was significantly higher for the BC compared to the NBC treatment
groups (0.81 versus 0.49; P < 0.05). Boar contact resulted in
a numerical, but not significant, increase in the proportion of gilts
exhibited a second oestrus (1.00 versus 0.76). There was no significant
effect of boar contact on ovulation rate, embryo number or
survival. Although ovulation ratewas unaffected by oestrus at mating,
embryo numberwas significantly increased (P < 0.05) following
mating at the second compared to the first oestrus (11.2±0.96
versus 7.8±1.17). In conclusion, the current data indicate that the
timing of puberty attainment and oestrus detection are significantly
improved when PG600 treated gilts receive full boar contact. Further,
it is evident that mating gilts at their second as opposed to the
hormonally induced oestrus significantly increases embryonumber
at day 26 post-mating.
was significantly higher for the BC compared to the NBC treatment
groups (0.81 versus 0.49; P < 0.05). Boar contact resulted in
a numerical, but not significant, increase in the proportion of gilts
exhibited a second oestrus (1.00 versus 0.76). There was no significant
effect of boar contact on ovulation rate, embryo number or
survival. Although ovulation ratewas unaffected by oestrus at mating,
embryo numberwas significantly increased (P < 0.05) following
mating at the second compared to the first oestrus (11.2±0.96
versus 7.8±1.17). In conclusion, the current data indicate that the
timing of puberty attainment and oestrus detection are significantly
improved when PG600 treated gilts receive full boar contact. Further,
it is evident that mating gilts at their second as opposed to the
hormonally induced oestrus significantly increases embryonumber
at day 26 post-mating.
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