METHOD FOR CREATING DETERMINATE GROWTH PLANT TYPE COTTON

Provided is a method for rapidly creating， by means of a fixed-point gene editing technique， a new cotton material， the stems and fruit spurs of which show determinate growth. According to the method， a plant type regulation and control candidate gene GhLSGZ is knocked out by means of a fixed-point gene editing technique so as to obtain a Ghlsgz mutant with determinate growth habits， wherein the mutant can be used for improving the plant type of the cotton， thereby obtaining a new cotton strain with a superior plant type. Transgenic elements can be removed by means of descendant separation of the obtained Ghlsgz mutant. Also provided is a fixed-point knockout mutant gene of the GhLSGZ gene， a functional target sequence for knocking out the GhLSGZ gene and a complementary primer thereof， a fixed-point knockout vector for knocking out the GhLSGZ gene， a fixed-point knockout method for the GhLSGZ gene of a zero-type fruit spur gene and a method for regulating and controlling the plant type and maturity period of the cotton.