TY JOUR TI INFLUENCE OF THE REPLACEMENT GILT LIVE WEIGHT AND AGE ON THEIR REPRODUCTIVE QUALITIES IN THE PROCESS OF FIRST INSEMINATION KW gilts KW age KW live weight KW insemination KW reproductive qualities JO Bulletin of KSAU AU Zabolotnaya, A.A. AU Cherkasov, S.I. PY 2012 IS PB Krasnoyarsk State Agrarian University