Jessica R. Craig，Frank R. Dunshea，Jeremy J. Cottrell，John B. Furness，Udani A. Wijesiriwardana，John R. Pluske
翻譯&校對：上海亙泰實(shí)業(yè)集團
與經(jīng)產(chǎn)母豬子代（SP）相比，從出生開(kāi)始，后備母豬子代（GP）的生長(cháng)性能和健康狀況表現往往受到一定程度的限制，其潛在機制尚不完全清楚。本研究旨在比較GP和SP在出生后前24h和斷奶前后生長(cháng)發(fā)育的差異。
試驗選擇36頭GP和37頭SP，分別在4個(gè)時(shí)間點(diǎn)進(jìn)行安樂(lè )死： ①出生組：出生后哺乳前，出生0h、出生24h后，n=33； ②斷奶組：29d左右，斷奶前（PrW）、斷奶后24h（PoW），n=40。安樂(lè )死之前，分別在出生后0 h、24 h、PrW和PoW時(shí)對仔豬進(jìn)行稱(chēng)重，記錄所選組織、器官相對于體重（BW）的重量，并進(jìn)行分析；同時(shí)測量小腸 （SI）、股骨和身體長(cháng)度；收集血清樣本，分析IgG濃度。收集空腸和回腸粘膜樣品，分析總蛋白和乳糖酶的比活度。
試驗數據表明，與SP比較：GP組，各時(shí)間點(diǎn)實(shí)施安樂(lè )死的BW都較輕（P < 0.01）；各時(shí)間點(diǎn)，GP組股四頭肌重量與股骨長(cháng)、BW與體長(cháng)、脾臟重量與BW比值均顯著(zhù)降低（P < 0.05）、SI重量與長(cháng)度比值相對較低 （P < 0.10）；胃和心臟與BW的比值沒(méi)有顯著(zhù)差異 （P ≥ 0.05）。在出生組中，與SP比較，GP豬只腦與肝臟重量比值顯著(zhù)增加（P = 0.044），肝臟與BW比值相似（P = 0.35）；在斷奶組中，GP肝臟與BW比值顯著(zhù)升高（P = 0.014）。在出生和斷奶兩個(gè)組中，GP的腦與BW比值均極顯著(zhù)升高（P < 0.01）。在出生24h時(shí)，GP空腸和回腸粘膜總蛋白含量極顯著(zhù)下降（P = 0.007）；血清IgG濃度也極顯著(zhù)降低（P < 0.001），但在斷奶階段沒(méi)有顯著(zhù)變化（P ≥ 0.10）。在出生組中，GP的乳糖酶比活度顯著(zhù)升高（P = 0.022），而斷奶組中無(wú)差異（P ≥ 0.10）。
綜上所述，這些研究結果表明，與SP相比，GP的早期發(fā)育可能會(huì )被延遲， 而且GP和SP之間在出生后存在的一些解剖學(xué)差異到斷奶時(shí)也仍然存在。
A comparison of the anatomical and gastrointestinal functional development between gilt and sow progeny around birth and weaning
Gilt progeny (GP) often have restricted growth performance and health status in comparison to sow progeny (SP) from birth, with the underlying mechanisms responsible for this yet to be fully understood. The present study aimed to compare differences in growth and development between GP and SP in the first 24 h after birth and in the periweaning period. Two cohorts of pigs including 36 GP and 37 SP were euthanized at 1 of 4 time points: a birth cohort (at birth before suckling, 0 h; and 24 h after birth, 24 h; n = 33) and a weaning cohort (at approximately 29 d of age; “pre-weaning,” PrW; and 24 h after weaning; “post-weaning,” PoW; n = 40). Pigs were individually weighed at 0 h, 24 h, PrW, and PoW up until the point of euthanasia, at which time the weights of selected tissues and organs were recorded and analyzed relative to BW. The length of the small intestine (SI), femur, and body were also measured, and a serum sample was collected and analyzed for IgG concentration.（轉自：豬營(yíng)養國際論壇）