caa a22 4500 388060573 CHVBK 20180307125119.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1017/S1357729800009577 doi S1357729800009577 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800009577 Evaluation of the influence of maternal and piglet breed differences on behaviour and production of Meishan synthetic and European White breeds during lactation [Elektronische Daten] Meishan synthetic sows and gilts have been shown to produce higher litter weights at weaning than White breed type sows and gilts. To investigate the factors contributing to this, 64 multiparous sows were used in a 2 × 2 × 2 factorial experiment to assess the influence of maternal breed type (0·50 Meishan synthetic (M) or purebred European Landrace and Large White (W)), litter size (eight (L) or 12 (H) piglets) and breed of piglet (0·25 Meishan hybrid (m) or white hybrid (w)) on sow and litter production and behaviour over a 28-day lactation. All litters were formed by cross-fostering to standardized litter rearing size 24 h after farrowing. Sows were given food twice daily to appetite. When there were no treatment interactions, main effects are presented. M sows were lighter (M = 215, W = 241 (s.e. 3·61) kg, P < 0·001) and fatter (M = 31·5, W = 21·7 (s.e. 0·72) mm, P < 0·001) at farrowing than W and had higher maternal weight loss (M = 24·7, W = 5·9 (s.e. 0·85) kg, P < 0·001) and higher back fat loss (M = 5·6, W = 2·0 (s.e. 0.28) mm, P < 0·001) in lactation. High litter size resulted in higher maternal weight loss (L = 7·4, H = 13·2 (s.e. 0·85) kg, P < 0·001) and fat loss (L = 2·9, H = 4·7 (s.e. 0·28) mm, P < 0·002) than low litter size. Litter growth rate was higher for M than for W (M = 27·0, W = 14·5 (s.e. 0·42) kg/week, P < 0·002) and for high litter size than for low litter size (L = 24·3, H = 17·3 (s.e. 0·42 kg/week, P < 0·001). The m piglets had lower litter growth rates than w piglets (m = 15·1, w - 16·5 (s.e. 0·42) kg/week, P < 0·001). There were no breed differences in the length of suckling periods but M had shorter suckling intervals than W (M = 38·1, W = 48·7 (s.e. 1·08) min, P < 0·001). It is concluded that the higher litter weights produced by M sows are due solely to maternal effects and not litter size or piglet genotype. Copyright © British Society of Animal Science 1998 breeds nationallicence lactation nationallicence maternal behaviour nationallicence pigs nationallicence Sinclair A. G. Scottish Agricultural College, Craibstone Estate, Bucksburn, Aberdeen AB21 9YA Edwards S. A. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA Hoste S. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA McCartney A. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA Animal Science Cambridge University Press 66/2(1998-04), 423-430 1357-7298 66:2<423 1998 66 ASC https://doi.org/10.1017/S1357729800009577 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800009577 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sinclair A. G. Scottish Agricultural College, Craibstone Estate, Bucksburn, Aberdeen AB21 9YA NATIONALLICENCE 700 1- Edwards S. A. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA NATIONALLICENCE 700 1- Hoste S. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA NATIONALLICENCE 700 1- McCartney A. Pig Improvement Company, Fyfield Wick, Abington 0X13 5NA NATIONALLICENCE 773 0- Animal Science Cambridge University Press 66/2(1998-04), 423-430 1357-7298 66:2<423 1998 66 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge