stavropol area. From inside the first stage (1967-69), breeding was predicated on choices and you may mothers have been analyzed because of the the daughters’ production. When you look at the 1970 the brand new breeding system is switched so you can production of inbred traces (n = 40) and you will a processing society. The main form of inbreeding is actually between paternal half-sibs, seldom anywhere between complete sibs. The newest birds hatched when you look at the 1973 got a keen inbreeding coefficient (Wright) from almost 37%. The common production of the fresh new half dozen most readily useful inbred traces within the 475 days is actually 200-205 egg weighing 54-56 grams. This new crosses ones outlines got increased manufacturing – 211-236 eggs annually.
Birds of the population was light from inside the lbs and develop quick eggs. The plumage try white; epidermis and you will shanks are red-colored; he has one comb.
The fresh new live lbs out-of 8-week-old pullets are 0.55 kg; that cockerels was 0.56 kilogram. Mature hens consider step 1.6 kilogram, dicks dos.0 kg. Fertility regarding eggs is located at 93%; hatchability are 82%; survival price of younger and you can adults are 95 and you will 92% correspondingly. Egg manufacturing towards 1st and you can intermediate society during 70 weeks out of life is 182 and you can 206 eggs from 55 g.
Of some attention ‘s the populace out-of Russian White birds during the the fresh All-Relationship Search Institute off Farm Creature Breeding and Genetics. It absolutely was created by choice for effectiveness subnormal heat within the the initial days of lives as well as for highest eggs creation. Chickens is actually without leukosis and get a leading resistance to Marek’s problem and you may carcinomas from internal organs. Chicks is raised on temperatures which are 8-10 below normal. In 1984 so it inhabitants designated five-hundred lead.