The influence of separate factors on mass of calves at birth and suckling productivity of their mothers

Abstract

The article deals with research of influence of duration of
embryogenesis, speed of embryo growth, sex of calves,
maternal and paternal influence on mass of calves at
birth, and also to influence separate of these factors
(duration of embryogenesis, speed of embryo growth,
mass of calves at birth) on the suckling productivity of
cows-mothers. It has been found out that mass of calves
at birth depends on speed of embryo growth and does not
depend on duration of embryogenesis, which, without
regard to a biological conditionality, has a high limit of
changeability. The substantial connection of indexes of
embryo development and mass of calves at birth with the
suckling productivity of their mothers has not been fixed.
The substantial connection of embryo development
indexes and mass of calves at birth with the suckling
productivity of their mothers has not been found out
either.