Cultivation method of common wheat capable of stably expressing six HMW-GS (High Molecular Weight-Glutenin Subunits)
A technology of HMW-GS and stable expression, applied in the field of common wheat cultivation, can solve the problems of lack of molecular structure analysis, lack of stable expression, etc.
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Embodiment 1
[0038] Example 1 SDS-PAGE detection to obtain HMW-GS results
[0039] Extraction solution composition: 62.5 mM Tris-HCl (pH=6.8), 10% (v / v) glycerol, 2% (w / v) SDS, 0.002% (w / v) bromophenol blue, 3.0% (v / v) β-Mercaptoethanol;
[0040] Resolving gel buffer (2.5 L): dissolve 378g Tris, 25g SDS, 95g boric acid, add water to make up to 2.5L, pH 8.9.
[0041] Stacking gel buffer: 1.0 M Tris-HCl, pH=6.8, 10% (W / V) SDS.
[0042] Running Buffer: Dilute Separating Gel Buffer 10-fold
[0043] Polyacrylamide gel composition:
[0044] Stacking Gel (3%) Separating Gel (10%)
[0045] 40% Acrylamide, ml 0.375 2.5
[0046] 2% Methylenebisacrylamide, ml 0.2 0.52
[0047] Resolving gel buffer, ml 0 1
[0048] Stacking gel buffer, ml 0.62 0
[0049] 10% SDS (W / V), ml 0.04 0
[0050] 10% (W / V) amine persulfate, ml 0.05 0.09
[0051] TEMED, μl 5 4.2
[0052] H 2 O, ml 3.7 5.9
[0053] Using the amphiphilic glutelin subunit as a control, electrophoresis at a constant current of 20 m...
Embodiment 2
[0057] Example 2 Somatic chromosome number detection
[0058] The seeds of the hybrid progeny were germinated at a constant temperature of 25°C to take the roots, and the root tips were frozen in an ice-water mixture for 24 hours. Carnot's I fixative solution (alcohol: glacial acetic acid = 3:1) was fixed for 24 h and then transferred to 70% ethanol for preservation. The root tips were placed in 1 mol / L hydrochloric acid, dissociated in a constant temperature water bath at 60 °C for 6-8 min, stained with Schiff reagent, and routinely pressed with modified phenol fuchsin for somatic chromosome observation. Observe 50 cells, statistics.
Embodiment 3
[0059] Example 3 Extraction of genomic DNA
[0060] The genomic DNA of common wheat, wild emmer and hybrid progeny was extracted by 2×CTAB method. The extraction steps were as follows:
[0061] (1) Take 2 g of fresh young leaves, grind them into fine powder in liquid nitrogen, and add 2 × CTAB extract solution (2% CTAB, 1.4 M NaCl, 0.1 M Tris-HCl pH=8.0, 0.1 M preheated to 65 °C) EDTA pH=8.0, add 2% β-mercaptoethanol) 15 ml and mix well before use;
[0062] (2) 65 ℃ water bath for 30-45 min, shake gently during the mixing. After cooling to room temperature, add an equal volume of chloroform:isoamyl alcohol (24:1), mix gently until the supernatant becomes milky, and centrifuge at 4000 rpm for 10 min.
[0063] (3) Take the supernatant, add an equal volume of isopropanol, and ice-bath for 2 h to precipitate DNA;
[0064] (4) Tick out the DNA, wash it twice with 70% alcohol, wash it once with absolute ethanol and air dry the DNA, and dissolve it in an appropriate amount of 1×...
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