SCAP gene related to lactation of buffalo, and application of same as molecular marker
A molecular marker, buffalo technology, applied in the fields of application, genetic engineering, plant genetic improvement, etc., can solve the problem that there is no buffalo SCAP gene, etc., and achieve high fat-free solid content, high total dry matter content, and high lactose rate Effect
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[0055] Example 1: Preparation of Buffalo Genome Total DNA
[0056] The total genomic DNA of buffalo (Tiangen, Beijing) was prepared by using the blood genomic DNA extraction kit. The specific operation steps are as follows:
[0057] (1) Take 500 μL of whole blood and place it in a 1.5 mL centrifuge tube, add an equal volume of cell lysis solution CL, invert and mix, centrifuge at 12,000 rpm for 1 min, aspirate the supernatant, and leave the precipitate; add an equal volume of cell lysis solution CL, repeat this process Step once; add 4 μL RNAase (100 mg / mL), shake for 15 sec, and let stand for 5 min at room temperature;
[0058] (2) Add 20 μL Proteinase K solution, mix well, add 200 μL Buffer GB, fully invert and mix, place at 56°C for 10 min, invert and mix several times during this period, and the solution should become clear;
[0059] (3) Add 200 μL of absolute ethanol, invert and mix well; flocculent precipitation may occur at this time;
[0060] (4) above-mentioned gain...
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[0066] Example 2: Acquisition of SCAP gene molecular markers for buffalo milk production traits
[0067] 1. Primer design: Using SEQ NO: 1 as the template, using Primer5.0 primer design software, and detected by Oligo software, the forward primer for amplifying the buffalo SCAP gene was determined, and entrusted to Dalian Bao Biotechnology Co., Ltd. to synthesize, of which The DNA sequences of the forward and reverse primers used to amplify the gene are shown in SEQ ID NOs: 2-5.
[0068] 2. PCR amplification reaction
[0069] Fifty buffalo genomic DNA samples were randomly selected for pooling as templates for PCR reactions.
[0070] (1) PCR reaction: The total reaction volume is 40 μL, including 1 μL of buffalo DNA mixed pool template, 20 μL of 10×LA Taq Mix, 2 μL of primer mix (10 mM each) and ddH 2 O 17 μL.
[0071] (2) PCR reaction program: 94°C / 3min; 94°C / 30sec, 60°C / 30sec, 72°C / 1.5min, 30 cycles; 72°C 10min; storage at 4°C
[0072] 3. PCR product sequencing, analysis...
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[0088] Example 3: Gene SCAP related to buffalo lactation and its application as a molecular marker
[0089] The breed of the test buffalo herd was a hybrid buffalo herd. The association analysis of different genotypes of SCAP gene A1717600G, G1718168A, G1743088A, T1753656C, G1759116A, C1759142T, G1760740A, A1762368G, T1766036C loci in buffalo herds and buffalo milk production traits was performed.
[0090] Table 2 shows the results of association analysis of buffalo SCAP genes A1717600G, G1718168A, G1743088A, T1753656C, G1759116A, C1759142T, G1760740A, A1762368G and T1766036C. From Table 2, it can be concluded that genotype was significantly correlated with buffalo milk production traits (P<0.05).
[0091] For the A1717600G locus, the milk production of buffalo individuals with GA genotype was higher than that of AA and GG genotypes.
[0092] For the G1760740A locus, the milk production of buffalo individuals with GG genotype was higher than that of AA and GA genotypes.
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