Abstract:

To plant suitable breeding of new hybrid varieties of marigold in Gansu Province, completely reverse the province depending on the introduced production of species and ensure the sustainable development of marigold industry, since 2002, the male sterile line with dual-use system have been chosen by using sterile plants found in the field, from which the marigolds GM-1 and GM-2 progeny segregating populations have been tested through cross combination in a large number of maintainers by breeding ring method. By comparison of fertility of the obtained lines, two excellent male LYX-1 (Double) and LYX-2 (single lobe), Sterile A-B line have been selected according to the features of fertile plants under the dual system flower petals or ill. The infertility rate is of 50% sterility controlled by a recessive gene, and biological characteristics are stable, which can be used in hybrid combination.