Effect of altering dose of PG600 on reproductive performance responses in prepubertal gilts and weaned sows
Effect of altering dose of PG600 on reproductive performance responses in prepubertal gilts and weaned sows
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DOI：
10.1016/j.anireprosci.2005.12.007
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发表时间：
2006-10-01
影响因子：
2.2
通讯作者：
Knox, R. V.
中科院分区：
文献类型：
--
作者：
Breen, S. M.;Rodriguez-Zas, S. L.;Knox, R. V.
本研究探讨了不同剂量的PG600对青春期前母猪和断奶母猪发情排卵反应的影响。试验一对初情期前母猪注射一次(1.0x，400Lu ECG+200Lu hCG，n=74)、一次半(1.5x，n=82)或两次(2.0x，n=71)PG600的效果。发情(58%)和排卵(90%)不受剂量的影响(P>；0.10)。高剂量(P<；0.01)增加了黄体(17、24和25个)的数量，但不增加(P>；0.10)有包囊的母猪比例(分别为26、36和46%，分别为1.0x、1.5x和2.0x)。试验二测定了Ox(n=30)、0.5x(n=32)、1.0x(n=29)和1.5x(n=30)剂量的PG600对断奶母猪的影响。剂量对恢复发情没有影响(90%，P>；0.10)。0x、0.5x、1.0x和1.5x剂量对包囊发生率(3.4%、1.8%、6.4%和29.8%)有影响(P<；0.05)。0.5倍剂量组产仔率(83.2%)高于0倍组(72.1%)和1.5倍组(58.6%)，但与1.0倍组(76.4%)差异不显著。仔猪总产仔数(10.5+/-0.8)在各处理间差异不显著(P>；0.10)。这些数据表明，将PG600的剂量增加到1.5倍，可以增加黄体的数量，但不会改变发情或排卵的比例。降低断奶母猪的PG600剂量并不影响发情和排卵，但0.5倍剂量与不添加PG600相比提高了产仔率。(C)2006爱思唯尔B.V.保留所有权利。
This study evaluated the effects of altering dose of PG600 on estrus and ovulation responses in prepubertal gilts and weaned sows. Experiment I tested the effects of one (1.0 x, 400 lU eCG + 200 lU hCG, n = 74), one and a half (1.5 x, n = 82), or two (2.0 x, n = 71) doses of PG600 for prepubertal gilts. Estrus (58%) and ovulation (90%) were not affected (P > 0.10) by dose. Higher doses increased (P < 0.01) numbers of corpora lutea (17, 24, and 25), but not (P > 0.10) the proportion of gilts with cysts (26, 36, and 46% for 1.0 x, 1.5 x, and 2.0 x, respectively). Experiment 2 tested the effects of Ox (n = 30), 0.5 x (n = 32), 1.0 x (n = 29), or 1.5 x (n = 30) doses of PG600 in weaned sows. Dose did not influence return to estrus (90%, P > 0.10). There was an effect of dose (P < 0.05) on incidence of cysts (3.4, 1.8, 6.4, and 29.8%, for 0 x, 0.5 x, 1.0 x, and 1.5 x doses, respectively). The 0.5 x dose increased (P < 0.01) farrowing rate (83.2%) compared to 0 x (72.1%) and 1.5 x (58.6%), but was not different from 1.0 x (76.4%). Total pigs born (10.5 +/- 0.8) did not differ (P > 0.10) among treatments. These data suggest that increasing dose of PG600 to 1.5 x for gilts increases the number of corpora lutea but does not alter the proportion expressing estrus or ovulating. Reducing dose of PG600 for weaned sows did not alter estrus or ovulation, but the 0.5 x dose increased farrowing rate compared to no PG600. (c) 2006 Elsevier B.V. All rights reserved.