Brand new sex chromosome off Australorps is actually replaced of the chromosome off Leghorns
Modern poultry development in the USSR is actually development for the basis from commercial development and two-ways specialization, i.e. egg and you may animal meat production.
Throughout the socialized industry the typical yearly egg yield from hens enhanced out of 130 into the 1964 to help you 226 back in 1984. In identical period the entire egg manufacturing increased away from 29 to help you 73 thousand billion. Quantities of breeding chickens were 230 912 000 from inside the 1980 given that up against 174 758 000 for the 1975 – a rise away from 31%. （更多…）