Photoperiod sensitive genetic male sterility mutant of cotton and application thereof

摘要

The present invention provides an application of a photoperiod sensitive genetic male sterility mutant of cotton in hybrid seed production or breeding. Fertility of the photoperiod sensitive genetic male sterility mutant of cotton is influenced by photoperiod, and the photoperiod characteristic is that when illumination time is less than 11.5 hours, the photoperiod is normal fertility, when the illumination time is greater than 12 hours, the photoperiod is genic male sterility, and when the illumination time is 11.5-12 hours, the photoperiod is a sterility variation period having a small amount of pollen. The photoperiod sensitive genetic male sterility mutant of cotton is PSM1 and/or a photoperiod sensitive genetic sterile line bred from hybridization and/or backcrossing and/or selfing of the PSM1. Due to the fact that the photoperiod in the normal production phase of the cotton in the whole Chinese cotton region meets the male sterility condition of the PSM1, hybrid seed production and new variety breeding can be carried out by utilizing the material and progenies thereof.