Abstract
Male sterile mutants lacking pollen grains in anthers segregated in the B10F2 population of Taichung 65 carrying interchange chromosome 1-3a. Genetical studies were carried out using the male sterile plants to examine the mode of inheritance. Taichung 65 and its isogenic lines having marker genes or interchange chromosome 1-3a were crossed with the mutant. The results showed that the male sterility is controlled by a single recessive gene, and is allelic to the genic male-sterile gene, ms-9. The gene was independent of the breakpoint 1-3a, while it was linked to two marker genes, Ur (Undulate rachis) and Cl (Clustered spikelet) in the sixth linkage group. The order of the three genes was estimated to be Cl-ms-9-Ur. The length of the culm and upper two internodes in the male sterile plants was significantly reduced, compared with that of Taichung 65. Although similar male sterile mutants occurred in an early backcross generation B3F2, it is unlikely that the male sterility was maintained until B10F2. Therefore, it appears that Taichung 65 is prone to undergo gene mutations.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.