Effect of mating frequency and weaning-to-mating interval on sow reproductive performance
Effect of mating frequency and weaning-to-mating interval on sow reproductive performance
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交配频率和断奶至交配间隔对母猪繁殖性能的影响
DOI：
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发表时间：
1998
影响因子：
0.7
通讯作者：
W. Marsh
中科院分区：
文献类型：
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作者：
J. Xue;T. Lucia;Y. Koketsu;G. Dial;W. Marsh
方法：从1986年1月1日至1992年12月31日，收集明尼苏达州和爱荷华州20个种猪群的生殖数据。研究期间所有畜群均采用自然交配。在研究中，雌性在单次发情期间繁殖1次、2次或3次，以比较交配频率之间的生育率（受孕率、产仔率和调整产仔率）和产仔数。以前的断奶至交配间隔也被用来研究MF对随后的生育率和产仔数可能的相互作用。结果：与两次交配的后备母猪相比，单次交配的后备母猪受孕率、产仔率和调整产仔率显著降低（P < 0.001）。同样，与两次交配的母猪相比，单次交配的母猪受胎率、产仔率和调整产仔率均显著降低（P < 0.001）。在双配偶和三配偶的雌性之间没有观察到生育率差异。交配频率与母猪产仔数相关，而与母猪产仔数无关。单配母猪的总产仔数和活仔数均低于双配母猪和三配母猪（P < 0.001）。两种母猪的产仔数和三种母猪的产仔数没有差别。MF和PWMI之间没有相互作用与随后的生育力和产仔数相关。与间隔3 - 6天或11 - 14天的母猪相比，间隔7 - 10天PWMI的母猪后续产仔数较小（P < 0.001）。意义：双交配与自然交配可提高女性生育率。两次交配可以提高后备母猪的产仔数，但不能提高母猪的产仔数。与两次交配相比，三次交配不能提高产仔率和产仔数。
Methods: Reproductive data were collected from 20 Minnesota and Iowa breeding herds, covering a 7-year period from January 1, 1986‐December 31, 1992. Natural mating was used in all herds during the study period. Females bred one, two, or three times during a single estrus were included in the study to compare fertility rates (conception rate, farrowing rate, and adjusted farrowing rate) and litter size between mating frequency. Previous weaning-to-mating intervals were also used to investigate possible interactions with MF on subsequent fertility rates and litter size. Results: Compared to gilts that were mated twice, single-mated gilts had significantly lower (P < .001) conception rates, farrowing rates, and adjusted farrowing rates. Similarly, single-mated sows had significantly lower (P < .001) conception rate, farrowing rate, and adjusted farrowing rate compared to those mated twice. No differences in fertility rates were observed between double-mated and triple-mated females. Mating frequency was associated with litter size in gilts, but not in sows. Single-mated gilts had fewer (P < .001) total-born and liveborn pigs than double- and triple-mated gilts. Litter size did not differ between double-mated and triple-mated gilts. There was no interaction between MF and PWMI that was associated with subsequent fertility and litter size. Sows with 7‐10 day PWMI had smaller (P < .001) subsequent litter sizes compared with those that had 3‐6 day or 11‐14 day intervals. Implications: Double matings with natural service may improve female fertility rates. Double matings may improve the litter sizes of gilts, but not sows. Triple matings did not improve fertility rates and litter sizes compared with double matings.