Comparative study of fertility and hatchability of eggs from different hen genotypes

Pavlina Hristakieva, Magdalena Oblakova, Neli Keranova

Abstract: This study investigated the changes at the values of fertile eggs (%), hatchability of set eggs (%)
and hatchability of fertile eggs (%) during the period 2009–2017 in five lines of hens. The changes of
the values at these traits during different years were represented by mathematical models.
Regarding the values of fertile eggs (%) in the studied years from 2009 to 2017 varied at diferent
extent in the five hen genotypes. It was found that in the studied years 2009–2017 fertility of eggs (%)
has the highest coefficient of determination in line STR (76%), and in hatchability of set eggs (%) – in
line GN (75%). In the different years from 2009 to 2017, the hatchability of fertile eggs (%) was statistically
closest values at the eggs of line E (80%). Third-order polynomial regression models depicted
the values of these parameters of the different years in the best way. They represented wave-like patterns
of parameters’ time course and instability in all lines of hens.

Keywords: fertility of eggs; hatchability; mathematical model; regression analysis; reproductive performance

Date published: 2022-07-08