New sex chromosome out of Australorps is actually replaced of the chromosome from Leghorns

New sex chromosome out of Australorps is actually replaced of the chromosome from Leghorns

Progressive chicken manufacturing from the USSR is developing on the basis out of commercial technology and two-method specialty, we.elizabeth. egg and meats manufacturing.

On the socialized field the typical yearly egg yield out of hens enhanced off 130 for the 1964 to help you 226 in 1984. In the same period the total egg design grew of 29 to help you 73 thousand billion. Numbers of breeding chickens was 230 912 100 from inside the 1980 as the against 174 758 100 during the 1975 – a growth out of 30%.

To own egg design extremely chickens are around three- otherwise five-range crosses centered on brought in grandparental contours of your adopting the: Shaver – 288, 292, 444, Evribreed -Highsex Light, Highsex Brownish while others. Inside exact same go out brand new numbers of eggs-sorts of Russian White birds diminished – they were 6.8-fold reduced from inside the 1980 compared to 1975.

thirteen. Domestic FOWL

To possess beef production the existing brings will be four-range crosses Broiler-6 and you will Broiler-compact-8 which were shaped out-of Dutch contours of your Evribreed organization. New alive pounds regarding seven-week-dated broilers try step one.eight kg, which have 2.8 kilogram of supply being ate each kilogram out of gain.

Total fowl chicken manufacturing try dos.2 million tonnes back in 1984, we.age. three times doing into the 1965 (700 000 t). The food Plan of your USSR envisages creation of step 3.4-3.6 m t regarding fowl beef into the 1990. Attention is paid back towards reassurance out of fowl reproduction for the personal plots of cumulative producers.

However, industrialization away from chicken reproduction has resulted in a drastic reduced the amount of types. Most of them have lost its effective worthy of and so are maintained only while the a hereditary capital in the search centers and by amateur breeders.

Which section makes reference to nearby, dated and you can new types and you will communities regarding Soviet Relationship (come across Desk 13.1). The majority of are usually dual-purpose breeds having a low yields which aren’t utilized by this new chicken globe. However, they provides of several rewarding physiological services – effectiveness condition and evident transform of environment temperatures; high reproductive price under industrial standards; large chicken palatability.

The brand new lines being widely used about poultry community defectively you want hereditary assortment regarding the significantly more than attributes. Based on regional and you can unusual populations from the Soviet Union the new breed organizations and you may highly productive traces and you can crosses is actually being created which happen to be adjusted with the type of climatic areas in the country.

Eggs Types Barred-AND-SPECKLED LEGHORN (Polosato-pestraya leggorn)

The brand new man-made population are brought while in the 1976-84 about Ail-Union Research Institute from Farm Creature Breeding and you can Genes by the crossing Light Leghorn males of your own C line of mix Razor 288 and hens of an experimental distinctive line of Black colored Speckled Australorps. The new genetics responsible for the color off Leghorn plumage – We, Sp, w – and their alleles in Australorps – i, sp, W – were used due to the fact markers in order to make hereditary assortment regarding the new line.

The original specimens (n=30) away from birds homozygous to possess colour family genes was in fact manufactured in 1978 from the inter se breeding of light hybrids (F2) with step three/cuatro regarding Leghorn inheritance. They had a pronounced amount effect of gene B about Leghorn sex chromosome. The male birds (BB spsp) had white plumage having contours of barring and the women birds (B-spsp) were barred-and-mottled which have white down.

In the 1st stage of reproduction brand new inventory from Barred-and-Speckled Leghorns numbered just two hundred-250 direct. The majority of them have been heterozygotes (Ii Spsp and you can ii Spsp) (n=l five hundred) that have annual egg creation of 230 egg weighing 56-57 grams. This is followed by strict possibilities among females (50% intensity) to possess eggs pounds, conformation and you may maturity of males (alternatives strength ten%) in the shape of crosses anywhere between up to 10 traces. One of men chickens an element of the choices standards was basically conformation, lbs and quality of egg of its girls mothers, also to a much decreased the total amount the egg creation of female parents.


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