Live measurement growth traits are very important economic traits in pig production and breeding. In this research, quantitative trait loci （QTL） were detected for 11 live estimated growth and carcass traits, includ...Live measurement growth traits are very important economic traits in pig production and breeding. In this research, quantitative trait loci （QTL） were detected for 11 live estimated growth and carcass traits, including birth weight （BWT）, average daily gain over testing periods （ADG3）, live backfat thickness at last 3-4th lumbar （LBFT3）, live loin eye area （LLEA）, and so on, in 214 pig resource family population, including 180 F2 individual, by 39 microsatellite marker loci on SSC4, SSC6, SSC7, SSC8, and SSC13. The results indicated that 4 chromosome significant level QTL and one suggestive QTL were detected for ADG3 （at position of 50 cM on SSC8）, LBFT3 （at position of 147 cM on SSC4）, LLEA （one highly significant at position of 48 cM on SSC7; another significant at position of 125 cM on SSC8） and BWT （suggestive significant at position of 0 cM, at marker sw489 on SSC4）. The phenotypic variance of these QTL accounted for 0.95% to 16.91%. Most of them were mentioned in previous reports; except the QTL of LLEA at position of sw1953 on SSC8 which maybe a new QTL.展开更多
Tremendous achievements of live pig industry in China are closely related to the industrialization of the industry,and development trend of the latter is essential for maintaining sustained and stable development of a...Tremendous achievements of live pig industry in China are closely related to the industrialization of the industry,and development trend of the latter is essential for maintaining sustained and stable development of animal husbandry.The paper,on the basis of defining the evolution of industrialized live pig breeding model,elaborated the industrialized operation models of live pig industry in China since 1978,i.e.household operation,large-scale operation,and industrialized operation.The external environment for the development of live pig industry was analyzed,such as global economic competition,development of experience economy,and stronger green consciousness of consumers.Then development trend of industrialized live pig breeding was analyzed as"expanding international market,consolidating domestic market,integrating resources of live pig industry for the integrated operation,promoting the industrialization model and breeding technology driven by live pig processing,applying animal welfare and the internet of things in live pig breeding industry".展开更多
We sought to determine morphological descriptors of Nigerian indigenous pigs (NIP) and crossbred pigs (CBP) based on relationships among live weight (LW) and a suite of 18 morphometric measurements plus the number of ...We sought to determine morphological descriptors of Nigerian indigenous pigs (NIP) and crossbred pigs (CBP) based on relationships among live weight (LW) and a suite of 18 morphometric measurements plus the number of teats. We sampled four locations in southwestern Nigeria and obtained data for a total of 120 NIP and CBP. More female pigs (61.7%) than males (38.3%) were sampled, and they had a mean live weight of 19.9 ± 6.10 kg (range 9 - 32 kg) and 20.1 ± 6.08 kg (range 8 - 37 kg), respectively. The NIP had a longer snout, wider head and longer erect ears than CBP (P 2) of 0.97, 0.92, 0.96, 0.97, 0.91, 0.97, 0.97, 0.90, and 0.93, respectively (all P 2 = 0.93;P 2 = 0.96;P 2 = 0.84;P 2 = 0.94;展开更多
Based on the general equilibrium theory of microeconomics,this study first analyzed the causes of sharp fluctuations in live pig prices,and then explored the financial capabilities of enterprises during the sharp fluc...Based on the general equilibrium theory of microeconomics,this study first analyzed the causes of sharp fluctuations in live pig prices,and then explored the financial capabilities of enterprises during the sharp fluctuations of live pig prices by using the financial data of 4 typical top listed enterprises from 2018 to 2021.By comparing the changes in the capabilities of enterprises,the impact of price on the financial capability of enterprises and differences were identified.The research results showed that the price of live pigs played a decisive role in enterprise profits,and there were huge differences in the fluctuation period.In the sharp increase period of price,price temptation is easy to cause enterprises to over-invest,resulting in excessive growth of enterprise assets,and increasing the business risk of enterprises.Based on the above conclusions,some policy suggestions were put forward to promote the stable development of industry from the three levels of enterprises,industries and government departments.展开更多
基金the National 973 Project of China （G2000016105） National Natural Science Foundation of China （30500358）.
文摘Live measurement growth traits are very important economic traits in pig production and breeding. In this research, quantitative trait loci （QTL） were detected for 11 live estimated growth and carcass traits, including birth weight （BWT）, average daily gain over testing periods （ADG3）, live backfat thickness at last 3-4th lumbar （LBFT3）, live loin eye area （LLEA）, and so on, in 214 pig resource family population, including 180 F2 individual, by 39 microsatellite marker loci on SSC4, SSC6, SSC7, SSC8, and SSC13. The results indicated that 4 chromosome significant level QTL and one suggestive QTL were detected for ADG3 （at position of 50 cM on SSC8）, LBFT3 （at position of 147 cM on SSC4）, LLEA （one highly significant at position of 48 cM on SSC7; another significant at position of 125 cM on SSC8） and BWT （suggestive significant at position of 0 cM, at marker sw489 on SSC4）. The phenotypic variance of these QTL accounted for 0.95% to 16.91%. Most of them were mentioned in previous reports; except the QTL of LLEA at position of sw1953 on SSC8 which maybe a new QTL.
基金Supported by Business Management Cultivated Discipline of Rongchang Campus,Southwest University(RCQG207001)
文摘Tremendous achievements of live pig industry in China are closely related to the industrialization of the industry,and development trend of the latter is essential for maintaining sustained and stable development of animal husbandry.The paper,on the basis of defining the evolution of industrialized live pig breeding model,elaborated the industrialized operation models of live pig industry in China since 1978,i.e.household operation,large-scale operation,and industrialized operation.The external environment for the development of live pig industry was analyzed,such as global economic competition,development of experience economy,and stronger green consciousness of consumers.Then development trend of industrialized live pig breeding was analyzed as"expanding international market,consolidating domestic market,integrating resources of live pig industry for the integrated operation,promoting the industrialization model and breeding technology driven by live pig processing,applying animal welfare and the internet of things in live pig breeding industry".
文摘We sought to determine morphological descriptors of Nigerian indigenous pigs (NIP) and crossbred pigs (CBP) based on relationships among live weight (LW) and a suite of 18 morphometric measurements plus the number of teats. We sampled four locations in southwestern Nigeria and obtained data for a total of 120 NIP and CBP. More female pigs (61.7%) than males (38.3%) were sampled, and they had a mean live weight of 19.9 ± 6.10 kg (range 9 - 32 kg) and 20.1 ± 6.08 kg (range 8 - 37 kg), respectively. The NIP had a longer snout, wider head and longer erect ears than CBP (P 2) of 0.97, 0.92, 0.96, 0.97, 0.91, 0.97, 0.97, 0.90, and 0.93, respectively (all P 2 = 0.93;P 2 = 0.96;P 2 = 0.84;P 2 = 0.94;
文摘Based on the general equilibrium theory of microeconomics,this study first analyzed the causes of sharp fluctuations in live pig prices,and then explored the financial capabilities of enterprises during the sharp fluctuations of live pig prices by using the financial data of 4 typical top listed enterprises from 2018 to 2021.By comparing the changes in the capabilities of enterprises,the impact of price on the financial capability of enterprises and differences were identified.The research results showed that the price of live pigs played a decisive role in enterprise profits,and there were huge differences in the fluctuation period.In the sharp increase period of price,price temptation is easy to cause enterprises to over-invest,resulting in excessive growth of enterprise assets,and increasing the business risk of enterprises.Based on the above conclusions,some policy suggestions were put forward to promote the stable development of industry from the three levels of enterprises,industries and government departments.
