Black colored Speckled Australorps is actually bred to have eggs production. Plumage is black with quick white locations; ear-lobes is purple; brush is actually single. Off is white into the the colour; shanks is light, some pigmented rather than enough time.
73 as well as cockerels 0.88 kilogram. The latest alive pounds out of 150-day-old pullets try 1.82 hence out-of mature hens dos.2 kilogram. New real time weight away from cocks try dos.6 kilogram.
The typical annual creation of Black Speckled Australorps is actually 2 hundred egg weigh 55 grams. Eggs shells is actually ointment-colored. Fertility from eggs is actually 95%, hatchability 80-85%. Endurance price of one’s younger up to 150 weeks was 95%; compared to people is ninety%.
The fresh live lbs away from 56-day-old pullets is actually 0
The brand new wild birds are well modified so you can battery staying sometimes physically otherwise inside the groups. Several other ability try a top resistance to pullorum condition dating in Pittsburgh is hard. They are important because the carriers of one’s recessive sp gene, that’s guilty of new light shade of the plumage and you will a far greater look of carcasses. Advent of which gene on populations getting the principal E gene create subscribe their broad use by chicken business.
RUSSIAN White (Russkaya belaya)
So it breed was lead while in the 1929-53 because of the mating White Leghorn boys which have ladies away from regional communities, followed by inter se reproduction of crosses with assorted grades regarding Leghorn heredity. The brand new crossbreeding in it Leghorns of different origin – Danish, English, American – for every which consists of own manufacturing and you can outside has actually. Choice encountered the reason for boosting eggs production, stability, growth rate and you may real time lbs.
In advance of 1965 Russian Whites was the principal egg-laying birds about USSR. An average annual design was 175-190 eggs for each and every layer; eggs lbs is 57-sixty grams. In-breeding condition facilities the fresh eggs production of Russian Whites was 220-230 annually. But not, significantly less than industrial standards Russian Whites could not compete with imported outlines and you can crosses out-of White Leghorns. It fell behind by the 40-50 eggs annually and also by around 2.5-3.0 g inside eggs lbs.
For that reason the new stock of Russian Whites, that 1975 is 30.eight mil, got reduced to 4.cuatro mil because of the 1980. They are nonetheless utilized in considerable wide variety inside the Turkmenia, Uzbekistan and you may Azerbaijan.
At this time, breeding run Russian Light birds is done within the Yasnaya Polyana breeding ranch inside the Stavropol territory. In very first phase (1967-69), breeding are according to choice and you can parents were examined by their daughters’ development. In 1970 new reproduction program is transformed so you can production of inbred outlines (n = 40) and you can a processing people. The main version of inbreeding are between paternal half of-sibs, rarely between complete sibs. The latest birds hatched during the 1973 had an inbreeding coefficient (Wright) off almost 37%. The average production of the latest half dozen better inbred outlines inside the 475 months try 200-205 eggs consider 54-56 g. The fresh new crosses of them traces had a top creation – 211-236 eggs annually.
Chickens on the society try light when you look at the pounds and produce brief egg. Its plumage is white; skin and shanks was reddish; he has got just one comb.
The fresh live lbs out of 8-week-dated pullets try 0.55 kilogram; that cockerels try 0.56 kilogram. Mature hens weighing step 1.6 kg, cocks 2.0 kilogram. Fertility away from eggs is located at 93%; hatchability is 82%; survival rate of more youthful and you can adults was 95 and you can ninety-five% respectively. Eggs creation for the initially and intermediate populace while in the 70 months out of life is 182 and you will 206 eggs out-of 55 g.
Of some attention ‘s the population regarding Russian Light birds at the brand new Most of the-Commitment Browse Institute off Ranch Creature Reproduction and Genetics. It actually was produced by option for resistance to subnormal heat into the the original times of lifestyle and highest egg development. Birds are free of leukosis while having a top effectiveness Marek’s condition and you can carcinomas off organs. Girls is elevated on temperature being 8-10 lower than normal. In 1984 which populace numbered five hundred lead.