Gene detection substrate, gene detection chip and method for preparing gene detection sample

A gene detection substrate, comprising:

• a substrate;
• and
• a gene detection channel in the substrate, wherein an opening of the gene detection channel is on a side of the substrate,
• wherein the gene detection channel comprises a sample injection groove, a sample outgoing groove and a flow channel groove, and the sample injection groove, the flow channel groove and the sample outgoing groove are sequentially connected to each other and communicated with each other;
• the flow channel groove comprises a plurality of reaction holes and a plurality of flow channel structures;
• the plurality of reaction holes are distributed at intervals, and any two adjacent reaction holes are communicated with each other through the flow channel structure;
• the flow channel structure comprises a first sub-groove, a second sub-groove and a third sub-groove, and the first sub-groove, the second sub-groove and the third sub-groove are sequentially connected to each other and communicated with each other;
• a width of each of the first sub-groove and the third sub-grooves in a first direction is smaller than a width of the second sub-groove in the first direction;
• and
• the first direction is perpendicular to an arrangement direction of two adjacent reaction holes.