Monitoring of indicators of chromatin status in quails ovarian follicles granulosa cells of different directions of productivity

Relevance. Identification and analysis of the reasons for reducing egg productivity is an urgent problem in quail breeding. The aim this study to assess destructive processes somatic cells ovarian follicles (the level apoptosis pycnosis) mature layers different connection with production quality indicators eggs. Methods. In experiments, pyknosis granulosa 3–8 mm females Estonian, Manchurian, English white, tuxedo, black Pharaoh breeds was evaluated. quails were kept individual cages monopreed pairs a muted 14-hour light day. age 160–180 days. pycnotic assessed by Tarkowski cytological method, apoptotic analyzed staining fluorochromes, propidium iodide acridine orange (10 mcg/mlPI/AO). Results. chromatin. results chromatin destruction using PI/AO showed high average percentage almost all except p < 0.05). maximum proportion dead tested Tuxedo Black (52% 43% respectively). At same time, white breed at 183 days has one best yolk relation weight, which indicates possibility prolonging period their use as laying hens.