Female arrive at intimate maturity within 162 times of decades

Black Speckled Australorps are bred to own eggs manufacturing. Plumage was black colored that have small white areas; ear-lobes was yellow; comb is unmarried. Off try light during the the color; shanks is actually white, slightly pigmented rather than a lot of time.

73 and of cockerels 0.88 kilogram. The fresh new live pounds from 150-day-old pullets is step one.82 and that regarding adult hens dos.dos kilogram. The live lbs away from dicks is actually 2.six kg.

The typical yearly production of Black Speckled Australorps is actually 2 hundred eggs weigh 55 g. Eggs shells try ointment-colored. Virility out of egg is actually 95%, hatchability 80-85%. Emergency speed of more youthful as much as 150 weeks is 95%; that of grownups is actually ninety%.

The new real time weight away from 56-day-dated pullets try 0

This new wild birds are well modified so you’re able to power supply keeping both really or into the communities. Some other function are a premier effectiveness pullorum situation. They are important as the carriers of one’s recessive sp gene, that’s guilty of brand new light shade of the newest plumage and you may a better look of carcasses. Advent of it gene to the populations obtaining dominant E gene perform subscribe its greater use because of the chicken globe.

RUSSIAN Light (Russkaya belaya)

This breed was put throughout the 1929-53 by mating White Leghorn guys that have women from local populations, followed closely by inter se breeding out-of crosses with various levels regarding Leghorn inheritance. The newest crossbreeding inside it Leghorns various resource – Danish, English, American – for every single which consists of individual production and you can exterior has actually. Solutions met with the purpose of boosting egg manufacturing, stability, growth rate and alive pounds.

Ahead of 1965 Russian Whites was in fact the primary eggs-installing birds on USSR. The average yearly design is actually 175-190 egg per level; eggs pounds are 57-60 grams. In-breeding state farms the fresh eggs production of Russian Whites are 220-230 annually. Although not, under industrial requirements Russian Whites couldn’t contend with brought in lines and you can crosses away from Light Leghorns. It dropped about by the forty-50 eggs a-year by as much as 2.5-step three.0 g inside eggs lbs.

Therefore the fresh stock out-of Russian Whites, that 1975 are 29.7 billion, had decreased so you can cuatro.4 million by the 1980. They are still included in big number in the Turkmenia, Uzbekistan and you may Azerbaijan.

At present, reproduction focus on Russian White chickens is carried out from inside the Yasnaya Polyana breeding ranch in the Stavropol region. From inside the basic stage (1967-69), breeding are according to choices and you will moms and dads was basically analyzed because of the the daughters’ manufacturing. Within the 1970 the latest reproduction system is actually turned in order to production of inbred contours (letter = 40) and you can a running populace Over 50 dating sites. Area of the sorts of inbreeding was ranging from paternal 1 / 2 of-sibs, rarely anywhere between complete sibs. The newest wild birds hatched during the 1973 had an inbreeding coefficient (Wright) off almost 37%. The common creation of the newest six ideal inbred outlines from inside the 475 weeks is actually two hundred-205 egg weighing 54-56 g. The crosses of them contours had a higher development – 211-236 egg per year.

Birds from the populace is light in the lbs and develop short egg. Their plumage are light; surface and shanks is actually purple; he has got a single brush.

New alive lbs away from 8-week-dated pullets are 0.55 kg; that of cockerels are 0.56 kilogram. Mature hens weighing 1.6 kilogram, dicks 2.0 kilogram. Virility away from eggs is at 93%; hatchability is 82%; endurance rate out of young and you will grownups try 95 and you may 92% correspondingly. Eggs manufacturing towards the initially and you can advanced population during the 70 days away from every day life is 182 and you may 206 egg regarding 55 grams.

Of a few focus is the population out of Russian Light birds at the latest The-Connection Lookup Institute away from Ranch Animal Breeding and you may Genetics. It had been produced by option for resistance to subnormal temperatures for the the first times of lifetime as well as for highest eggs development. Chickens is actually clear of leukosis and now have a leading effectiveness Marek’s situation and you will carcinomas out-of organs. Chicks try raised on temperatures which happen to be 8-10 below normal. In 1984 that it people numbered five-hundred lead.