Black colored Speckled Australorps is bred getting eggs production. Plumage are black colored with quick light areas; ear-lobes is actually red; brush was single. Down try white during the the colour; shanks are white, quite pigmented and never much time.
73 and of cockerels 0.88 kg. The real time lbs of 150-day-dated pullets was 1.82 and therefore off adult hens dos.dos kg. This new alive lbs regarding cocks was 2.6 kg.
The average yearly production of Black colored Speckled Australorps was two hundred egg weighing 55 grams. Eggs shells is actually cream-colored. Virility regarding eggs is actually 95%, hatchability 80-85%. Survival rate of your young doing 150 months are 95%; that people is actually 90%.
The brand new real time pounds of 56-day-dated pullets was 0
This new birds are very well adapted so you can power supply keeping sometimes truly otherwise inside the teams. Various other element is a high effectiveness pullorum problem. They are crucial since the carriers of one’s recessive sp gene, that is responsible for the brand new light colour of new plumage and you can a far greater appearance of carcasses. Introduction of this gene on the communities getting the dominant E gene perform subscribe the large usage from the poultry business.
RUSSIAN Light (Russkaya belaya)
It reproduce is introduced while in the 1929-53 of the mating Light Leghorn guys having people off local communities, accompanied by inter se breeding off crosses with various grades out-of Leghorn inheritance. The fresh crossbreeding inside Leghorns of different origin – Danish, English, American – per using its own design and you may external have. Choices had the reason for boosting eggs creation, viability, rate of growth and you can real time weight.
Prior to 1965 Russian Whites have been the primary eggs-putting birds from the USSR. The typical yearly creation is 175-190 eggs for every single coating; egg lbs was 57-sixty g. In breeding state facilities the newest egg creation of Russian Whites is 220-230 a year. Yet not, lower than commercial conditions Russian https://datingmentor.org/over-50-chat-room/ Whites could not contend with brought in outlines and crosses away from White Leghorns. It dropped behind because of the 40-fifty eggs a-year by as much as 2.5-step three.0 g in the eggs lbs.
For this reason the brand new stock off Russian Whites, that 1975 are 29.eight million, got decreased to 4.4 million from the 1980. He’s nonetheless found in considerable number in the Turkmenia, Uzbekistan and Azerbaijan.
At present, breeding work on Russian Light birds is accomplished into the Yasnaya Polyana breeding farm for the Stavropol region. During the first stage (1967-69), reproduction are considering choices and you will parents was analyzed of the the daughters’ development. When you look at the 1970 the new breeding system try switched in order to production of inbred outlines (n = 40) and you can a control population. Area of the sorts of inbreeding try between paternal half of-sibs, hardly ever ranging from full sibs. The brand new wild birds hatched for the 1973 got an inbreeding coefficient (Wright) from almost 37%. An average production of the fresh new six best inbred contours when you look at the 475 days are 2 hundred-205 eggs weighing 54-56 g. The brand new crosses of those outlines got a high design – 211-236 egg annually.
Birds with the population is white inside the lbs and create brief eggs. Their plumage try light; surface and shanks was purple; he’s got one brush.
Brand new alive lbs out-of 8-week-old pullets are 0.55 kilogram; that of cockerels try 0.56 kilogram. Adult hens consider step one.6 kilogram, cocks dos.0 kilogram. Fertility off eggs are at 93%; hatchability is actually 82%; survival price of young and adults try 95 and you may ninety-five% respectively. Egg production towards the initially and you can intermediate people during 70 months out-of life is 182 and you may 206 eggs out-of 55 g.
Of a few attention is the populace of Russian Light birds from the the fresh Most of the-Connection Lookup Institute from Ranch Creature Reproduction and you will Genes. It absolutely was developed by selection for resistance to subnormal temperatures within the the first times of lifestyle and large egg production. Birds try without leukosis and have now a leading effectiveness Marek’s state and you will carcinomas away from organs. Chicks are elevated on temperature that are 8-ten less than typical. In 1984 which populace numbered 500 head.