This technology tackles the limitations prohibiting widespread application of current hybrid breeding systems.
• Faster – 2-line breeding system will allow for faster growth of new sorghum lines,
• Easier – Currently breeders use 3-line systems making breeding cumbersome,
• Safer – The transgenic seeds will be removed by molecular ablation and physical sorting to ensure the male sterile plants in the nursery are transgene-free,
• Cheaper – Maintaining fewer lines should provide a savings in the breeding process, and
• Versatile – Male sterile sorghum plants can be created in diverse genetic backgrounds for hybrids.
Inventors at University of Wisconsin-Milwaukee have developed a novel three-component genetic construct comprising the capacity to produce pure male sterile plants, rescue the male fertility, ablate transgenic pollen, sort the transgenic seeds from non-transgenic seeds, and allow propagation of pure male sterile sorghum plants for hybrid breeding and maintenance of a maintainer line.
Nationalized PCT-US Patent Pending US20210130844A1 Sterile mutant and two-line breeding system
XIN, et al., “Registration of BTx623ms8, a New and Easily Identifiable Nuclear Male Sterile Mutant in Sorghum,” Plant Registrations, Volume12, Issue2, May 2018, Pages 278-281
XIN, et al., “Morphological Characterization of a New and Easily Recognizable Nuclear Male Sterile Mutant of Sorghum (Sorghum bicolor),” PLoS ONE 12(1): e0165195, 2017