Litter size components traits in two Algerian rabbit lines

<p>The aim of this study was to estimate the limiting litter size components in rabbit females from a Synthetic line (n=32) and Local population (n=34). Ovulation rate, number implanted live embryos were counted by laparoscopy at 12 d after mating. Prolificacy (total newborn, born alive mortality) embryonic, foetal prenatal survival day birth 3<sup>rd</sup> gestation measured. The analysed traits body weight female mating, ovulation implanted, resorbed embryos, survival, as well total mortality birth. had higher rate compared (11.03±0.23 vs. 8.41±0.23 corpora lutea; <em>P</em><0.0001). displayed (10.00±0.25 7.85±0.25 embryos; No difference found between groups for embryos. Similar rates reported population. Additionally, newborn than (+1.46 kits; <em>P</em><0.05). A principal analysis performed. first four (PC) explained more 90% variation both lines. Total main variables defining 1<sup>st</sup> PC. Resorbed located 2<sup>nd</sup> embryonic predominant 4<sup>th</sup> phenotypic correlation its high positive lines, except where it moderate line. In conclusion, have those population, consequence released oocytes that successfully reach implantation. However, uterine crowding seems limit foetuses term gestation, while is factor population.</p>