31 results about "Landrace pig" patented technology

The invention relates to a breeding method for improving the lean meat percentage of Meishan pigs and belongs to the field of animal genetic breeding. A Danish landraces as a male parent and a Meishan pigs as a female parent are hybridized in a three-way mode. Offspring breeding standards comprise the following standards: clothing hair is white, the total number born is larger than 14, the lean meat percentage is larger than 55%, and the daily gain is more than 630g. Suzhong pig generation II bred by the breeding method retains the characteristics of high total number born, good meat quality (intramuscular fat is larger than 3%), coarse feed resistance and easy feed of the Meishan pigs, the daily gain is increased to 634.74 grams from 439 grams and is increased by 44.59%, and the lean meat percentage is increased to 54.49% from 42.8% and is increased by 27.31%. The characteristics of fast growth, high lean meat percentage, and the like of the landraces are also retained, the total number born is increased to 14.24 from 11 and is improved by 29.5%, and the meat quality is also improved obviously.

The invention discloses a breeding method for a four-generation lean pig. The method comprises the following steps: using a high-yield Yorkshire sow bred from a Yorkshire sow as a maternal line femaleparent, using a high-yield Landrace pig bred from a Landrace pig as a maternal line male parent, and using a grown second-generation pig hybridized by the high-yield Yorkshire sow and the high-yieldLandrace pig as a progenitor sow; breeding a Duroc pig with a rapid growing speed from the Duroc pig, hybridizing with a Berkshire pig, and selecting a filial generation and fixing crossing, breedingby generations to form a hybrid pig with a pure color gene, namely a Duba pig is a progenitor boar; enabling the progenitor sow to be hybridized with the progenitor boar, to obtain a parent-generationsow.

The invention relates to the technical field of pig farming, and particularly discloses a breeding method for high yield breeding pigs. According to the breeding method, a group subculture breeding method combining opened breeding and closed breeding is adopted, Danxi landrace and landrace foundation groups as well as Yingxi landrace and landrace foundation groups, which are stable, are established by closed breeding, then cross-breeding is performed, YX44 lines which are high in yield of living piggies, good in reproductive performance and high in lean meat factors and growth speed are obtained as female parents, YX55 lines which are high in growth rate, high in lean meat factors and high in yield of living piggies are obtained as male parents, and a high-yield breeding group is established, so that the high yield breeding pigs are obtained. The high yield breeding pigs bred by the method are high in yield of piggies, good in reproductive performance, high in growth speed, high in lean meat factors, and simple and efficient in hybridizing manner.

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 discloses a coefficient model for correcting the body size of a breeding pig. The coefficient model is characterized in that a body height or body length correction equation is shown as follows: corrected body height or body length of the 115 Kg of breeding pig=measured body height or body length*[A-B*(measured body weight / 100)]; the correction of the body length or the body height through taking the body weight of the pig as an independent variable is more superior to that based on the age in days. Parental calibration coefficients of a Duroc pig, a Landrace pig and a large white pig are included. The analysis and the study on the measured data on the body length and the body height of a foreign pig are performed to obtain a body length and body height correction formula and coefficient. Simple regression analysis is performed on data taken within the scope of a certain body weight and the age in days to obtain a regression equation, and the correction coefficient is obtained by utilizing the regression equation. The obtained body size correction coefficient provides a more reliable guarantee for an inventor in aspect of the future body size breeding of the pig and simultaneously provides a reference for related body size study. The correction formula is convenient and practical and has the characteristic of data continuity point prediction, namely any measured value within the scope can obtain a corrected value.

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 present invention discloses a preparation method of a low-salt bone-removed instant ham using a Landrace pig leg as a raw material. The preparation method is characterized by comprising the following steps: bone-removed shaped raw material meat and a pickling agent are put into a rolling and rubbing machine for conducting vacuum rolling, rubbing and pickling; the raw material meat is taken outfrom polyethylene bags, transglutaminase and collagenase are added, and vacuum rolling, rubbing and tenderizing are conducted; the rolled and rubbed raw material meat is subjected to vacuum packagingby using polysulfone film bags for film sleeving pickling and dehydrating; the raw material meat is taken out from the polysulfone film bags, then the raw material meat is packaged under vacuum by using polyethylene bags for still sealed re-softening and enzymatic hydrolysis promoting; the raw material meat is taken out, then the raw material meat is packaged under vacuum by using polysulfone film bags for film-sleeving air-drying and dehydrating; and finally, aging is conducted until the weight loss of the raw material meat reaches 40%, so that a finished product is obtained. Advantages areas follows: the low-salt bone-removed instant ham is short in production cycle, low in salt, high in moisture content, excellent in mouthfeel and taste and high in safety.

The invention belongs to the technical field of pig molecular marker screening, and particularly relates to an SNP molecular marker related to pig feed conversion efficiency. The login number of the SNP molecular marker is MARC0045707, and the SNP chip data of 4005 pigs including the four varieties large white, landrace, Duroc and Pietrain pigs in 16 batches collected in a laboratory are integrated, comparison with a pig reference genome sequence is carried out to obtain genotyping data, a SNP molecular marker related to pig feed conversion efficiency is obtained, the nucleotide sequence of the SNP molecular marker is shown as SEQ ID NO:1, R at the 51st basic group of the sequence is a mutation site, a basic group A is mutated into a basic group G, and the mutation site causes polymorphismof nucleotide of the shown sequence; and when the 51st nucleotide of the sequence shown as SEQ ID NO:1 is G, low pig feed conversion efficiency can be judged.

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 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 present invention relates to the field of stockbreeding and breeding, in particular to a method for breeding lean-meat breeding pigs matched with five-line hybridization, comprising the following steps: S1: selecting Pietrain pigs as the male parent of the paternal line, selecting Duroc pigs as the female parent of the male line, and crossing to obtain “Pi×Du” pigs were used as the terminal male parent; S2: Landrace pigs were selected as the maternal male parent, Large White pigs were selected as the female parent, and “Chang×Du” pigs were crossed to obtain the maternal grandparent female parent; S3: Another Landrace was selected The pig is used as the grandparent male parent to cross with the "long × large" pig obtained in step S2, and the "long × (long × large)" pig is obtained as the terminal female parent; S4: the "long × large" pig is combined with the "long × large" pig (Long×Big)” pigs were crossed to obtain lean-meat breeding pigs with five lines of crosses. The commercial pork pigs bred by this method have the same body shape and appearance, tall and long body; medium-large head, medium-length and wide mouth; high.

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 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 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 relates to a method for identifying Jinhua pig and landrace pig on the basis of SNP (single nucleotide polymorphism) sites. The differences of the SNP sites on Jinhua pig and landrace pig SSC(Sus scrofa chromosome)1 are used for identifying the Jinhua pig and the landrace pig; the SNP names are respectively MARC0039661, ASGA0001510, INRA0001043, DRGA0000202, MARC0041365, DRGA0000334,INRA0003745, INRA0003746, INRA0004022, CASI0011475, INRA0004282, DRGA0001542, DRGA0001542, INRA0004305, INRA0004312, ALGA0006239, INRA0004460, MARC0046211, MARC0036323 and M1GA0001181. The total number of the SNP sites is 20. Compared with the prior art, the method has the advantages that through the selection of 20 SNP sites, the Jinhua pig and the landrace pig can be cheaply, fast and conveniently identified through the testing on the SNP sites.

The invention discloses a method and primers for identifying the litter performance of French-line Landrace pigs. The present invention also discloses FSHR 91773610 C>T, MEP1A 41617218 G>T, PLA2G4A 128109061 Primers for T>C amplification and methods for using the primers to detect, analyze and identify the litter performance of French Landrace pigs. The primer and method can realize early breeding of sows with high litter performance, increase the total litter size, the number of alive piglets and the number of healthy piglets, save feeding costs and shorten the breeding time. The method is simple to implement, easy to operate, and has high practical application value.

The invention relates to the technical field of cleaning equipment, and discloses landrace pig farm cleaning equipment with a cleaning function. A working box is fixedly connected to the tops of supporting legs, a motor box is fixedly connected to the top of the working box, a feeding trough is fixedly connected to the right side of the working box, moving boxes are fixedly connected to the front and rear ends of the top of the feeding trough, a recycling box is fixedly connected to the bottom of the right side of the feeding trough, a baffle is fixedly connected to the right side of the top of the recycling box, and a sewage discharge pipe is fixedly connected to the right side of the recycling box. According to the landrace pig farm cleaning equipment with the cleaning function, through arrangement of a cleaning mechanism, a motor is started, and when the motor works, a bevel gear is driven to rotate, so that a ball nut pair can move on a lead screw; through arrangement of a movable scraping plate on the ball nut pair, the inner bottom of the feeding trough can be scraped, and when the movable scraping plate moves, an inclined scraping plate on the right side of the movable scraping plate scrapes the front surface and the back surface of the feeding trough at the same time.

The invention discloses an identification method for pork of black pigs and landraces to measure fat content, red degree value, pH value, shearing force, cooking loss rate and chewiness of to-be-detected pork samples respectively; the measured figures are input to an identification equation to calculate so as to obtain Y value; when the Y value is less than or equal to 17.28, the samples are black pig pork; when the Y value is greater than or equal to 17.75, the samples are landrace pork; the identification equation is as follow: the Y is the sum of 0.1099* fat content value, 0.1413* red degree value, 0.034*pH value, 0.3186*shearing force value, 0.0982*cooking loss rate, and 0.2981* chewiness value. The identification method has the advantages that the detection method is simple, the operation is easy and the accuracy and practicability are high and the like.

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.

The invention belongs to the field of porcine molecular marker preparation, and in particular relates to the identification and application of SNP in the fourth exon region of porcine INCENP. The present invention obtains a SNP molecular marker associated with boar reproductive traits, its nucleotide sequence is shown in SEQ ID NO: 1, or SEQ ID NO: 2 or SEQ ID NO: 3, in the SEQ ID NO : 1, SEQ ID NO: 2, SEQ ID NO: 3 there is a mutation of C / T, C / T and T / C respectively at 327bp of the sequence shown in SEQ ID NO: 2, and the mutation of the above allele causes the polymorphism of Tsp45I-RFLP sex. The molecular markers were used to analyze the association with reproductive traits of boars in Landrace and Large White pigs. The typing detection method of the molecular marker is also disclosed, which provides a new marker for the reproductive traits of boars and can be used for the evaluation of reproductive traits of boars and genetic improvement.

The invention relates to the technical field of pig raising, and specifically discloses a breeding method for high-yield breeding pigs, which adopts a group subculture selection method combining open and closed breeding, and first establishes a stable basic group of Dan-line Landrace and Large White pigs through closed breeding And the base group of Landrace and Large White pigs of the British line, and then cross-breed the YX44 strain with a high number of live piglets and good reproductive performance while taking into account the lean meat rate and growth rate as the female parent, and cultivate the fast growth rate and high lean meat rate while taking into account the production and liveliness The YX55 strain with a high litter size was used as the male parent to form a high-yield breeding population and obtain high-yield breeding pigs. The high-yield breeding pigs bred by the method of the invention have high litter size, excellent reproductive performance, fast growth rate and high lean meat rate, and the hybrid method is simple and efficient.

The invention belongs to the technical field of pig molecular marker screening, and in particular relates to a SNP molecular marker related to pig feed conversion efficiency. The SNP molecular marker accession number is MARC0045707. By integrating 16 batches of SNP chip data collected by the laboratory, including 4005 pigs of the four breeds of Large White pig, Landrace pig, Duroc pig and Pietrain pig, the comparison pig reference The genotyping data is obtained from the genome sequence, and a SNP molecular marker related to the feed conversion efficiency of pigs is obtained. The nucleotide sequence of the SNP marker is shown in SEQ ID NO: 1, and the 51st base of the sequence is R is a mutation site, which is mutated from base A to base G, and the mutation site causes polymorphism in the nucleotides of the sequence shown; when the 51st nucleotide of the sequence described in SEQ ID NO: 1 is G, it is judged that the feed conversion efficiency of the pig is low.