31 results about "Landrace pig" patented technology

The invention relates to the field of livestock breeding, in particular to a breeding method for five-line crossbreeding mating lean type boars. The method includes the following steps that S1, Pietrain pigs are selected as paternal line male parents, Duroc pigs are selected as maternal line female parents, and Pietrain*Duroc pigs are obtained through crossbreeding to be used as terminal male parents; S2, Landrace pigs are selected as maternal line male parents, large white pigs are selected as maternal line female parents, and Landrace*large white pigs are obtained through crossbreeding to beused as maternal line progenitor female parents; S3, another Landrace pigs are selected as progenitor male parents to be crossbred with the Landrace*large white pigs obtained the second step, so thatLandrace*(Landrace*large white) pigs are obtained and used as terminal female parents; S4, the Landrace*large white pigs are crossbred with the Landrace*(Landrace*large white) pigs are crossbred, sothat five-line crossbreeding mating lean type boars are obtained. The commercial pork pigs bred through the method are uniform in appearance and high and long in body; the heads of the pigs are in a medium size, and the mouths of the pigs have a medium length and are wide; the backs and waists are flat and straight, bellies are slightly curled, and four limbs are stout; the economic body weight islarge in the market, and meat quality is excellent; production efficiency is high.

The invention provides a matched hybridization breeding method of a parent sow. The matched hybridization breeding method of the parent sow comprises the following steps that (1) a grown binary pig which is bred through hybridization is used as a progenitor sow; (2) a white Duroc which is bred through hybridization is used as a progenitor boar; (3) the progenitor sow and the progenitor boar are hybridized, and the parent sow is obtained. The matched hybridization breeding method of the parent sow has the advantages that the Large White, the Landrace pig and the Duroc are used as the basis of matched hybridization, a maternal line and a paternal line are bred, the fertility of the maternal line is good, paternal line is large in size, high in growth speed, good in meat quality, and high in resistance to diseases, the two-line hybridized sow which is finally obtained is high in resistance to diseases and high in stress resistance and fitter for the Chinese pig raising environment, and the economic benefits and the food safety are guaranteed.

The invention discloses a method for raising pigs which are raw materials for dried pork. The method includes selecting three-breed hybrid pigs of large Yorkshire pigs, Landrace pigs and Dahe black pigs to be used as pig breeds; feeding piglets according to conventional processes until the weights of the piglets reach 25 kg; feeding the piglets at small, medium and large phases until the weights of the piglets reach 160 kilograms and then slaughtering the pigs. The feeding periods range from 270 days to 300 days under the control, antibiotics are replaced with Chinese herbal medicine additivesin the three feeding phases, partial corn is replaced with barley and konjac fly powder, the backfat thicknesses and deposition of abdominal fat of the pigs are reduced, the firmness of pork is improved, and the melting point of fat of the pork is increased. The method has the advantages that air-dried fermented pork processed from the pork is good in water-holding capacity and high in fat firmness and melting point, and oil seeping of finished products can be prevented; the pork has obvious marble veins, contains a large quantity of intra-muscular fat and is high in dry matter content, and the finished products have sufficient flavor; medicine residues are prevented; the method has good economic and social benefits.

The invention discloses a detection method of boar KDM5B gene insertion/deletion polymorphism and application. The detection method comprises the following steps: adopting a boar whole genome DNA as a template, amplifying KDM5B genes by virtue of PCR, then performing agarose gel electrophoresis, and identifying 35-bp insertion/deletion polymorphism of the KDM5B gene at a NC_010452.3: g.52599_52633 site. Different gene types of the 35-bp insertion/deletion polymorphism of the KDM5B gene are significantly related to reproductive traits such as short testicle axial length, heavy testicle and the like, the KDM5B gene 35-bp insertion/deletion polymorphism site can be used as a molecular marker for improving the reproductive traits of the Landrace boar, so that the marker assisted selection (MAS) of the Landrace boar reproductive traits is facilitated, and a boar population with excellent genetic resources can be rapidly established.

The invention mainly relates to the technical field of pig raising, and discloses a fattening method of landrace pigs. The method comprises the steps of putting young pigs into pig houses, quickly increasing the weight of the pigs in the early period, slowly increasing the weight of the pigs in the middle period and stabilizing the weight of the pigs in the late period. Feeding is conducted in different stages, and the method is simple and easy to operate; with 100 kg taken as the standard of the weight of the fattened pigs, the fattening time of the landrace pigs is shortened to be 88 days, and the lean meat percentage is 70.4%; plant-derived antimicrobial agents are added in fodder, so that the disease resistance capability of the fattened pigs is improved; no hormone or antibiotic is used in the whole process, so that residues of hormones and antibiotics in pork are avoided, and the pork is safe and healthy; the landrace pigs are put into different pig houses according to individual sizes, the pigs with the same size are fed in the same fattening pig house, so that the fattened landrace pigs can be uniformly fed with fodder, the growth speed is uniform, the management is facilitated, and slaughtering can be conducted at the same time.

The invention discloses a method and primer for identifying farrowing performance of French landrace. The invention further discloses a primer for amplification of FSHR 91773610 C>T, MEP1A 41617218 G>T and PLA2G4A 128109061 T>C and a method for detecting, analyzing and identifying the farrowing performance of the French landrace by using the primer. According to the primer and the method, early breeding of sows with high farrowing performance can be realized, the number of the total farrowing, live farrowing and healthy farrowing of landrace is increased, the feeding cost is saved, and the breeding time is shortened. The method is simple to implement and convenient to operate, and has very high practical application value.

The invention discloses a hybrid breeding production method of high-quality wild boars. Northeast wild boars individuals are adopted as a male parent, high-quality Sutai pigs are adopted as a female parent, in the first stage, the Northeast boars are hybridized with the Sutai pigs, female boars are selected from the produced offspring to constitute a first-generation female pig core group, marked as an F1-generation female pig core group; in the second stage, the F1-generation pig core group is adopted as a female parent, high-quality Landrace pigs are adopted as a male parent, hybridization is conducted, the produced offspring are bred, and a second-generation pig group is constituted, and marked as an F2-generation pig group. By conducting hybridization between Northeast wild boars as the male parent and Sutai pigs as the female parent, the F1 generation is obtained, then by conducting hybridization between the F1 generation as the female parent and the Landrace pigs as the male parent, the F2-generation pig group is obtained, since the F2 generation contains 25% of the Northeast wild boars bloodline and 50% of the Landrace pig bloodline, the hybrid bred F2-generation pig group both keep the nutrient advantages of the wild boars that the pure wild boars are high in adaptability and are resistant to coarse fodder, have three highs and one low (high in protein, amino acid and linoleic acid contents and low in fat content) and the advantages of domestic pigs that the temperament is gentle, the fertility is high, the growth is fast and raising is easily conducted.

The invention provides a feed used for landrace pigs and belongs to the field of pig feeds. In order to solve the problems that an original formula of introduced landrace pig feed is unstable extremely, not only is the feeding cost added and is the feed resource wasted, but also the environmental pollution is increased and the like, the invention provides a feed used for landrace pigs. The feed comprises the following components in parts by weight: 500-550 parts of corn flour, 150-190 parts of fermenting objects of oilseed rape cake, 100-120 parts of wheat bran, 0.1-0.5 part of mango leaf extract, 20-50 parts of fermenting objects of mulberry leaves, 13-16 parts of calcium hydrophosphate, 10-15 parts of stone powder, 1-2 parts of threonine, 1-3 parts of methionine, 0.1-0.8 part of tryptophan, 3-5 parts of table salt, 1-3 parts of choline chloride, 3-5 parts of bentonite and 0.5-1.5 parts of complex vitamin. By virtue of the specie selection and content selection of materials in the feed used for the landrace pigs, the combination of all nutrient substances in the feed is reasonable, so that not only is the feed used for the landrace pigs provided by the invention suitable for digestion and absorption of the landrace pigs, so that the growth speed of the landrace pigs is improved significantly, furthermore, the immunity of the landrace pigs also can be enhanced and the food safety of the pork can be improved.

The invention provides an SNP molecular marker combination for identification of a genetic relationship of pigs, application and a method. The SNP molecular marker combination comprises 200 SNP markers on 18 autosomes of pigs, wherein the SNP molecular marker combination can be applied to identification of the genetic relationship of Duroc pigs, landrace pigs and large white pigs. The identification method comprises the following steps: preparing a liquid phase chip of the 200 SNP markers; constructing a high-throughput sequencing library by using genome DNA of a to-be-detected pig; mixing the liquid chip with the high-throughput sequencing library, capturing a DNA fragment containing a target SNP site in the pig DNA high-throughput sequencing library, carrying out amplifying and purifying to obtain the genotype of the individual to-be-detected pig, and performing paternity test inference according to the genotype. The invention provides a probe and a kit for identifying SNP site information. According to the invention, SNP polymorphism is detected through targeted capture sequencing; and through high-depth sequencing, a typing result is accurate and reliable, and the accuracy of a parent-child relationship is ensured.

The invention discloses an SNP (Single Nucleotide Polymorphism) for selecting piglets with high diarrhea resistance, a detection method and application of the SNP, and relates to the field of animal breeding. Gene markers related to diarrhea resistance or susceptibility of suckling piglets of landrace and Min pigs are screened out, STAT3 is selected as a piglet diarrhea resistance breeding candidate gene, and the piglet diarrhea resistance or susceptibility of the suckling piglets of the landrace and the Min pigs is obtained by searching genetic variation of a pig STAT3 gene promoter region. The molecular marker and the detection method thereof are provided and applied to pig breeding, a pig molecular marker assisted breeding method is established, and a gene marker and a technical method are provided for breeding of a new pig anti-diarrhea strain. The SNP site is located in rs327720240 of a pig STAT3 gene promoter region, and the polymorphism of the SNP site is A/G. The molecular marker is applied to identification of diarrhea resistance or susceptibility of suckling piglets. The nucleotide sequence of the molecular marker is as shown in SEQ ID NO: 1. The method is applied to the breeding field.

The identification, function and application of m⁶A methylation site in the FAM134B mRNA. The main steps include confirming the m⁶A methylation site in FAM134B mRNA by comparative analyzing m⁶A-seq results of Landrace and Jinhua pigs, corresponding with highly conserved motif RRACH (R=G, A; H=A, C, T) and the prediction website; altering the m⁶A methylation in FAM134B mRNA via mutating synonymous codon of FAM134B gene (C1358 to T1358) without changing the amino acid sequence; designing qPCR primers according to the m⁶A peak region and a control region of FAM134B mRNA; extracting total RNA and determining the relative m⁶A level of a single gene by protein immunoprecipitation and qPCR. The m⁶A methylation site of FAM134B mRNA plays a critical rule on fat deposition, which serves as a novel molecular marker and a drug target for treating obesity.

The invention discloses a breeding method for good live pigs. The method comprises following features: step 1, the landrace pigs are selected as the first generation of the male parents, and the yorkshire pigs are selected as the first generation female parents to breed and produce the second generation breeding pigs and selected sows are used as second generation female sows; step 2, duroc pigs are used as the second generation of the male parents and are cross-bred with the obtained sows used as second generation female sows to obtain piglets; the piglets are raised as live pigs. The pigletsobtained by the invention have the advantages of fast speed, resistance to rough food, high body length and large pig body.