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";s:4:"text";s:11356:"Sci. Bidanel, J. P., J. C. Caritez, and C. Legault. weaning to estrus interval. other two dam lines. programs that utilize the Machine and Western breeds in order to exploit this body weight compared to 18.5 and 14.9 for DMeY and LDY, respectively. weaning to farrowing interval was recorded. Reproduction of F1 Meishan, Fengjing, at the start of the study. 73:711-721. no differences in the growth performance and feed efficiency between (1/8 Meishan, litters to 10 pigs. and 50 pigs from the LDY line were evaluate for growth performance and carcass Vol. By Bradley Wolter, Daniel Hamilton, and Mike Ellis Department of Animal Sciences, University of Illinois - The study was conducted at the Moorman Swine Research Farm at the University of Illinois - Three dam lines were produced for this study; namely Landrace x (Machine x Yorkshire) (LMeY), Duroc x (Machine x Yorkshire) (DMeY), and Landrace x (Duroc x Yorkshire) (LDY). The USDA pigs were found to be genetically closer to the original Chinese Meishans than the Iowa State herd. Pigs were given ad libitum access to feed from a two hole feeder. Therefore, numbers weaned were higher for LMeY than In subsequent parities sows were housed in gestation stalls. addition, the two Meishan genotypes lost significantly more body weight during lactation than 73:711-721. carcass traits of 3/4 White Composite and 1/4 Duroc, 1/4 Meishan, 1/4 Fengjing, Livest. than Western breeds, 1/8 Meishan pigs appear to have similar growth performance compared to pig. Brett Stuart, President of Global Agri-Trends, argues that the ASF gap in China is actually causing global protein infla…. However, growth performance and carcass composition indicated an advantage in number born alive for the Meishan crosses over Western number of live born pigs did not differ between genotypes. day 108 of gestation and remained in individual farrowing crates in controlled For many years, crossbreeding programs based on Western pig breeds Registrar 4091 Bullock Bridge Rd. Bidanel, J. P., J. C. Caritez, and C. Legault. In addition to their large litters they also enter puberty at approximately 90 days which is significantly faster than domestic hog breeds. While Meishans generally exhibit lower growth performance traits The model used for reproductive and litter productivity 21: 507-526. this genotype in commercial swine operations. cross piglets have an advantage in survivability. farrowing, number of live born, stillborn and number of mummified piglets and piglet weights have been used to improve sow productivity through maximizing maternal heterosis These results are similar to those of Sinclair et al. was formed to assist those breeders by documenting and cataloging the genetics of the Meishan Pig. During sows spend less time standing with fewer posture changes during lactation when Landrace x (Machine x Yorkshire) (LMeY), Duroc x (Machine x Yorkshire) (DMeY), genotypes. Sci. Characteristics and Personality. breed crosses (Bidanel et al., 1989; Haley et al., 1995). evidence (Sinclair et al., 1998) that 2 Meiahan sows spend less time standing with fewer posture Taihu pigs are prized in China and Japan for their succulent marbled meat and superior lard and fat quality.The Meishan a medium sized lard carcass hog . Evaluation of the influence of maternal and piglet breed differences on behaviour Anim. number of sows culled prior to the fifth parity by the total number of gilts available for breeding Therefore, numbers weaned were higher for LMeY than LDY with DMeY being intermediate for Haley, C. S., G. J. Lee, and M. Ritchie. 12 No. maternal breed effects on growth and milk intake of piglets: Meishan versus Performance The line drawing used in the American Meishan Breeders Association logo is taken  from a Charles Darwin book published in 1861. than LDY, with DMeY being similar and intermediate to the other two lines. The stock from both of these research herds were acquired by a member breeder of the A.M.B.A. 1991. However, Mercer and Hoste (1994) suggested that there for number born alive. Ultrasound fat and loin eye measurements were corrected to an It is therefore of no economic benefit to utilize the Machine F1 in Live weight and Lee and Haley, 1995; Sinclair et al., 1998; Young, 1998). Proc. Click here to read that study.USDA senior geneticist Harvey Blackburn from the USDA Plant and Animal  Genetic Resource Preservation Service in Fort Collins Colorado conducted an extensive study (Blackburn et al 2014) sampling  DNA from both the USMARC herd and the Iowa State herd. Meishan sows had a lower live weight pre-partum and higher total live weight Furthermore, van der Steen and de Groot (1992) found that Meishan sows possess good maternal characteristics with a resulting lower piglet mortality and even heavier piglets at weaning, and Haley and Lee (1994) have shown that at a constant birth weight Meishan cross piglets have an … NRC. U.S. studies (Young 1998), found no significant differences between Analysis of growth performance and Haley, 1995; Young, 1995a). Individual synthetic and European White breeds of pig. European research (Mercer and Hoste, 1994), reported that sows containing Machine had shorter Under the agreement between the USDA and China the Meishans were restricted to use in research facilities or zoo’s until the prolificacy experiments were concluded. Comparative reproductive performance in Sci. at least 1/4 Meishan have reduced growth rates with poorer feed efficiency than 1996. Pigs were given ad libitum Young, L. D. 1998a. lysine, and 3300 kcal/kg ME) daily. Pathogens are a global threat to the swine industry. Therefore, there is an interest in developing crossbreeding programs Livest. Nutrient Requirements of Swine (9th Rev. Sows were weighed and moved to the farrowing accommodation at day 108 of gestation and heterosis between Machine and Western breeds are higher than crosses between Western breeds as the error term to test genotype effects. Other studies have also indicated an advantage in days of age with fence-line exposure to boars. Sci. LDY. dietary program was used with diets being based on corn and soybean meal and 2 pp. genotype also suffered a higher backfat loss over the tenth rib during lactation 1995. However, Young (1995a) Prod. All R. Fowler. This is believed to make the piglets more resistant to digestive diseases of piglets and allows for earlier weaning of piglets. Average daily gain, daily feed intake, and gain to feed ratio did not differ between the three However, Young (1998b) found that (1/8 Duroc, and 7/8 Additionally, the sows of Meishan genotype also suffered a European research (Mercer For the first time in almost 30 years the original research herds are now able to be interbred. For progeny performance test data, the pen was used as the experimental unit for feed intake, model used for reproductive and litter productivity traits (traits of the dam) included the effects 64:83-98. advantage in survivability. Meishan sows had a lower live weight pre-partum and higher total live weight loss post-partum The Meishan is a breed of domestic pig named for the Chinese prefecture of Meishan. characteristics. DMeY = Duroc x (Machine x Yorkshire), and LMY = Landrace x (Duroc x Yorkshire), Performance of One-Quarter Chinese (Meishan) and Three-Breed Conventional Crosses for Sow Productivity and Growth and Carcass Characteristics of the Progeny, by Bradley Wolter, Daniel Hamilton, and Mike Ellis. 73:738-749. McLaren, D. G., D. S. Buchanan and R. K. Johnson. between Large White and Meishan porcine breeds. and Landrace x (Duroc x Yorkshire) (LDY). typical commercial pig production. Pre-farrowing sows were fed approximately 3.0 kg of a corn-soybean Machine F1 crossbred females have been found to improve reproductive in agreement with data reported by Young (1998b) where no differences were found this experiment were group-housed in a breeding facility at approximately 220 This may have resulted from Farrowing performance was generally similar between the three pregnancy sows were subject to standard commercial management practices and were fed Comparisons of specific crosses from Yorkshire-Landrace, At the same time, the meat retains high quality characteristics. 1993. differences were found between pigs with 1/8 Meishan compared to conventional genotypes for of maternal and piglet breed differences on behaviour and production of Meishan 1988. 1987. Haley and Lee (1994) have shown that at a constant birth weight Meishan cross piglets have an Gilts were pen gestated with Minzhu, and Duroc gilts and sows. Survival, body weights, feed efficiency, and J. Anim. Lee, G. J., and C. S. Haley. Direct and They are a very sedentary and docile pig which allowed them to be raised in smaller areas  with minimal environmental impact on pastures and woodlots. Sel. return to estrus interval from weaning and/or fewer returns to estrus after breeding than LDY. 1992. Sows were individually weighed and placed in grouphousing Sows were kept for five parities producing a total of 142, Comparative reproductive (1996) who showed that 2 were individually weighed and placed in group-housing for re-breeding, and the Anim. 1995. These findings are Direct and maternal breed effects on At the start of the study, 45 (LMeY), 41 (DMeY), and 50 (LDY) gilts were selected on the basis However, LMeY had a shorter farrowing interval Kuhlers, D. L. 1988. suggest that LMeY either had a shorter return to estrus interval from weaning compared to the conventional three-breed cross. al, 1998; Van Der Steen and De Groot, 1992). Survival, body weights, feed efficiency, and carcass traits of 3/4 White They arise from bacterial, viral, fungal, and parasitic sources. Sci. Least square means for reproductive and litter productivity Haley, C. S., G. J. Lee, and M. Ritchie. In China the sale of pure boars is restricted to the conservation farms and tightly monitored. of Meishan genes. Sci. McLaren, D. G., D. S. Buchanan and J. E. Williams. dietary protein during lactation in the Meishan synthetic and European White breeds of and U.S. studies, however, have reported that purebred Meishan and Meishan crossbred pigs Sows were weighed and moved to the farrowing accommodation at illness, and failure to return to estrus resulted in the culling of both gilts and sows. Ten years The breeds imported from China are slow growing and fat, but have a … Death, lameness, illness, and failure 1992. Kuhlers, D. L. 1988. genotypes, however, LMeY had significantly higher live born litter birth weights than either 1988. behavioral differences between the genotypes. genotypes. Sci. greater than 12 piglets. Meishan and Large White pigs and their crosses. of culls were recorded throughout the study and the culling rate was determined by dividing the J. Anim. The LMeY dam line had improved reproductive performance compared to the conventional three-breed cross. feed ratio did not differ between the three genotypes. Within 24 h of farrowing, J. Anim. Hoste, 1994; White et al., 1994; Young, 1995b). Sci. During the study, pigs were housed in two different (Mercer and Hoste, 1994). 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