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首页> 外文期刊>Asian journal of animal and veterinary advances >Reproductive Performance of Doe Rabbits as Affect by GNRH Analogue Injection at Different Post-partum Days
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Reproductive Performance of Doe Rabbits as Affect by GNRH Analogue Injection at Different Post-partum Days

机译：不同产后天受GNRH类似物注射影响的母鹿家兔的生殖性能

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Background and Objective: Ovulation and fertilization rates in rabbits are the most important traits which affect directly the viability of their youngs and litter size at birth. This study was carried out to evaluate different reproductive performance parameters of doe rabbits injected with receptal (GnRH analogue) at mating on day 0, 5 or 10 of post-partum. Methodology: Total of 48 sexually mature NZW rabbit does were divided into two groups, control (n = 24) and GnRH (n = 24). The 1st group was i.m., injected with 0.25 mL saline/doe at mating, while the 2nd was injected with 0.25 mL receptal/doe at mating. Immediately after injection, all does were allowed to natural mating by fertile bucks. Does in each of control and GnRH groups were divided into 3 sub-groups (n = 8) to mate on days 0, 5 and 10 post-partum. After parturition, kindling rate, litter size at birth (total and live) and weaning as well as viability rate were recorded. Blood samples were collected from does in each group for progesterone determination in blood serum. Results: Overall mean of all reproductive performance parameters were better (p≥0.05) in GnRH than in control group, the best for does mated on day 10 post partum, while the poorest for those mated on day 5. The effect of interaction between GnRH treatment and mating day was not significant on all reproductive performance parameters. Overall mean of progesterone concentration in serum was not affected by GnRH treatment pre-mating (0 day) and on 7 day post-mating. On days 14, 21 and 28 post-mating, progesterone was higher (pConclusion: Rabbit does injected with GnRH analogue (0.25 mL receptal/doe at mating) on day 10 post-partum resulted in remarkable improvement in in vivo reproductive performance in terms of higher kindling rate, litter size and kid viability rate at birth and weaning.
机译：背景与目的：兔子的排卵和受精率是最重要的特征，直接影响其幼仔的生存能力和出生时的产仔数。进行这项研究以评估在产后第0、5或10天交配注射接受受体（GnRH类似物）的母兔的不同生殖性能参数。方法：将总共48只性成熟的NZW家兔分为两组，即对照组（n = 24）和GnRH（n = 24）。第一组是在交配时注射0.25 mL生理盐水/母鹿，而第二组是在交配时注射0.25 mL生理盐水/母鹿。注射后，立即将所有雄性用可育雄鹿自然交配。对照组和GnRH组中的does分为3个亚组（n = 8）以在产后第0、5和10天交配。分娩后，记录起火率，出生时的产仔数（总和活着）和断奶率以及成活率。从每个组的do中采集血样，以测定血清中的孕酮。结果：GnRH的所有生殖性能参数的总体平均值均优于对照组（p≥0.05），产后第10天交配的最佳，而第5天交配的最差。处理和交配天数在所有生殖性能参数上均不显着。交配前（0天）和交配后7天，血清中孕酮的总体平均浓度不受GnRH治疗的影响。在交配后第14、21和28天，孕酮较高（p结论：在产后第10天，兔子确实注射了GnRH类似物（交配时为0.25 mL受体/母鹿），导致体内生殖性能显着改善。较高的点燃率，产仔数和出生和断奶时的孩子生存率。

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