Abstract
Efforts were made to study microsporogenesis and genetics of fertility restoration of A(4) cytoplasmic-nuclear male-sterility (CMS) system in pigeonpea. The process of microsporogenesis in the male-sterile (ICPA 2039) and its maintainer (ICPB 2039) plants was normal up to the tetrad formation stage. The tapetal cells in the male-sterile anthers degenerated soon after tetrad formation, resulting in shriveled and degenerated microspores. In the maintainer plants, the tapetal cells were normal and microspores were functional. The breakdown of the tapetum before the completion of microsporogenesis was the major cause for the expression of male sterility in A(4) CMS system. The studies on the inheritance of fertility restoration showed that in 3 crosses, a single dominant gene; in 1 cross, 2 duplicate genes; and in another cross, 2 complimentary genes governed the fertility restoration.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
